/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:25:33,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:25:33,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:25:33,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 00:25:33,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:25:33,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:25:33,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:25:33,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:25:33,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:25:33,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:25:33,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:25:33,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:25:33,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:25:33,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:25:33,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:25:33,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:25:33,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:25:33,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:25:33,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:25:33,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:25:33,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:25:33,251 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:25:33,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:25:33,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:25:33,253 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:25:33,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:25:33,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:25:33,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:25:33,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:25:33,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:25:33,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:25:33,255 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:25:33,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:25:33,255 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:25:33,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:25:33,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:25:33,256 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:25:33,256 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:25:33,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:25:33,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:25:33,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:25:33,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:25:33,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:25:33,257 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:25:33,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:25:33,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:25:33,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:25:33,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:25:33,663 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:25:33,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-11-07 00:25:33,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0abce270f/3e12b0f2c4794287932231f0b97a6078/FLAGb3dd17358 [2020-11-07 00:25:34,280 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:25:34,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-11-07 00:25:34,289 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0abce270f/3e12b0f2c4794287932231f0b97a6078/FLAGb3dd17358 [2020-11-07 00:25:34,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0abce270f/3e12b0f2c4794287932231f0b97a6078 [2020-11-07 00:25:34,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:25:34,680 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:25:34,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:34,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:25:34,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:25:34,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:34" (1/1) ... [2020-11-07 00:25:34,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d4b374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:34, skipping insertion in model container [2020-11-07 00:25:34,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:34" (1/1) ... [2020-11-07 00:25:34,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:25:34,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:25:34,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:34,932 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:25:34,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:34,963 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:25:34,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:34 WrapperNode [2020-11-07 00:25:34,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:34,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:25:34,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:25:34,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:25:34,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:34" (1/1) ... [2020-11-07 00:25:34,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:34" (1/1) ... [2020-11-07 00:25:34,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:34" (1/1) ... [2020-11-07 00:25:34,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:34" (1/1) ... [2020-11-07 00:25:34,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:34" (1/1) ... [2020-11-07 00:25:34,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:34" (1/1) ... [2020-11-07 00:25:34,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:34" (1/1) ... [2020-11-07 00:25:34,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:25:34,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:25:34,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:25:34,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:25:34,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:34" (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 [2020-11-07 00:25:35,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:25:35,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:25:35,120 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:25:35,120 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-11-07 00:25:35,120 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:25:35,120 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:25:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:25:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:25:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:25:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:25:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-11-07 00:25:35,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:25:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:25:35,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:25:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:25:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:25:35,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:25:35,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:25:35,664 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:25:35,664 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 00:25:35,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:35 BoogieIcfgContainer [2020-11-07 00:25:35,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:25:35,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:25:35,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:25:35,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:25:35,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:25:34" (1/3) ... [2020-11-07 00:25:35,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e5e272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:35, skipping insertion in model container [2020-11-07 00:25:35,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:34" (2/3) ... [2020-11-07 00:25:35,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e5e272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:35, skipping