/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/ldv-regression/test08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:34:45,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:34:45,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:34:45,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:34:45,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:34:45,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:34:45,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:34:45,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:34:45,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:34:45,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:34:45,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:34:45,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:34:45,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:34:45,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:34:45,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:34:45,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:34:45,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:34:45,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:34:45,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:34:45,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:34:45,651 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 20:34:45,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:34:45,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:34:45,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:34:45,666 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:34:45,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:34:45,666 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:34:45,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:34:45,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:34:45,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:34:45,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:34:45,667 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:34:45,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:34:45,668 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:34:45,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:34:45,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:34:45,668 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:34:45,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:34:45,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:34:45,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:34:45,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:34:45,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:34:45,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:34:45,670 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:34:46,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:34:46,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:34:46,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:34:46,150 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:34:46,151 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:34:46,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test08.c [2020-10-23 20:34:46,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2f5bda01/27381d02b48f49e3a34f05d8b95e62e8/FLAG15a2cf27d [2020-10-23 20:34:46,813 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:34:46,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test08.c [2020-10-23 20:34:46,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2f5bda01/27381d02b48f49e3a34f05d8b95e62e8/FLAG15a2cf27d [2020-10-23 20:34:47,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2f5bda01/27381d02b48f49e3a34f05d8b95e62e8 [2020-10-23 20:34:47,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:34:47,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:34:47,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:34:47,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:34:47,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:34:47,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:34:47" (1/1) ... [2020-10-23 20:34:47,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a52da26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:47, skipping insertion in model container [2020-10-23 20:34:47,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:34:47" (1/1) ... [2020-10-23 20:34:47,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:34:47,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:34:47,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:34:47,457 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:34:47,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:34:47,494 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:34:47,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:47 WrapperNode [2020-10-23 20:34:47,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:34:47,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:34:47,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:34:47,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:34:47,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:47" (1/1) ... [2020-10-23 20:34:47,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:47" (1/1) ... [2020-10-23 20:34:47,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:47" (1/1) ... [2020-10-23 20:34:47,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:47" (1/1) ... [2020-10-23 20:34:47,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:47" (1/1) ... [2020-10-23 20:34:47,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:47" (1/1) ... [2020-10-23 20:34:47,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:47" (1/1) ... [2020-10-23 20:34:47,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:34:47,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:34:47,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:34:47,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:34:47,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:47" (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 20:34:47,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:34:47,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:34:47,630 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:34:47,630 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-10-23 20:34:47,631 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:34:47,631 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:34:47,631 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:34:47,631 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:34:47,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:34:47,632 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-23 20:34:47,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:34:47,632 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:34:47,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:34:47,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:34:47,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:34:47,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:34:47,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:34:48,237 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:34:48,238 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:34:48,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:34:48 BoogieIcfgContainer [2020-10-23 20:34:48,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:34:48,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:34:48,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:34:48,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:34:48,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:34:47" (1/3) ... [2020-10-23 20:34:48,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a9e3f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:34:48, skipping insertion in model container [2020-10-23 20:34:48,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:34:47" (2/3) ... [2020-10-23 20:34:48,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a9e3f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:34:48, skipping insertion in model container [2020-10-23 