/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-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:22:56,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:22:56,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:22:56,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:22:56,448 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 02:22:56,461 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:22:56,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:22:56,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:22:56,463 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:22:56,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:22:56,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:22:56,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:22:56,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:22:56,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:22:56,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:22:56,464 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:22:56,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:22:56,465 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:22:56,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:22:56,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:22:56,465 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:22:56,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:22:56,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:22:56,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:22:56,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:22:56,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:22:56,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:22:56,467 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:22:56,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:22:56,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:22:56,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:22:56,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:22:56,907 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:22:56,908 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:22:56,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2021-02-22 02:22:56,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39f10983a/776af24799634f88a7f5ae07760a4f98/FLAGdaf72119c [2021-02-22 02:22:57,631 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:22:57,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/large_const.i [2021-02-22 02:22:57,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39f10983a/776af24799634f88a7f5ae07760a4f98/FLAGdaf72119c [2021-02-22 02:22:57,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39f10983a/776af24799634f88a7f5ae07760a4f98 [2021-02-22 02:22:57,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:22:57,990 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:22:57,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:22:57,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:22:58,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:22:58,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:22:57" (1/1) ... [2021-02-22 02:22:58,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73a9883a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:58, skipping insertion in model container [2021-02-22 02:22:58,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:22:57" (1/1) ... [2021-02-22 02:22:58,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:22:58,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:22:58,201 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-invgen/large_const.i[893,906] [2021-02-22 02:22:58,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:22:58,227 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:22:58,242 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-invgen/large_const.i[893,906] [2021-02-22 02:22:58,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:22:58,265 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:22:58,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:58 WrapperNode [2021-02-22 02:22:58,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:22:58,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:22:58,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:22:58,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:22:58,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:58" (1/1) ... [2021-02-22 02:22:58,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:58" (1/1) ... [2021-02-22 02:22:58,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:58" (1/1) ... [2021-02-22 02:22:58,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:58" (1/1) ... [2021-02-22 02:22:58,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:58" (1/1) ... [2021-02-22 02:22:58,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:58" (1/1) ... [2021-02-22 02:22:58,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:58" (1/1) ... [2021-02-22 02:22:58,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:22:58,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:22:58,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:22:58,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:22:58,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:58" (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 02:22:58,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:22:58,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:22:58,406 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:22:58,406 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:22:58,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:22:58,406 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:22:58,406 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:22:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:22:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-22 02:22:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-22 02:22:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:22:58,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:22:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:22:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:22:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:22:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:22:58,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:22:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:22:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:22:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:22:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:22:58,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:22:58,833 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:22:58,834 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-22 02:22:58,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:22:58 BoogieIcfgContainer [2021-02-22 02:22:58,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:22:58,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:22:58,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:22:58,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:22:58,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:22:57" (1/3) ... [2021-02-22 02:22:58,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10210e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:22:58, skipping insertion in model container [2021-02-22 02:22:58,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:22:58" (2/3) ... [2021-02-22 02:22:58,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10210e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:22:58, skipping insertion in model container [2021-02-22 02:22:58,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:22:58" (3/3) ... [2021-02-22 02:22:58,845 INFO L111 eAbstractionObserver]: Analyzing ICFG large_const.i [2021-02-22 02:22:58,852 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:22:58,856 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:22:58,878 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:22:58,904 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:22:58,904 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:22:58,905 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:22:58,905 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:22:58,905 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:22:58,905 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:22:58,905 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:22:58,905 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:22:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2021-02-22 02:22:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-22 02:22:58,933 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:58,934 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] [2021-02-22 02:22:58,934 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:58,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:58,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1417410242, now seen corresponding path program 1 times [2021-02-22 02:22:58,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:58,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668404559] [2021-02-22 02:22:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:59,073 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:22:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:59,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:59,321 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:59,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:59,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:59,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:22:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:59,371 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:59,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:59,385 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 02:22:59,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668404559] [2021-02-22 02:22:59,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:22:59,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:22:59,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794109166] [2021-02-22 