insertion in model container [2020-11-07 00:25:35,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:35" (3/3) ... [2020-11-07 00:25:35,683 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-11-07 00:25:35,701 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:25:35,705 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:25:35,723 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:25:35,760 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:25:35,760 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:25:35,761 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:25:35,761 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:25:35,761 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:25:35,761 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:25:35,761 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:25:35,761 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:25:35,782 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-11-07 00:25:35,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-07 00:25:35,797 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:35,799 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] [2020-11-07 00:25:35,799 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:35,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1097920735, now seen corresponding path program 1 times [2020-11-07 00:25:35,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:35,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901601103] [2020-11-07 00:25:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:35,886 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-07 00:25:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-07 00:25:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-07 00:25:36,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901601103] [2020-11-07 00:25:36,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:36,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:25:36,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712055408] [2020-11-07 00:25:36,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:25:36,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:36,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:25:36,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:25:36,306 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 7 states. [2020-11-07 00:25:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:36,784 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-11-07 00:25:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-07 00:25:36,786 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-11-07 00:25:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:36,797 INFO L225 Difference]: With dead ends: 73 [2020-11-07 00:25:36,798 INFO L226 Difference]: Without dead ends: 38 [2020-11-07 00:25:36,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-07 00:25:36,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-07 00:25:36,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-07 00:25:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-07 00:25:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-11-07 00:25:36,861 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 38 [2020-11-07 00:25:36,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:36,862 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-11-07 00:25:36,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:25:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-11-07 00:25:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-07 00:25:36,865 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:36,866 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] [2020-11-07 00:25:36,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:25:36,866 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:36,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:36,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1483482559, now seen corresponding path program 1 times [2020-11-07 00:25:36,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:36,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327023265] [2020-11-07 00:25:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:36,872 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:25:36,905 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:25:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:25:36,937 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:25:36,986 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:25:36,986 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:25:36,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:25:37,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:25:37 BoogieIcfgContainer [2020-11-07 00:25:37,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:25:37,008 INFO L168 Benchmark]: Toolchain (without parser) took 2355.04 ms. Allocated memory was 153.1 MB in the beginning and 191.9 MB in the end (delta: 38.8 MB). Free memory was 109.1 MB in the beginning and 128.7 MB in the end (delta: -19.6 MB). Peak memory consumption was 19.7 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:37,009 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 153.1 MB. Free memory was 126.0 MB in the beginning and 125.9 MB in the end (delta: 80.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:25:37,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.99 ms. Allocated memory is still 153.1 MB. Free memory was 136.9 MB in the beginning and 127.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:37,011 INFO L168 Benchmark]: Boogie Preprocessor took 30.07 ms. Allocated memory is still 153.1 MB. Free memory was 127.9 MB in the beginning and 126.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:37,012 INFO L168 Benchmark]: RCFGBuilder took 674.42 ms. Allocated memory is still 153.1 MB. Free memory was 125.9 MB in the beginning and 123.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:37,013 INFO L168 Benchmark]: TraceAbstraction took 1330.86 ms. Allocated memory was 153.1 MB in the beginning and 191.9 MB in the end (delta: 38.8 MB). Free memory was 123.0 MB in the beginning and 128.7 MB in the end (delta: -5.7 MB). Peak memory consumption was 34.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:37,017 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 153.1 MB. Free memory was 126.0 MB in the beginning and 125.9 MB in the end (delta: 80.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.99 ms. Allocated memory is still 153.1 MB. Free memory was 136.9 MB in the beginning and 127.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.07 ms. Allocated memory is still 153.1 MB. Free memory was 127.9 MB in the beginning and 126.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 674.42 ms. Allocated memory is still 153.1 MB. Free memory was 125.9 MB in the beginning and 123.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1330.86 ms. Allocated memory was 153.1 MB in the beginning and 191.9 MB in the end (delta: 38.8 MB). Free memory was 123.0 MB in the beginning and 128.7 MB in the end (delta: -5.7 MB). Peak memory consumption was 34.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] int g; [L28] int g = __VERIFIER_nondet_int(); [L29] int h = !g; [L30] CALL A(g,h) [L19] COND TRUE \read(a1) [L20] CALL A(a2,a1) [L19] COND FALSE !(\read(a1)) [L22] g = a2 [L20] RET A(a2,a1) [L30] RET A(g,h) [L31] CALL A(g,h) [L19] COND TRUE \read(a1) [L20] CALL A(a2,a1) [L19] COND FALSE !(\read(a1)) [L22] g = a2 [L20] RET A(a2,a1) [L31] RET A(g,h) [L32] COND TRUE \read(g) [L33] CALL reach_error() [L3] __assert_fail("0", "BallRajamani-SPIN2000-Fig1.c", 3, "reach_error") - 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: 0.5s, 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, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s 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: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...