/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/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:39:12,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:39:12,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:39:12,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 20:39:12,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:39:12,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:39:12,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:39:12,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:39:12,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:39:12,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:39:12,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:39:12,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:39:12,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:39:12,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:39:12,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:39:12,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:39:12,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:39:12,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:39:12,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:39:12,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:39:12,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:39:12,254 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:39:12,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:39:12,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:39:12,260 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:39:12,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:39:12,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:39:12,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:39:12,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:39:12,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:39:12,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:39:12,262 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:39:12,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:39:12,263 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:39:12,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:39:12,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:39:12,263 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:39:12,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:39:12,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:39:12,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:39:12,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:39:12,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:39:12,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:39:12,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:39:12,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:39:12,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:39:12,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:39:12,749 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:39:12,752 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:39:12,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2021-02-21 20:39:12,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efed6f34e/1021c1c0fbcc453c99888358447dfabf/FLAG296447f90 [2021-02-21 20:39:13,526 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:39:13,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-1.c [2021-02-21 20:39:13,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efed6f34e/1021c1c0fbcc453c99888358447dfabf/FLAG296447f90 [2021-02-21 20:39:13,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efed6f34e/1021c1c0fbcc453c99888358447dfabf [2021-02-21 20:39:13,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:39:13,938 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:39:13,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:39:13,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:39:13,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:39:13,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:39:13" (1/1) ... [2021-02-21 20:39:13,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2262853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:13, skipping insertion in model container [2021-02-21 20:39:13,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:39:13" (1/1) ... [2021-02-21 20:39:13,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:39:13,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:39:14,244 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-1.c[614,627] [2021-02-21 20:39:14,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:39:14,270 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:39:14,294 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-1.c[614,627] [2021-02-21 20:39:14,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:39:14,317 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:39:14,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:14 WrapperNode [2021-02-21 20:39:14,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:39:14,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:39:14,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:39:14,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:39:14,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:14" (1/1) ... [2021-02-21 20:39:14,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:14" (1/1) ... [2021-02-21 20:39:14,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:14" (1/1) ... [2021-02-21 20:39:14,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:14" (1/1) ... [2021-02-21 20:39:14,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:14" (1/1) ... [2021-02-21 20:39:14,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:14" (1/1) ... [2021-02-21 20:39:14,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:14" (1/1) ... [2021-02-21 20:39:14,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:39:14,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:39:14,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:39:14,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:39:14,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:14" (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 [2021-02-21 20:39:14,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:39:14,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:39:14,528 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:39:14,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:39:14,528 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:39:14,528 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:39:14,529 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:39:14,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:39:14,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:39:14,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:39:14,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:39:14,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:39:14,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:39:14,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:39:14,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:39:14,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:39:15,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:39:15,135 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 20:39:15,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:39:15 BoogieIcfgContainer [2021-02-21 20:39:15,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:39:15,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:39:15,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:39:15,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:39:15,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:39:13" (1/3) ... [2021-02-21 20:39:15,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d13a570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:39:15, skipping insertion in model container [2021-02-21 20:39:15,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:14" (2/3) ... [2021-02-21 20:39:15,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d13a570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:39:15, skipping insertion in model container [2021-02-21 20:39:15,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:39:15" (3/3) ... [2021-02-21 20:39:15,149 INFO L111 eAbstractionObserver]: Analyzing ICFG test29-1.c [2021-02-21 20:39:15,156 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:39:15,162 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:39:15,183 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:39:15,208 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:39:15,209 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:39:15,209 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:39:15,209 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:39:15,209 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:39:15,209 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:39:15,210 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:39:15,210 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:39:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-21 20:39:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-21 20:39:15,237 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:39:15,238 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] [2021-02-21 20:39:15,239 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:39:15,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:39:15,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1513235199, now seen corresponding path program 1 times [2021-02-21 20:39:15,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:39:15,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046528305] [2021-02-21 20:39:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:39:15,342 