/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/simple_3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:21:42,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:21:42,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:21:42,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:21:42,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:21:42,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:21:42,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:21:42,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:21:42,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:21:42,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:21:42,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:21:42,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:21:42,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:21:42,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:21:42,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:21:42,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:21:42,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:21:42,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:21:42,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:21:42,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:21:42,225 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 02:21:42,253 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:21:42,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:21:42,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:21:42,259 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:21:42,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:21:42,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:21:42,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:21:42,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:21:42,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:21:42,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:21:42,261 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:21:42,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:21:42,262 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:21:42,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:21:42,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:21:42,263 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:21:42,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:21:42,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:21:42,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:21:42,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:21:42,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:21:42,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:21:42,264 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:21:42,264 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:21:42,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:21:42,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:21:42,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:21:42,752 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:21:42,753 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:21:42,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_3-1.c [2021-02-22 02:21:42,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fabed9c43/2ea961d417f249158d49f229c9204823/FLAG81733cd11 [2021-02-22 02:21:43,493 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:21:43,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_3-1.c [2021-02-22 02:21:43,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fabed9c43/2ea961d417f249158d49f229c9204823/FLAG81733cd11 [2021-02-22 02:21:43,893 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fabed9c43/2ea961d417f249158d49f229c9204823 [2021-02-22 02:21:43,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:21:43,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:21:43,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:43,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:21:43,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:21:43,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:43" (1/1) ... [2021-02-22 02:21:43,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df7d4ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:43, skipping insertion in model container [2021-02-22 02:21:43,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:43" (1/1) ... [2021-02-22 02:21:43,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:21:43,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:21:44,170 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/simple_3-1.c[376,389] [2021-02-22 02:21:44,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:44,195 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:21:44,208 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/simple_3-1.c[376,389] [2021-02-22 02:21:44,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:44,225 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:21:44,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:44 WrapperNode [2021-02-22 02:21:44,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:44,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:21:44,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:21:44,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:21:44,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:44" (1/1) ... [2021-02-22 02:21:44,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:44" (1/1) ... [2021-02-22 02:21:44,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:44" (1/1) ... [2021-02-22 02:21:44,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:44" (1/1) ... [2021-02-22 02:21:44,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:44" (1/1) ... [2021-02-22 02:21:44,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:44" (1/1) ... [2021-02-22 02:21:44,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:44" (1/1) ... [2021-02-22 02:21:44,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:21:44,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:21:44,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:21:44,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:21:44,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:44" (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 02:21:44,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:21:44,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:21:44,362 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:21:44,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:21:44,362 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:21:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:21:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:21:44,363 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:21:44,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:21:44,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2021-02-22 02:21:44,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:21:44,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:21:44,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:21:44,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:21:44,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:21:44,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:21:44,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:21:44,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:21:44,661 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:21:44,661 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:21:44,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:44 BoogieIcfgContainer [2021-02-22 02:21:44,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:21:44,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:21:44,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:21:44,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:21:44,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:43" (1/3) ... [2021-02-22 02:21:44,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec11533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:44, skipping insertion in model container [2021-02-22 02:21:44,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:44" (2/3) ... [2021-02-22 02:21:44,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec11533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:44, skipping insertion in model container [2021-02-22 02:21:44,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:44" (3/3) ... [2021-02-22 02:21:44,704 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_3-1.c [2021-02-22 02:21:44,730 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:21:44,742 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:21:44,777 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:21:44,808 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:21:44,808 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:21:44,808 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:21:44,809 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:21:44,809 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:21:44,809 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:21:44,809 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:21:44,809 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:21:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2021-02-22 02:21:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-22 02:21:44,838 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:44,839 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 02:21:44,839 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:44,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:44,848 INFO L82 PathProgramCache]: Analyzing trace with hash -108989713, now seen corresponding path program 1 times [2021-02-22 02:21:44,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:44,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991323663] [2021-02-22 02:21:44,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:45,024 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:45,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:45,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:45,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:45,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:45,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:45,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:45,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:45,317 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 02:21:45,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991323663] [2021-02-22 02:21:45,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:45,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:21:45,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385996170] [2021-02-22 02:21:45,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:21:45,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:45,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:21:45,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:21:45,346 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2021-02-22 02:21:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:45,434 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-02-22 02:21:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:21:45,436 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-02-22 02:21:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:45,445 INFO L225 Difference]: With dead ends: 40 [2021-02-22 02:21:45,446 INFO L226 Difference]: Without dead ends: 22 [2021-02-22 02:21:45,450 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 02:21:45,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-02-22 02:21:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-02-22 02:21:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-02-22 02:21:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-02-22 02:21:45,496 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-02-22 02:21:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:45,496 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-02-22 02:21:45,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:21:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-02-22 02:21:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-22 02:21:45,498 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:45,498 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 02:21:45,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:21:45,498 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:45,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:45,499 INFO L82 PathProgramCache]: Analyzing trace with hash -113607318, now seen corresponding path program 1 times [2021-02-22 02:21:45,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:45,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025287821] [2021-02-22 02:21:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:45,503 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:21:45,540 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:21:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:21:45,571 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:21:45,600 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:21:45,601 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:21:45,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:21:45,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:21:45 BoogieIcfgContainer [2021-02-22 02:21:45,616 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:21:45,618 INFO L168 Benchmark]: Toolchain (without parser) took 1715.76 ms. Allocated memory is still 164.6 MB. Free memory was 141.2 MB in the beginning and 114.4 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:45,619 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 164.6 MB. Free memory is still 139.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:21:45,620 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.88 ms. Allocated memory is still 164.6 MB. Free memory was 140.2 MB in the beginning and 131.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:45,621 INFO L168 Benchmark]: Boogie Preprocessor took 31.82 ms. Allocated memory is still 164.6 MB. Free memory was 130.9 MB in the beginning and 129.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:45,621 INFO L168 Benchmark]: RCFGBuilder took 403.97 ms. Allocated memory is still 164.6 MB. Free memory was 129.5 MB in the beginning and 116.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:45,622 INFO L168 Benchmark]: TraceAbstraction took 925.38 ms. Allocated memory is still 164.6 MB. Free memory was 147.8 MB in the beginning and 114.4 MB in the end (delta: 33.4 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:45,626 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 164.6 MB. Free memory is still 139.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 305.88 ms. Allocated memory is still 164.6 MB. Free memory was 140.2 MB in the beginning and 131.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.82 ms. Allocated memory is still 164.6 MB. Free memory was 130.9 MB in the beginning and 129.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 403.97 ms. Allocated memory is still 164.6 MB. Free memory was 129.5 MB in the beginning and 116.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 925.38 ms. Allocated memory is still 164.6 MB. Free memory was 147.8 MB in the beginning and 114.4 MB in the end (delta: 33.4 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned short N = __VERIFIER_nondet_ushort(); [L17] COND FALSE !(x < N) [L21] CALL __VERIFIER_assert(x % 2) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 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: 27 SDtfs, 12 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=29occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 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...