02:22:59,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:22:59,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:22:59,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:22:59,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:22:59,419 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 3 states. [2021-02-22 02:22:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:22:59,511 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-02-22 02:22:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:22:59,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2021-02-22 02:22:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:22:59,523 INFO L225 Difference]: With dead ends: 83 [2021-02-22 02:22:59,523 INFO L226 Difference]: Without dead ends: 55 [2021-02-22 02:22:59,527 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 02:22:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-02-22 02:22:59,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-02-22 02:22:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-22 02:22:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-02-22 02:22:59,600 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 34 [2021-02-22 02:22:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:22:59,601 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-02-22 02:22:59,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:22:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-02-22 02:22:59,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-22 02:22:59,602 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:59,603 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] [2021-02-22 02:22:59,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:22:59,603 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:59,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:59,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1385213215, now seen corresponding path program 1 times [2021-02-22 02:22:59,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:59,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445115520] [2021-02-22 02:22:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:59,608 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:22:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:59,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:59,712 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:59,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:59,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:59,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:59,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:22:59,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:59,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:22:59,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:59,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:59,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:22:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:22:59,799 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:59,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:22:59,803 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 02:22:59,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445115520] [2021-02-22 02:22:59,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:22:59,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-22 02:22:59,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083895024] [2021-02-22 02:22:59,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-22 02:22:59,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:22:59,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-22 02:22:59,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:22:59,807 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 6 states. [2021-02-22 02:23:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:23:00,149 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-02-22 02:23:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:23:00,150 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2021-02-22 02:23:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:23:00,155 INFO L225 Difference]: With dead ends: 74 [2021-02-22 02:23:00,156 INFO L226 Difference]: Without dead ends: 58 [2021-02-22 02:23:00,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-02-22 02:23:00,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-22 02:23:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-02-22 02:23:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-22 02:23:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-02-22 02:23:00,200 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 34 [2021-02-22 02:23:00,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:23:00,201 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-02-22 02:23:00,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-22 02:23:00,201 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-02-22 02:23:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-22 02:23:00,204 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:23:00,204 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:23:00,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:23:00,205 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:23:00,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:23:00,206 INFO L82 PathProgramCache]: Analyzing trace with hash -359389512, now seen corresponding path program 1 times [2021-02-22 02:23:00,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:23:00,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781918742] [2021-02-22 02:23:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:23:00,234 WARN L141 QuantifierPusher]: treesize reduction 3, result has 91.4 percent of original size [2021-02-22 02:23:00,254 WARN L147 QuantifierPusher]: treesize reduction 3, result has 91.4 percent of original size 32 [2021-02-22 02:23:00,263 WARN L141 QuantifierPusher]: treesize reduction 3, result has 91.4 percent of original size [2021-02-22 02:23:00,268 WARN L147 QuantifierPusher]: treesize reduction 3, result has 91.4 percent of original size 32 [2021-02-22 02:23:00,291 WARN L141 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size [2021-02-22 02:23:00,310 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-22 02:23:00,316 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:00,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:23:00,320 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:23:00,330 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-22 02:23:00,333 WARN L147 QuantifierPusher]: treesize reduction 4, result has 83.3 percent of original size 20 [2021-02-22 02:23:00,344 WARN L141 QuantifierPusher]: treesize reduction 11, result has 83.8 percent of original size [2021-02-22 02:23:00,352 WARN L147 QuantifierPusher]: treesize reduction 11, result has 83.8 percent of original size 57 [2021-02-22 02:23:00,355 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:23:00,403 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-22 02:23:00,404 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:23:00,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 02:23:00,428 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-22 02:23:00,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:23:00 BoogieIcfgContainer [2021-02-22 02:23:00,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:23:00,430 INFO L168 Benchmark]: Toolchain (without parser) took 2453.02 ms. Allocated memory is still 158.3 MB. Free memory was 135.6 MB in the beginning and 110.9 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:00,431 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory was 132.4 MB in the beginning and 132.3 MB in the end (delta: 83.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:23:00,432 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.62 ms. Allocated memory is still 158.3 MB. Free memory was 134.4 MB in the beginning and 124.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:00,434 INFO L168 Benchmark]: Boogie Preprocessor took 38.95 ms. Allocated memory is still 158.3 MB. Free memory was 124.6 MB in the beginning and 123.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:00,435 INFO L168 Benchmark]: RCFGBuilder took 529.06 ms. Allocated memory is still 158.3 MB. Free memory was 123.0 MB in the beginning and 136.6 MB in the end (delta: -13.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:00,440 INFO L168 Benchmark]: TraceAbstraction took 1591.12 ms. Allocated memory is still 158.3 MB. Free memory was 136.1 MB in the beginning and 110.9 MB in the end (delta: 25.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. [2021-02-22 02:23:00,451 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory was 132.4 MB in the beginning and 132.3 MB in the end (delta: 83.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.62 ms. Allocated memory is still 158.3 MB. Free memory was 134.4 MB in the beginning and 124.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.95 ms. Allocated memory is still 158.3 MB. Free memory was 124.6 MB in the beginning and 123.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 529.06 ms. Allocated memory is still 158.3 MB. Free memory was 123.0 MB in the beginning and 136.6 MB in the end (delta: -13.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1591.12 ms. Allocated memory is still 158.3 MB. Free memory was 136.1 MB in the beginning and 110.9 MB in the end (delta: 25.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L25] int c1 = 4000; [L26] int c2 = 2000; [L27] int c3 = 10000; [L28] int n, v; [L29] int i, k, j; [L30] n = __VERIFIER_nondet_int() [L31] COND FALSE !(!(0 <= n && n < 10)) [L32] k = 0 [L33] i = 0 [L34] COND TRUE i < n [L35] i++ [L36] v = __VERIFIER_nondet_int() [L37] COND FALSE !(!(0 <= v && n < 2)) [L38] COND TRUE v == 0 [L39] k += c1 [L34] COND FALSE !(i < n) [L45] j = 0 [L46] COND TRUE j < n [L47] CALL __VERIFIER_assert(k > 0) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 107 SDslu, 31 SDs, 0 SdLazy, 110 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...