20:34:48,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:34:48" (3/3) ... [2020-10-23 20:34:48,258 INFO L111 eAbstractionObserver]: Analyzing ICFG test08.c [2020-10-23 20:34:48,274 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:34:48,280 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:34:48,296 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:34:48,336 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:34:48,336 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:34:48,336 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:34:48,337 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:34:48,337 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:34:48,337 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:34:48,337 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:34:48,337 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:34:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-10-23 20:34:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 20:34:48,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:48,377 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, 1, 1, 1] [2020-10-23 20:34:48,377 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:48,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:48,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1393765424, now seen corresponding path program 1 times [2020-10-23 20:34:48,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:48,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984204545] [2020-10-23 20:34:48,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:48,494 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:34:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:48,913 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-23 20:34:48,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:34:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:49,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 20:34:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:49,090 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 20:34:49,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984204545] [2020-10-23 20:34:49,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:34:49,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 20:34:49,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032540773] [2020-10-23 20:34:49,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 20:34:49,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:34:49,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 20:34:49,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:34:49,154 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 9 states. [2020-10-23 20:34:49,749 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-23 20:34:49,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:34:49,876 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2020-10-23 20:34:49,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:34:49,879 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-23 20:34:49,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:34:49,889 INFO L225 Difference]: With dead ends: 81 [2020-10-23 20:34:49,889 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 20:34:49,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:34:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 20:34:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-23 20:34:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 20:34:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 48 transitions. [2020-10-23 20:34:49,949 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 48 transitions. Word has length 47 [2020-10-23 20:34:49,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:34:49,950 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 48 transitions. [2020-10-23 20:34:49,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 20:34:49,950 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 48 transitions. [2020-10-23 20:34:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-23 20:34:49,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:49,952 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, 1, 1, 1, 1] [2020-10-23 20:34:49,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:34:49,953 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:49,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:49,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1951203953, now seen corresponding path program 1 times [2020-10-23 20:34:49,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:49,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686571332] [2020-10-23 20:34:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:49,958 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:34:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:34:50,009 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:34:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:34:50,094 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:34:50,145 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:34:50,145 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:34:50,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:34:50,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:34:50 BoogieIcfgContainer [2020-10-23 20:34:50,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:34:50,168 INFO L168 Benchmark]: Toolchain (without parser) took 2981.96 ms. Allocated memory is still 166.7 MB. Free memory was 143.7 MB in the beginning and 145.5 MB in the end (delta: -1.8 MB). Peak memory consumption was 53.3 MB. Max. memory is 8.0 GB. [2020-10-23 20:34:50,169 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.5 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:34:50,170 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.12 ms. Allocated memory is still 166.7 MB. Free memory was 143.0 MB in the beginning and 133.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:34:50,171 INFO L168 Benchmark]: Boogie Preprocessor took 38.05 ms. Allocated memory is still 166.7 MB. Free memory was 133.3 MB in the beginning and 131.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:34:50,172 INFO L168 Benchmark]: RCFGBuilder took 705.89 ms. Allocated memory is still 166.7 MB. Free memory was 131.8 MB in the beginning and 147.5 MB in the end (delta: -15.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:34:50,173 INFO L168 Benchmark]: TraceAbstraction took 1919.83 ms. Allocated memory is still 166.7 MB. Free memory was 147.1 MB in the beginning and 145.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 56.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:34:50,177 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.5 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 303.12 ms. Allocated memory is still 166.7 MB. Free memory was 143.0 MB in the beginning and 133.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.05 ms. Allocated memory is still 166.7 MB. Free memory was 133.3 MB in the beginning and 131.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 705.89 ms. Allocated memory is still 166.7 MB. Free memory was 131.8 MB in the beginning and 147.5 MB in the end (delta: -15.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1919.83 ms. Allocated memory is still 166.7 MB. Free memory was 147.1 MB in the beginning and 145.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 56.0 MB. 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: [L6] int a, b; [L7] int *p1, *p2; [L21] p1 = &a [L22] p2 = &b [L24] b = 1 [L25] a = 5 [L27] EXPR \read(a) [L27] a-- [L29] CALL, EXPR f() [L10] EXPR \read(*p1) [L10] EXPR \read(*p2) [L10] EXPR \read(a) [L10] int v = *p1 + *p2 - a; [L11] COND TRUE v == 1 [L12] p1 = p2 [L13] return v; [L29] RET, EXPR f() [L29] a = f() [L31] EXPR \read(a) [L31] COND TRUE a && p1 == p2 [L38] CALL reach_error() [L3] __assert_fail("0", "test08.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 167 SDslu, 90 SDs, 0 SdLazy, 90 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred 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...