/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/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 00:37:22,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 00:37:22,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 00:37:22,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 00:37:22,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 00:37:22,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 00:37:22,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 00:37:22,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 00:37:22,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 00:37:22,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 00:37:22,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 00:37:22,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 00:37:22,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 00:37:22,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 00:37:22,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 00:37:22,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 00:37:22,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 00:37:22,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 00:37:22,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 00:37:22,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 00:37:22,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 00:37:22,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 00:37:22,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 00:37:22,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 00:37:22,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 00:37:22,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 00:37:22,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 00:37:22,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 00:37:22,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 00:37:22,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 00:37:22,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 00:37:22,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 00:37:22,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 00:37:22,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 00:37:22,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 00:37:22,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 00:37:22,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 00:37:22,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 00:37:22,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 00:37:22,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 00:37:22,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 00:37:22,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 00:37:22,431 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 00:37:22,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 00:37:22,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 00:37:22,434 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 00:37:22,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 00:37:22,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 00:37:22,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 00:37:22,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 00:37:22,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 00:37:22,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 00:37:22,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 00:37:22,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 00:37:22,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 00:37:22,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 00:37:22,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 00:37:22,437 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 00:37:22,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 00:37:22,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 00:37:22,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:37:22,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 00:37:22,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 00:37:22,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 00:37:22,438 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 00:37:22,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 00:37:22,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 00:37:22,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 00:37:22,857 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 00:37:22,858 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 00:37:22,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-24 00:37:22,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c232412ba/2edc99e608614c33b966537d2f4a19d5/FLAG85d9f8d1c [2020-10-24 00:37:23,604 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 00:37:23,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-24 00:37:23,614 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c232412ba/2edc99e608614c33b966537d2f4a19d5/FLAG85d9f8d1c [2020-10-24 00:37:23,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c232412ba/2edc99e608614c33b966537d2f4a19d5 [2020-10-24 00:37:23,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 00:37:23,975 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 00:37:23,977 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 00:37:23,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 00:37:23,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 00:37:23,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:37:23" (1/1) ... [2020-10-24 00:37:23,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a5a328e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:37:23, skipping insertion in model container [2020-10-24 00:37:23,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:37:23" (1/1) ... [2020-10-24 00:37:23,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 00:37:24,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 00:37:24,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:37:24,204 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 00:37:24,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 00:37:24,238 INFO L208 MainTranslator]: Completed translation [2020-10-24 00:37:24,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:37:24 WrapperNode [2020-10-24 00:37:24,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 00:37:24,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 00:37:24,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 00:37:24,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 00:37:24,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:37:24" (1/1) ... [2020-10-24 00:37:24,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:37:24" (1/1) ... [2020-10-24 00:37:24,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:37:24" (1/1) ... [2020-10-24 00:37:24,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:37:24" (1/1) ... [2020-10-24 00:37:24,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:37:24" (1/1) ... [2020-10-24 00:37:24,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:37:24" (1/1) ... [2020-10-24 00:37:24,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:37:24" (1/1) ... [2020-10-24 00:37:24,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 00:37:24,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 00:37:24,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 00:37:24,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 00:37:24,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:37:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 00:37:24,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 00:37:24,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 00:37:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 00:37:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-10-24 00:37:24,359 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 00:37:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 00:37:24,359 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 00:37:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 00:37:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 00:37:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 00:37:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-10-24 00:37:24,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 00:37:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 00:37:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 00:37:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 00:37:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 00:37:24,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 00:37:24,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 00:37:24,598 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 00:37:24,599 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-24 00:37:24,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:37:24 BoogieIcfgContainer [2020-10-24 00:37:24,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 00:37:24,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 00:37:24,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 00:37:24,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 00:37:24,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:37:23" (1/3) ... [2020-10-24 00:37:24,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7571642d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:37:24, skipping insertion in model container [2020-10-24 00:37:24,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:37:24" (2/3) ... [2020-10-24 