/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/ldv-regression/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 23:05:34,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 23:05:34,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 23:05:34,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 23:05:34,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 23:05:34,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 23:05:34,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 23:05:34,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 23:05:34,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 23:05:34,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 23:05:34,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 23:05:34,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 23:05:34,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 23:05:34,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 23:05:34,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 23:05:34,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 23:05:34,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 23:05:34,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 23:05:34,546 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 23:05:34,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 23:05:34,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 23:05:34,550 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 23:05:34,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 23:05:34,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 23:05:34,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 23:05:34,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 23:05:34,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 23:05:34,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 23:05:34,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 23:05:34,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 23:05:34,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 23:05:34,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 23:05:34,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 23:05:34,555 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 23:05:34,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 23:05:34,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 23:05:34,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 23:05:34,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 23:05:34,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 23:05:34,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 23:05:34,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 23:05:34,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 23:05:34,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 23:05:34,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 23:05:34,993 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 23:05:34,994 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 23:05:34,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2021-02-23 23:05:35,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18d18989/07d300543b484b22b931de4eba5a1226/FLAGd270b8f8b [2021-02-23 23:05:35,759 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 23:05:35,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-1.c [2021-02-23 23:05:35,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18d18989/07d300543b484b22b931de4eba5a1226/FLAGd270b8f8b [2021-02-23 23:05:36,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18d18989/07d300543b484b22b931de4eba5a1226 [2021-02-23 23:05:36,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 23:05:36,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 23:05:36,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 23:05:36,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 23:05:36,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 23:05:36,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e5768d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36, skipping insertion in model container [2021-02-23 23:05:36,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 23:05:36,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 23:05:36,376 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] [2021-02-23 23:05:36,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:05:36,392 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 23:05:36,412 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] [2021-02-23 23:05:36,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 23:05:36,431 INFO L208 MainTranslator]: Completed translation [2021-02-23 23:05:36,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36 WrapperNode [2021-02-23 23:05:36,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 23:05:36,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 23:05:36,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 23:05:36,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 23:05:36,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (1/1) ... [2021-02-23 23:05:36,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 23:05:36,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 23:05:36,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 23:05:36,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 23:05:36,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (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 [2021-02-23 23:05:36,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 23:05:36,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 23:05:36,590 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 23:05:36,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 23:05:36,590 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 23:05:36,591 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 23:05:36,591 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 23:05:36,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 23:05:36,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 23:05:36,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 23:05:36,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 23:05:36,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 23:05:36,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 23:05:36,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 23:05:36,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 23:05:36,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 23:05:37,081 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 23:05:37,082 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 23:05:37,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:37 BoogieIcfgContainer [2021-02-23 23:05:37,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 23:05:37,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 23:05:37,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 23:05:37,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 23:05:37,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:05:36" (1/3) ... [2021-02-23 23:05:37,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@928d3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:37, skipping insertion in model container [2021-02-23 23:05:37,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:05:36" (2/3) ... [2021-02-23 23:05:37,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@928d3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:05:37, skipping insertion in model container [2021-02-23 23:05:37,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:05:37" (3/3) ... [2021-02-23 23:05:37,094 INFO L111 eAbstractionObserver]: Analyzing ICFG test29-1.c [2021-02-23 23:05:37,102 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 23:05:37,107 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 23:05:37,128 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 23:05:37,156 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 23:05:37,156 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 23:05:37,157 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 23:05:37,157 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 23:05:37,157 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 23:05:37,157 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 23:05:37,157 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 23:05:37,158 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 23:05:37,178 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-23 23:05:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-23 23:05:37,188 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:05:37,189 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] [2021-02-23 23:05:37,190 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:05:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:05:37,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1513235199, now seen corresponding path program 1 times [2021-02-23 23:05:37,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:05:37,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005308128] [2021-02-23 23:05:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:05:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:37,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:37,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 23:05:37,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:37,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:05:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:37,579 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,580 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:05:37,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005308128] [2021-02-23 23:05:37,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:05:37,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 23:05:37,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860773101] [2021-02-23 