/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/terminator_01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:16:58,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:16:58,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:16:58,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:16:58,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:16:58,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:16:58,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:16:58,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:16:58,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:16:58,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:16:58,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:16:58,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:16:58,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:16:58,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:16:58,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:16:58,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:16:58,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:16:58,326 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:16:58,351 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:16:58,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:16:58,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:16:58,356 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:16:58,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:16:58,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:16:58,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:16:58,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:16:58,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:16:58,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:16:58,358 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:16:58,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:16:58,359 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:16:58,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:16:58,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:16:58,360 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:16:58,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:16:58,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:16:58,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:16:58,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:16:58,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:16:58,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:16:58,361 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:16:58,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:16:58,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:16:58,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:16:58,777 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:16:58,778 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:16:58,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_01.c [2021-02-24 00:16:58,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d7fe177a/8e794c45d0954eea9bd9dc64d4a04d80/FLAG1a1189ccb [2021-02-24 00:16:59,505 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:16:59,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_01.c [2021-02-24 00:16:59,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d7fe177a/8e794c45d0954eea9bd9dc64d4a04d80/FLAG1a1189ccb [2021-02-24 00:16:59,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d7fe177a/8e794c45d0954eea9bd9dc64d4a04d80 [2021-02-24 00:16:59,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:16:59,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:16:59,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:16:59,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:16:59,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:16:59,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:59" (1/1) ... [2021-02-24 00:16:59,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@228c0490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:16:59, skipping insertion in model container [2021-02-24 00:16:59,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:16:59" (1/1) ... [2021-02-24 00:16:59,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:16:59,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:17:00,148 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_01.c[325,338] [2021-02-24 00:17:00,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:00,183 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:17:00,196 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_01.c[325,338] [2021-02-24 00:17:00,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:17:00,216 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:17:00,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:00 WrapperNode [2021-02-24 00:17:00,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:17:00,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:17:00,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:17:00,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:17:00,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:00" (1/1) ... [2021-02-24 00:17:00,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:00" (1/1) ... [2021-02-24 00:17:00,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:00" (1/1) ... [2021-02-24 00:17:00,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:00" (1/1) ... [2021-02-24 00:17:00,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:00" (1/1) ... [2021-02-24 00:17:00,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:00" (1/1) ... [2021-02-24 00:17:00,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:00" (1/1) ... [2021-02-24 00:17:00,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:17:00,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:17:00,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:17:00,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:17:00,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:00" (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 [2021-02-24 00:17:00,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:17:00,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:17:00,366 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:17:00,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:17:00,366 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:17:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:17:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:17:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:17:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:17:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:17:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:17:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:17:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:17:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:17:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:17:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:17:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:17:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:17:00,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:17:00,601 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:17:00,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:00 BoogieIcfgContainer [2021-02-24 00:17:00,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:17:00,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:17:00,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:17:00,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:17:00,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:16:59" (1/3) ... [2021-02-24 00:17:00,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321addcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:00, skipping insertion in model container [2021-02-24 00:17:00,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:17:00" (2/3) ... [2021-02-24 00:17:00,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321addcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:17:00, skipping insertion in model container [2021-02-24 00:17:00,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:17:00" (3/3) ... [2021-02-24 00:17:00,652 INFO L111 eAbstractionObserver]: Analyzing ICFG terminator_01.c [2021-02-24 00:17:00,668 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:17:00,704 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:17:00,751 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:17:00,812 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:17:00,812 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:17:00,812 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:17:00,813 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:17:00,813 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:17:00,815 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:17:00,815 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:17:00,815 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:17:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2021-02-24 00:17:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-24 00:17:00,844 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:00,845 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] [2021-02-24 00:17:00,846 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:00,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:00,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1585410103, now seen corresponding path program 1 times [2021-02-24 00:17:00,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:00,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901226151] [2021-02-24 00:17:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:01,133 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:01,135 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:01,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:01,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:01,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:17:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:17:01,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:17:01,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:17:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:17:01,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901226151] [2021-02-24 00:17:01,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:17:01,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:17:01,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885645102] [2021-02-24 00:17:01,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:17:01,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:17:01,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:17:01,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:17:01,273 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2021-02-24 00:17:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:17:01,380 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-02-24 00:17:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:17:01,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2021-02-24 00:17:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:17:01,392 INFO L225 Difference]: With dead ends: 55 [2021-02-24 00:17:01,392 INFO L226 Difference]: Without dead ends: 31 [2021-02-24 00:17:01,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:17:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-24 00:17:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-02-24 00:17:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-24 00:17:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-02-24 00:17:01,447 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 22 [2021-02-24 00:17:01,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:17:01,448 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-02-24 00:17:01,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:17:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-02-24 00:17:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-24 00:17:01,450 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:17:01,450 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] [2021-02-24 00:17:01,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:17:01,451 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:17:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:17:01,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1903372374, now seen corresponding path program 1 times [2021-02-24 00:17:01,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:17:01,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259684452] [2021-02-24 00:17:01,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:17:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:01,491 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 00:17:01,516 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 00:17:01,544 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 00:17:01,545 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 00:17:01,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:17:01,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:17:01 BoogieIcfgContainer [2021-02-24 00:17:01,581 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:17:01,583 INFO L168 Benchmark]: Toolchain (without parser) took 1673.05 ms. Allocated memory is still 157.3 MB. Free memory was 133.3 MB in the beginning and 102.3 MB in the end (delta: 31.0 MB). Peak memory consumption was 31.2 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:01,584 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 157.3 MB. Free memory is still 131.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:17:01,585 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.30 ms. Allocated memory is still 157.3 MB. Free memory was 132.1 MB in the beginning and 122.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:01,586 INFO L168 Benchmark]: Boogie Preprocessor took 37.61 ms. Allocated memory is still 157.3 MB. Free memory was 122.8 MB in the beginning and 121.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:01,588 INFO L168 Benchmark]: RCFGBuilder took 347.41 ms. Allocated memory is still 157.3 MB. Free memory was 121.4 MB in the beginning and 107.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:01,589 INFO L168 Benchmark]: TraceAbstraction took 943.85 ms. Allocated memory is still 157.3 MB. Free memory was 140.0 MB in the beginning and 102.3 MB in the end (delta: 37.7 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. [2021-02-24 00:17:01,592 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 157.3 MB. Free memory is still 131.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 290.30 ms. Allocated memory is still 157.3 MB. Free memory was 132.1 MB in the beginning and 122.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.61 ms. Allocated memory is still 157.3 MB. Free memory was 122.8 MB in the beginning and 121.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 347.41 ms. Allocated memory is still 157.3 MB. Free memory was 121.4 MB in the beginning and 107.0 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 943.85 ms. Allocated memory is still 157.3 MB. Free memory was 140.0 MB in the beginning and 102.3 MB in the end (delta: 37.7 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int x=__VERIFIER_nondet_int(); VAL [x={3:0}] [L15] int x=__VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=100, x={3:0}] [L16] int *p = &x; VAL [p={3:0}, x={3:0}] [L18] EXPR \read(x) VAL [\read(x)=100, p={3:0}, x={3:0}] [L18] COND FALSE !(x<100) VAL [\read(x)=100, p={3:0}, x={3:0}] [L21] CALL __VERIFIER_assert(0) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 44 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: 39 SDtfs, 5 SDslu, 5 SDs, 0 SdLazy, 28 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred 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: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 1071 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...