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:39:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:15,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:15,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:15,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:15,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 20:39:15,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:15,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:15,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:39:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:15,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:15,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:39:15,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046528305] [2021-02-21 20:39:15,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:39:15,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:39:15,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209574853] [2021-02-21 20:39:15,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:39:15,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:39:15,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:39:15,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:39:15,806 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2021-02-21 20:39:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:39:16,109 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-02-21 20:39:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:39:16,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2021-02-21 20:39:16,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:39:16,124 INFO L225 Difference]: With dead ends: 63 [2021-02-21 20:39:16,126 INFO L226 Difference]: Without dead ends: 37 [2021-02-21 20:39:16,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:39:16,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-21 20:39:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-02-21 20:39:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-21 20:39:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-02-21 20:39:16,207 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2021-02-21 20:39:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:39:16,207 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-02-21 20:39:16,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:39:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-02-21 20:39:16,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-21 20:39:16,211 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:39:16,212 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] [2021-02-21 20:39:16,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:39:16,212 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:39:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:39:16,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1236871684, now seen corresponding path program 1 times [2021-02-21 20:39:16,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:39:16,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351672863] [2021-02-21 20:39:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:39:16,224 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:39:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:16,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:16,333 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:16,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:16,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:39:16,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:16,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 20:39:16,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:16,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:39:16,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:16,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 20:39:16,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:16,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 20:39:16,394 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:16,395 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:16,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:39:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:16,455 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:16,456 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:39:16,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351672863] [2021-02-21 20:39:16,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:39:16,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 20:39:16,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357864011] [2021-02-21 20:39:16,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 20:39:16,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:39:16,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 20:39:16,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-21 20:39:16,466 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 8 states. [2021-02-21 20:39:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:39:16,754 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-02-21 20:39:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 20:39:16,754 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2021-02-21 20:39:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:39:16,756 INFO L225 Difference]: With dead ends: 53 [2021-02-21 20:39:16,756 INFO L226 Difference]: Without dead ends: 35 [2021-02-21 20:39:16,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-21 20:39:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-21 20:39:16,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-02-21 20:39:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-21 20:39:16,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 34 transitions. [2021-02-21 20:39:16,789 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 34 transitions. Word has length 34 [2021-02-21 20:39:16,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:39:16,790 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 34 transitions. [2021-02-21 20:39:16,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 20:39:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 34 transitions. [2021-02-21 20:39:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-21 20:39:16,791 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:39:16,792 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] [2021-02-21 20:39:16,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:39:16,792 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:39:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:39:16,793 INFO L82 PathProgramCache]: Analyzing trace with hash -425481732, now seen corresponding path program 1 times [2021-02-21 20:39:16,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:39:16,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056732943] [2021-02-21 20:39:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:39:16,797 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:39:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:39:16,828 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:39:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:39:16,857 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:39:16,889 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:39:16,889 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:39:16,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:39:16,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:39:16 BoogieIcfgContainer [2021-02-21 20:39:16,908 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:39:16,910 INFO L168 Benchmark]: Toolchain (without parser) took 2985.79 ms. Allocated memory is still 151.0 MB. Free memory was 128.5 MB in the beginning and 127.6 MB in the end (delta: 901.2 kB). Peak memory consumption was 2.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:16,911 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:39:16,912 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.17 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 117.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:16,913 INFO L168 Benchmark]: Boogie Preprocessor took 66.53 ms. Allocated memory is still 151.0 MB. Free memory was 117.8 MB in the beginning and 116.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:16,913 INFO L168 Benchmark]: RCFGBuilder took 749.80 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 130.8 MB in the end (delta: -14.5 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:16,914 INFO L168 Benchmark]: TraceAbstraction took 1768.37 ms. Allocated memory is still 151.0 MB. Free memory was 130.3 MB in the beginning and 127.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:16,918 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 373.17 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 117.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.53 ms. Allocated memory is still 151.0 MB. Free memory was 117.8 MB in the beginning and 116.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 749.80 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 130.8 MB in the end (delta: -14.5 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1768.37 ms. Allocated memory is still 151.0 MB. Free memory was 130.3 MB in the beginning and 127.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 30]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] union dummy d1, d2; [L16] int n = __VERIFIER_nondet_int(); [L17] EXPR n ? &d1 : &d2 [L17] union dummy *pd = n ? &d1 : &d2; [L18] d1.a = __VERIFIER_nondet_int() [L19] COND FALSE !(pd == &d1) [L22] pd->b = 0 [L24] pd == &d2 && d1.a != 0 [L24] EXPR d1.a [L24] pd == &d2 && d1.a != 0 [L24] COND TRUE pd == &d2 && d1.a != 0 [L30] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 74 SDtfs, 68 SDslu, 117 SDs, 0 SdLazy, 138 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred 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, 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...