23:05:37,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 23:05:37,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:05:37,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 23:05:37,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:05:37,617 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2021-02-23 23:05:37,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:05:37,830 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-02-23 23:05:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 23:05:37,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2021-02-23 23:05:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:05:37,843 INFO L225 Difference]: With dead ends: 63 [2021-02-23 23:05:37,843 INFO L226 Difference]: Without dead ends: 37 [2021-02-23 23:05:37,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 23:05:37,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-23 23:05:37,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-02-23 23:05:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-23 23:05:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-02-23 23:05:37,895 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2021-02-23 23:05:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:05:37,896 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-02-23 23:05:37,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 23:05:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-02-23 23:05:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-23 23:05:37,898 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:05:37,898 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] [2021-02-23 23:05:37,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 23:05:37,899 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:05:37,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:05:37,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1236871684, now seen corresponding path program 1 times [2021-02-23 23:05:37,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:05:37,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466944726] [2021-02-23 23:05:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:05:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:37,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:37,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:37,999 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 23:05:38,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 23:05:38,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:05:38,078 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,080 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 23:05:38,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 23:05:38,121 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,122 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:38,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 23:05:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 23:05:38,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 23:05:38,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 23:05:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 23:05:38,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466944726] [2021-02-23 23:05:38,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 23:05:38,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 23:05:38,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258483202] [2021-02-23 23:05:38,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 23:05:38,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 23:05:38,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 23:05:38,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-23 23:05:38,188 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 8 states. [2021-02-23 23:05:38,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 23:05:38,350 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-02-23 23:05:38,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 23:05:38,351 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2021-02-23 23:05:38,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 23:05:38,352 INFO L225 Difference]: With dead ends: 53 [2021-02-23 23:05:38,352 INFO L226 Difference]: Without dead ends: 35 [2021-02-23 23:05:38,354 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 [2021-02-23 23:05:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-23 23:05:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-02-23 23:05:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-23 23:05:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 34 transitions. [2021-02-23 23:05:38,367 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 34 transitions. Word has length 34 [2021-02-23 23:05:38,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 23:05:38,367 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 34 transitions. [2021-02-23 23:05:38,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 23:05:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 34 transitions. [2021-02-23 23:05:38,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-23 23:05:38,369 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 23:05:38,369 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] [2021-02-23 23:05:38,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 23:05:38,369 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 23:05:38,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 23:05:38,370 INFO L82 PathProgramCache]: Analyzing trace with hash -425481732, now seen corresponding path program 1 times [2021-02-23 23:05:38,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 23:05:38,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659630076] [2021-02-23 23:05:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 23:05:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:05:38,404 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:05:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 23:05:38,426 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 23:05:38,456 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 23:05:38,456 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 23:05:38,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 23:05:38,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:05:38 BoogieIcfgContainer [2021-02-23 23:05:38,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 23:05:38,508 INFO L168 Benchmark]: Toolchain (without parser) took 2382.39 ms. Allocated memory is still 152.0 MB. Free memory was 128.8 MB in the beginning and 90.7 MB in the end (delta: 38.1 MB). Peak memory consumption was 39.1 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:38,508 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 152.0 MB. Free memory is still 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 23:05:38,509 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.53 ms. Allocated memory is still 152.0 MB. Free memory was 127.7 MB in the beginning and 118.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:38,510 INFO L168 Benchmark]: Boogie Preprocessor took 39.99 ms. Allocated memory is still 152.0 MB. Free memory was 118.2 MB in the beginning and 116.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:38,511 INFO L168 Benchmark]: RCFGBuilder took 610.38 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 131.5 MB in the end (delta: -14.8 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:38,512 INFO L168 Benchmark]: TraceAbstraction took 1420.52 ms. Allocated memory is still 152.0 MB. Free memory was 131.0 MB in the beginning and 90.7 MB in the end (delta: 40.3 MB). Peak memory consumption was 41.4 MB. Max. memory is 8.0 GB. [2021-02-23 23:05:38,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 152.0 MB. Free memory is still 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 284.53 ms. Allocated memory is still 152.0 MB. Free memory was 127.7 MB in the beginning and 118.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.99 ms. Allocated memory is still 152.0 MB. Free memory was 118.2 MB in the beginning and 116.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 610.38 ms. Allocated memory is still 152.0 MB. Free memory was 116.7 MB in the beginning and 131.5 MB in the end (delta: -14.8 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1420.52 ms. Allocated memory is still 152.0 MB. Free memory was 131.0 MB in the beginning and 90.7 MB in the end (delta: 40.3 MB). Peak memory consumption was 41.4 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; VAL [d1={8:0}, d2={3:0}] [L16] int n = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=0, d1={8:0}, d2={3:0}, n=0] [L17] EXPR n ? &d1 : &d2 VAL [d1={8:0}, d2={3:0}, n=0, n ? &d1 : &d2={3:0}] [L17] union dummy *pd = n ? &d1 : &d2; VAL [d1={8:0}, d2={3:0}, n=0, n ? &d1 : &d2={3:0}, pd={3:0}] [L18] d1.a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-1, d1={8:0}, d2={3:0}, n=0, pd={3:0}] [L19] COND FALSE !(pd == &d1) VAL [d1={8:0}, d2={3:0}, n=0, pd={3:0}] [L22] pd->b = 0 VAL [d1={8:0}, d2={3:0}, n=0, pd={3:0}] [L24] pd == &d2 && d1.a != 0 VAL [d1={8:0}, d2={3:0}, n=0, pd={3:0}, pd == &d2 && d1.a != 0=1] [L24] EXPR d1.a VAL [d1={8:0}, d1.a=-1, d2={3:0}, n=0, pd={3:0}, pd == &d2 && d1.a != 0=1] [L24] pd == &d2 && d1.a != 0 VAL [d1={8:0}, d1.a=-1, d2={3:0}, n=0, pd={3:0}, pd == &d2 && d1.a != 0=1] [L24] COND TRUE pd == &d2 && d1.a != 0 VAL [d1={8:0}, d1.a=-1, d2={3:0}, n=0, pd={3:0}, pd == &d2 && d1.a != 0=1] [L30] reach_error() VAL [d1={8:0}, d2={3:0}, n=0, pd={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, 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, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s 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: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 6509 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...