/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:43:58,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:43:58,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:43:58,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:43:58,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:43:58,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:43:58,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:43:58,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:43:58,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:43:58,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:43:58,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:43:58,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:43:58,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:43:58,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:43:58,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:43:58,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:43:58,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:43:58,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:43:58,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:43:58,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:43:58,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:43:58,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:43:58,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:43:58,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:43:58,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:43:58,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:43:58,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:43:58,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:43:58,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:43:58,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 22:43:58,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:43:58,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:43:58,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:43:58,400 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 [2020-09-24 22:43:58,454 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:43:58,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:43:58,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:43:58,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:43:58,458 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:43:58,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:43:58,459 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:43:58,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:43:58,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:43:58,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:43:58,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:43:58,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:43:58,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:43:58,462 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:43:58,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:43:58,462 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:43:58,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:43:58,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:43:58,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:43:58,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:43:58,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:43:58,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:43:58,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:43:58,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:43:58,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:43:58,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:43:58,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:43:58,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:43:58,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:43:58,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=HIGHLEXORDER;log-additional-information=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=HIGHLEXORDER;log-additional-information=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=HIGHLEXORDER;log-additional-information=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=HIGHLEXORDER;log-additional-information=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=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:43:58,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:43:58,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:43:58,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:43:58,960 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:43:58,960 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:43:58,961 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test08.c [2020-09-24 22:43:59,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77c6e2e58/9366c6ea866144fda88b0f7e14dbf6fe/FLAG13850ec79 [2020-09-24 22:43:59,645 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:43:59,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test08.c [2020-09-24 22:43:59,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77c6e2e58/9366c6ea866144fda88b0f7e14dbf6fe/FLAG13850ec79 [2020-09-24 22:43:59,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77c6e2e58/9366c6ea866144fda88b0f7e14dbf6fe [2020-09-24 22:43:59,986 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:43:59,993 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:43:59,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:43:59,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:43:59,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:44:00,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:43:59" (1/1) ... [2020-09-24 22:44:00,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dbfc66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:00, skipping insertion in model container [2020-09-24 22:44:00,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:43:59" (1/1) ... [2020-09-24 22:44:00,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:44:00,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:44:00,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:44:00,325 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:44:00,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:44:00,374 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:44:00,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:00 WrapperNode [2020-09-24 22:44:00,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:44:00,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:44:00,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:44:00,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:44:00,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:00" (1/1) ... [2020-09-24 22:44:00,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:00" (1/1) ... [2020-09-24 22:44:00,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:00" (1/1) ... [2020-09-24 22:44:00,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:00" (1/1) ... [2020-09-24 22:44:00,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:00" (1/1) ... [2020-09-24 22:44:00,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:00" (1/1) ... [2020-09-24 22:44:00,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:00" (1/1) ... [2020-09-24 22:44:00,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:44:00,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:44:00,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:44:00,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:44:00,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:00" (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 [2020-09-24 22:44:00,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:44:00,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:44:00,626 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-09-24 22:44:00,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:44:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:44:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-09-24 22:44:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 22:44:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:44:00,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 22:44:00,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:44:00,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 22:44:00,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 22:44:00,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:44:00,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 22:44:00,904 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:44:00,905 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 22:44:00,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:44:00 BoogieIcfgContainer [2020-09-24 22:44:00,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:44:00,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:44:00,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:44:00,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:44:00,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:43:59" (1/3) ... [2020-09-24 22:44:00,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d4b475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:44:00, skipping insertion in model container [2020-09-24 22:44:00,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:00" (2/3) ... [2020-09-24 