00:37:24,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7571642d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:37:24, skipping insertion in model container [2020-10-24 00:37:24,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:37:24" (3/3) ... [2020-10-24 00:37:24,611 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-10-24 00:37:24,647 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 00:37:24,672 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 00:37:24,711 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 00:37:24,764 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 00:37:24,764 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 00:37:24,764 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 00:37:24,765 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 00:37:24,765 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 00:37:24,765 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 00:37:24,765 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 00:37:24,765 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 00:37:24,807 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-24 00:37:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-24 00:37:24,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:37:24,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:37:24,826 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:37:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:37:24,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1097920735, now seen corresponding path program 1 times [2020-10-24 00:37:24,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:37:24,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76610990] [2020-10-24 00:37:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:37:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:37:25,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 00:37:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:37:25,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-24 00:37:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:37:25,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-24 00:37:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 00:37:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 00:37:25,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76610990] [2020-10-24 00:37:25,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 00:37:25,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 00:37:25,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592918384] [2020-10-24 00:37:25,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 00:37:25,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 00:37:25,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 00:37:25,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-24 00:37:25,422 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 7 states. [2020-10-24 00:37:25,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 00:37:25,811 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-24 00:37:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 00:37:25,813 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-24 00:37:25,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 00:37:25,824 INFO L225 Difference]: With dead ends: 73 [2020-10-24 00:37:25,824 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 00:37:25,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-24 00:37:25,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 00:37:25,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-24 00:37:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-24 00:37:25,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-24 00:37:25,883 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 38 [2020-10-24 00:37:25,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 00:37:25,883 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-24 00:37:25,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 00:37:25,884 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-24 00:37:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-24 00:37:25,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 00:37:25,887 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 00:37:25,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 00:37:25,888 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 00:37:25,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 00:37:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1483482559, now seen corresponding path program 1 times [2020-10-24 00:37:25,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 00:37:25,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064303430] [2020-10-24 00:37:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 00:37:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 00:37:25,924 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 00:37:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 00:37:25,960 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 00:37:25,999 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 00:37:26,000 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 00:37:26,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 00:37:26,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:37:26 BoogieIcfgContainer [2020-10-24 00:37:26,053 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 00:37:26,056 INFO L168 Benchmark]: Toolchain (without parser) took 2084.39 ms. Allocated memory is still 152.0 MB. Free memory was 129.1 MB in the beginning and 104.5 MB in the end (delta: 24.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 8.0 GB. [2020-10-24 00:37:26,057 INFO L168 Benchmark]: CDTParser took 1.09 ms. Allocated memory is still 125.8 MB. Free memory was 102.5 MB in the beginning and 102.4 MB in the end (delta: 69.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 00:37:26,058 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.59 ms. Allocated memory is still 152.0 MB. Free memory was 128.5 MB in the beginning and 119.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 00:37:26,059 INFO L168 Benchmark]: Boogie Preprocessor took 36.10 ms. Allocated memory is still 152.0 MB. Free memory was 119.4 MB in the beginning and 118.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 00:37:26,060 INFO L168 Benchmark]: RCFGBuilder took 324.15 ms. Allocated memory is still 152.0 MB. Free memory was 118.1 MB in the beginning and 104.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-24 00:37:26,061 INFO L168 Benchmark]: TraceAbstraction took 1449.84 ms. Allocated memory is still 152.0 MB. Free memory was 103.9 MB in the beginning and 104.5 MB in the end (delta: -571.4 kB). Peak memory consumption was 415.6 kB. Max. memory is 8.0 GB. [2020-10-24 00:37:26,066 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.09 ms. Allocated memory is still 125.8 MB. Free memory was 102.5 MB in the beginning and 102.4 MB in the end (delta: 69.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 262.59 ms. Allocated memory is still 152.0 MB. Free memory was 128.5 MB in the beginning and 119.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.10 ms. Allocated memory is still 152.0 MB. Free memory was 119.4 MB in the beginning and 118.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 324.15 ms. Allocated memory is still 152.0 MB. Free memory was 118.1 MB in the beginning and 104.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1449.84 ms. Allocated memory is still 152.0 MB. Free memory was 103.9 MB in the beginning and 104.5 MB in the end (delta: -571.4 kB). Peak memory consumption was 415.6 kB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] int g; VAL [\old(g)=52, g=0] [L28] int g = __VERIFIER_nondet_int(); VAL [\old(g)=0, __VERIFIER_nondet_int()=6, g=6, g=0] [L29] int h = !g; VAL [\old(g)=0, g=0, g=6, h=0] [L30] CALL A(g,h) VAL [\old(a1)=6, \old(a2)=0, \old(g)=0, g=0] [L19] COND TRUE \read(a1) VAL [\old(a1)=6, \old(a2)=0, \old(g)=0, a1=6, a2=0, g=0] [L20] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=6, \old(g)=0, g=0] [L19] COND FALSE !(\read(a1)) VAL [\old(a1)=0, \old(a2)=6, \old(g)=0, a1=0, a2=6, g=0] [L22] g = a2 VAL [\old(a1)=0, \old(a2)=6, \old(g)=0, a1=0, a2=6, g=6] [L20] RET A(a2,a1) VAL [\old(a1)=6, \old(a2)=0, \old(g)=0, A(a2,a1)=-1, a1=6, a2=0, g=6] [L30] RET A(g,h) VAL [\old(g)=0, A(g,h)=-2, g=6, g=6, h=0] [L31] CALL A(g,h) VAL [\old(a1)=6, \old(a2)=0, \old(g)=6, g=6] [L19] COND TRUE \read(a1) VAL [\old(a1)=6, \old(a2)=0, \old(g)=6, a1=6, a2=0, g=6] [L20] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=6, \old(g)=6, g=6] [L19] COND FALSE !(\read(a1)) VAL [\old(a1)=0, \old(a2)=6, \old(g)=6, a1=0, a2=6, g=6] [L22] g = a2 VAL [\old(a1)=0, \old(a2)=6, \old(g)=6, a1=0, a2=6, g=6] [L20] RET A(a2,a1) VAL [\old(a1)=6, \old(a2)=0, \old(g)=6, A(a2,a1)=-3, a1=6, a2=0, g=6] [L31] RET A(g,h) VAL [\old(g)=0, A(g,h)=-4, g=6, g=6, h=0] [L32] COND TRUE \read(g) VAL [\old(g)=0, g=6, g=6, h=0] [L33] CALL reach_error() VAL [\old(g)=0, g=6] [L3] __assert_fail("0", "BallRajamani-SPIN2000-Fig1.c", 3, "reach_error") VAL [\old(g)=0, g=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 28 SDslu, 90 SDs, 0 SdLazy, 85 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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, 0.3s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 4884 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 0 PerfectInterpolantSequences, 1/6 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...