/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:47:26,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:47:26,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:47:26,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:47:26,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:47:26,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:47:26,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:47:26,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:47:26,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:47:26,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:47:26,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:47:26,211 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:47:26,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:47:26,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:47:26,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:47:26,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:47:26,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:47:26,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:47:26,213 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:47:26,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:47:26,214 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:47:26,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:47:26,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:47:26,215 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:47:26,215 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:47:26,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:47:26,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:47:26,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:47:26,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:47:26,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:47:26,216 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:47:26,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:47:26,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:47:26,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:47:26,643 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:47:26,644 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:47:26,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_3-1.c [2020-10-23 21:47:26,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65d19b2b/75f77892ed6848cda0984848c0ac602d/FLAG635041630 [2020-10-23 21:47:27,311 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:47:27,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_3-1.c [2020-10-23 21:47:27,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65d19b2b/75f77892ed6848cda0984848c0ac602d/FLAG635041630 [2020-10-23 21:47:27,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65d19b2b/75f77892ed6848cda0984848c0ac602d [2020-10-23 21:47:27,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:47:27,721 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:47:27,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:47:27,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:47:27,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:47:27,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:47:27" (1/1) ... [2020-10-23 21:47:27,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108178cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:27, skipping insertion in model container [2020-10-23 21:47:27,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:47:27" (1/1) ... [2020-10-23 21:47:27,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:47:27,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:47:27,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:47:27,921 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:47:27,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:47:27,953 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:47:27,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:27 WrapperNode [2020-10-23 21:47:27,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:47:27,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:47:27,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:47:27,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:47:27,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:27" (1/1) ... [2020-10-23 21:47:27,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:27" (1/1) ... [2020-10-23 21:47:27,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:27" (1/1) ... [2020-10-23 21:47:27,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:27" (1/1) ... [2020-10-23 21:47:27,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:27" (1/1) ... [2020-10-23 21:47:27,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:27" (1/1) ... [2020-10-23 21:47:27,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:27" (1/1) ... [2020-10-23 21:47:27,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:47:27,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:47:27,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:47:27,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:47:27,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:27" (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 [2020-10-23 21:47:28,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:47:28,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:47:28,068 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:47:28,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:47:28,068 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:47:28,069 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:47:28,069 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:47:28,069 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:47:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:47:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2020-10-23 21:47:28,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:47:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:47:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:47:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:47:28,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:47:28,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:47:28,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:47:28,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:47:28,585 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:47:28,585 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 21:47:28,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:47:28 BoogieIcfgContainer [2020-10-23 21:47:28,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:47:28,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:47:28,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:47:28,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:47:28,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:47:27" (1/3) ... [2020-10-23 21:47:28,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a76aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:47:28, skipping insertion in model container [2020-10-23 21:47:28,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:47:27" (2/3) ... [2020-10-23 21:47:28,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a76aab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:47:28, skipping insertion in model container [2020-10-23 21:47:28,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:47:28" (3/3) ... [2020-10-23 21:47:28,604 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_3-1.c [2020-10-23 21:47:28,616 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:47:28,621 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:47:28,636 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:47:28,671 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:47:28,672 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:47:28,672 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:47:28,672 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:47:28,673 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:47:28,673 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:47:28,673 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:47:28,673 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:47:28,694 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-23 21:47:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 21:47:28,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:28,710 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] [2020-10-23 21:47:28,711 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:28,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:28,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1197886019, now seen corresponding path program 1 times [2020-10-23 21:47:28,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:28,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553685254] [2020-10-23 21:47:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:28,825 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:29,135 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-23 21:47:29,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:47:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:47:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:47:29,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553685254] [2020-10-23 21:47:29,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:47:29,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:47:29,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80810919] [2020-10-23 21:47:29,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:47:29,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:47:29,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:47:29,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:47:29,184 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-23 21:47:29,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:47:29,300 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-23 21:47:29,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:47:29,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-23 21:47:29,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:47:29,310 INFO L225 Difference]: With dead ends: 44 [2020-10-23 21:47:29,310 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 21:47:29,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:47:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 21:47:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 21:47:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 21:47:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-23 21:47:29,358 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-10-23 21:47:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:47:29,359 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-23 21:47:29,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:47:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-23 21:47:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 21:47:29,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:47:29,360 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] [2020-10-23 21:47:29,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:47:29,361 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:47:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:47:29,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1054740264, now seen corresponding path program 1 times [2020-10-23 21:47:29,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:47:29,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103391065] [2020-10-23 21:47:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:47:29,366 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:47:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:47:29,391 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:47:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:47:29,412 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:47:29,457 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 21:47:29,457 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 21:47:29,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:47:29,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:47:29 BoogieIcfgContainer [2020-10-23 21:47:29,478 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:47:29,484 INFO L168 Benchmark]: Toolchain (without parser) took 1763.79 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 112.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:29,485 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 124.9 MB in the end (delta: 102.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:47:29,489 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.50 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:29,490 INFO L168 Benchmark]: Boogie Preprocessor took 35.01 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:29,492 INFO L168 Benchmark]: RCFGBuilder took 600.27 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 101.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 21:47:29,493 INFO L168 Benchmark]: TraceAbstraction took 883.07 ms. Allocated memory is still 151.0 MB. Free memory was 101.4 MB in the beginning and 112.8 MB in the end (delta: -11.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:47:29,503 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 151.0 MB. Free memory was 125.0 MB in the beginning and 124.9 MB in the end (delta: 102.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 229.50 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.01 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 600.27 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 101.8 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 883.07 ms. Allocated memory is still 151.0 MB. Free memory was 101.4 MB in the beginning and 112.8 MB in the end (delta: -11.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] CALL reach_error() [L3] __assert_fail("0", "simple_3-1.c", 3, "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: 28 SDtfs, 12 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 3 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, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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...