22:44:00,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d4b475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:44:00, skipping insertion in model container [2020-09-24 22:44:00,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:44:00" (3/3) ... [2020-09-24 22:44:00,932 INFO L109 eAbstractionObserver]: Analyzing ICFG test08.c [2020-09-24 22:44:00,957 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:44:00,978 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:44:01,006 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:44:01,067 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:44:01,068 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:44:01,068 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:44:01,068 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:44:01,068 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:44:01,068 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:44:01,068 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:44:01,069 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:44:01,094 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-09-24 22:44:01,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 22:44:01,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:01,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:01,104 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:01,113 INFO L82 PathProgramCache]: Analyzing trace with hash 56438835, now seen corresponding path program 1 times [2020-09-24 22:44:01,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:01,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665366006] [2020-09-24 22:44:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:01,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:01,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:02,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:03,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:03,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 22:44:03,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 22:44:03,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2337 [2020-09-24 22:44:03,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:03,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 22:44:03,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-24 22:44:03,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 22:44:03,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 22:44:03,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:03,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:03,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:03,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 22:44:03,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:03,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 22:44:03,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:03,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:03,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:03,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:03,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:03,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 22:44:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:03,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:03,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:03,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 22:44:03,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:03,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 22:44:03,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:03,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 22:44:03,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:03,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 22:44:03,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:03,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665366006] [2020-09-24 22:44:03,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:44:03,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 22:44:04,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089688410] [2020-09-24 22:44:04,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 22:44:04,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:04,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 22:44:04,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 22:44:04,042 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 8 states. [2020-09-24 22:44:04,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:04,531 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-09-24 22:44:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 22:44:04,533 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-09-24 22:44:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:04,548 INFO L225 Difference]: With dead ends: 71 [2020-09-24 22:44:04,548 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 22:44:04,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-24 22:44:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 22:44:04,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-24 22:44:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 22:44:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 42 transitions. [2020-09-24 22:44:04,610 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 42 transitions. Word has length 41 [2020-09-24 22:44:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:04,611 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 42 transitions. [2020-09-24 22:44:04,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 22:44:04,611 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 42 transitions. [2020-09-24 22:44:04,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 22:44:04,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:04,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:04,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:44:04,614 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:04,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:04,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1088655632, now seen corresponding path program 1 times [2020-09-24 22:44:04,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:04,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389231499] [2020-09-24 22:44:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 22:44:04,637 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 22:44:04,637 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 22:44:04,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:44:04,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 10:44:04 BoogieIcfgContainer [2020-09-24 22:44:04,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 22:44:04,675 INFO L168 Benchmark]: Toolchain (without parser) took 4685.39 ms. Allocated memory was 140.0 MB in the beginning and 244.8 MB in the end (delta: 104.9 MB). Free memory was 102.3 MB in the beginning and 191.4 MB in the end (delta: -89.1 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2020-09-24 22:44:04,676 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-24 22:44:04,677 INFO L168 Benchmark]: CACSL2BoogieTranslator took 382.16 ms. Allocated memory is still 140.0 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-24 22:44:04,678 INFO L168 Benchmark]: Boogie Preprocessor took 150.53 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 181.5 MB in the end (delta: -89.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-24 22:44:04,679 INFO L168 Benchmark]: RCFGBuilder took 383.96 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 164.6 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-09-24 22:44:04,680 INFO L168 Benchmark]: TraceAbstraction took 3757.13 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 164.6 MB in the beginning and 191.4 MB in the end (delta: -26.8 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-09-24 22:44:04,685 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 382.16 ms. Allocated memory is still 140.0 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.53 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 181.5 MB in the end (delta: -89.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 383.96 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 164.6 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3757.13 ms. Allocated memory was 203.4 MB in the beginning and 244.8 MB in the end (delta: 41.4 MB). Free memory was 164.6 MB in the beginning and 191.4 MB in the end (delta: -26.8 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 36]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int a, b; [L5] int *p1, *p2; [L19] p1 = &a [L20] p2 = &b [L22] b = 1 [L23] a = 5 [L25] EXPR \read(a) [L25] a-- [L27] CALL, EXPR f() [L8] EXPR \read(*p1) [L8] EXPR \read(*p2) [L8] EXPR \read(a) [L8] int v = *p1 + *p2 - a; [L9] COND TRUE v == 1 [L10] p1 = p2 [L11] return v; [L27] RET, EXPR f() [L27] a = f() [L29] EXPR \read(a) [L29] COND TRUE a && p1 == p2 [L36] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 39 SDtfs, 35 SDslu, 130 SDs, 0 SdLazy, 137 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred 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, 2.6s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 4160 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...