/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/ldv-regression/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:14:46,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:14:46,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:14:46,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:14:46,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:14:46,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:14:46,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:14:46,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:14:46,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:14:46,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:14:46,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:14:46,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:14:46,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:14:46,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:14:46,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:14:46,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:14:46,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:14:46,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:14:46,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:14:46,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:14:46,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:14:46,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:14:46,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:14:46,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:14:46,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:14:46,906 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:14:46,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:14:46,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:14:46,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:14:46,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 01:14:46,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:14:46,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:14:46,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:14:46,926 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:14:46,953 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:14:46,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:14:46,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:14:46,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:14:46,956 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:14:46,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:14:46,956 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:14:46,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:14:46,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:14:46,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:14:46,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:14:46,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:14:46,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:14:46,958 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:14:46,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:14:46,958 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:14:46,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:14:46,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:14:46,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:14:46,959 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:14:46,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:14:46,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:14:46,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:14:46,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:14:46,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:14:46,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:14:46,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:14:46,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:14:46,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:14:46,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:14:47,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:14:47,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:14:47,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:14:47,375 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:14:47,376 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:14:47,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2020-10-27 01:14:47,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c502d27f/379170aa67ea4f3296ad27dfe0dda26a/FLAG5acb1ea21 [2020-10-27 01:14:48,045 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:14:48,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test29-1.c [2020-10-27 01:14:48,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c502d27f/379170aa67ea4f3296ad27dfe0dda26a/FLAG5acb1ea21 [2020-10-27 01:14:48,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0c502d27f/379170aa67ea4f3296ad27dfe0dda26a [2020-10-27 01:14:48,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:14:48,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:14:48,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:14:48,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:14:48,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:14:48,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:14:48" (1/1) ... [2020-10-27 01:14:48,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a8aad0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:48, skipping insertion in model container [2020-10-27 01:14:48,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:14:48" (1/1) ... [2020-10-27 01:14:48,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:14:48,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:14:48,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:14:48,663 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:14:48,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:14:48,696 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:14:48,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:48 WrapperNode [2020-10-27 01:14:48,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:14:48,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:14:48,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:14:48,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:14:48,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:48" (1/1) ... [2020-10-27 01:14:48,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:48" (1/1) ... [2020-10-27 01:14:48,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:48" (1/1) ... [2020-10-27 01:14:48,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:48" (1/1) ... [2020-10-27 01:14:48,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:48" (1/1) ... [2020-10-27 01:14:48,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:48" (1/1) ... [2020-10-27 01:14:48,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:48" (1/1) ... [2020-10-27 01:14:48,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:14:48,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:14:48,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:14:48,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:14:48,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-27 01:14:48,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:14:48,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:14:48,818 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:14:48,819 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:14:48,819 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:14:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:14:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:14:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:14:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:14:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:14:48,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:14:48,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:14:48,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:14:48,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:14:48,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:14:48,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:14:49,087 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:14:49,087 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 01:14:49,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:14:49 BoogieIcfgContainer [2020-10-27 01:14:49,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:14:49,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:14:49,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:14:49,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:14:49,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:14:48" (1/3) ... [2020-10-27 01:14:49,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25cdda0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:14:49, skipping insertion in model container [2020-10-27 01:14:49,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:48" (2/3) ... [2020-10-27 01:14:49,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25cdda0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:14:49, skipping insertion in model container [2020-10-27 01:14:49,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:14:49" (3/3) ... [2020-10-27 01:14:49,100 INFO L111 eAbstractionObserver]: Analyzing ICFG test29-1.c [2020-10-27 01:14:49,113 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:14:49,119 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:14:49,139 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:14:49,173 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:14:49,173 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:14:49,173 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:14:49,174 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:14:49,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:14:49,174 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:14:49,174 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:14:49,174 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:14:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 01:14:49,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:14:49,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:49,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:14:49,207 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:49,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1935478553, now seen corresponding path program 1 times [2020-10-27 01:14:49,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:49,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826696649] [2020-10-27 01:14:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:49,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:49,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:49,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:50,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:50,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:14:50,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:14:50,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-27 01:14:50,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:50,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:14:50,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:14:50,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:14:50,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:14:50,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:50,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:50,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:50,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:50,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:50,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:14:50,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:50,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:50,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:50,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:50,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:14:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:14:50,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826696649] [2020-10-27 01:14:50,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:14:50,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:14:50,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847892882] [2020-10-27 01:14:50,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:14:50,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:50,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:14:50,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:14:50,480 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 7 states. [2020-10-27 01:14:50,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:50,687 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-10-27 01:14:50,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:14:50,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-27 01:14:50,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:50,712 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:14:50,712 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 01:14:50,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:14:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 01:14:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 01:14:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:14:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-10-27 01:14:50,760 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 14 [2020-10-27 01:14:50,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:50,760 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-10-27 01:14:50,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:14:50,761 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-10-27 01:14:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:14:50,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:50,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:14:50,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:14:50,763 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:50,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:50,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1607400419, now seen corresponding path program 1 times [2020-10-27 01:14:50,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:50,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258016641] [2020-10-27 01:14:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:14:50,791 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:14:50,791 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:14:50,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:14:50,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:14:50 BoogieIcfgContainer [2020-10-27 01:14:50,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:14:50,817 INFO L168 Benchmark]: Toolchain (without parser) took 2390.77 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 51.1 MB in the end (delta: 75.1 MB). Peak memory consumption was 75.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:50,818 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory is still 80.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:14:50,819 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.91 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 116.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:50,820 INFO L168 Benchmark]: Boogie Preprocessor took 33.37 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:50,821 INFO L168 Benchmark]: RCFGBuilder took 356.95 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 100.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:50,822 INFO L168 Benchmark]: TraceAbstraction took 1722.92 ms. Allocated memory is still 151.0 MB. Free memory was 100.2 MB in the beginning and 51.1 MB in the end (delta: 49.2 MB). Peak memory consumption was 49.9 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:50,826 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory is still 80.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.91 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 116.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.37 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 114.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 356.95 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 100.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1722.92 ms. Allocated memory is still 151.0 MB. Free memory was 100.2 MB in the beginning and 51.1 MB in the end (delta: 49.2 MB). Peak memory consumption was 49.9 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: [L15] union dummy d1, d2; [L16] int n = __VERIFIER_nondet_int(); [L17] EXPR n ? &d1 : &d2 [L17] union dummy *pd = n ? &d1 : &d2; [L18] d1.a = __VERIFIER_nondet_int() [L19] COND FALSE !(pd == &d1) [L22] pd->b = 0 [L24] pd == &d2 && d1.a != 0 [L24] EXPR d1.a [L24] pd == &d2 && d1.a != 0 [L24] COND TRUE pd == &d2 && d1.a != 0 [L30] CALL reach_error() [L3] __assert_fail("0", "test29-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 18 SDslu, 39 SDs, 0 SdLazy, 60 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 728 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...