/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=SHALLOWEST --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/test20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 23:51:28,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 23:51:28,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 23:51:28,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 23:51:28,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 23:51:28,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 23:51:28,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 23:51:28,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 23:51:28,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 23:51:28,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 23:51:28,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 23:51:28,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 23:51:28,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 23:51:28,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 23:51:28,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 23:51:28,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 23:51:28,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 23:51:28,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 23:51:28,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 23:51:28,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 23:51:28,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 23:51:28,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 23:51:28,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 23:51:28,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 23:51:28,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 23:51:28,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 23:51:28,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 23:51:28,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 23:51:28,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 23:51:28,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 23:51:28,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 23:51:28,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 23:51:28,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 23:51:28,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 23:51:28,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 23:51:28,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 23:51:28,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 23:51:28,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 23:51:28,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 23:51:28,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 23:51:28,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 23:51:28,141 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 23:51:28,168 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 23:51:28,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 23:51:28,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 23:51:28,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 23:51:28,170 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 23:51:28,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 23:51:28,171 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 23:51:28,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 23:51:28,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 23:51:28,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 23:51:28,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 23:51:28,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 23:51:28,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 23:51:28,172 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 23:51:28,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 23:51:28,172 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 23:51:28,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 23:51:28,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 23:51:28,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 23:51:28,173 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 23:51:28,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 23:51:28,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 23:51:28,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 23:51:28,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 23:51:28,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 23:51:28,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 23:51:28,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 23:51:28,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 23:51:28,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 23:51:28,176 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-24 23:51:28,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 23:51:28,706 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 23:51:28,711 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 23:51:28,713 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 23:51:28,713 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 23:51:28,714 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test20.c [2020-09-24 23:51:28,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72dfabd50/298ff793aeb947dabf9a72ea59ba66a6/FLAG214240a89 [2020-09-24 23:51:29,370 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 23:51:29,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test20.c [2020-09-24 23:51:29,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72dfabd50/298ff793aeb947dabf9a72ea59ba66a6/FLAG214240a89 [2020-09-24 23:51:29,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72dfabd50/298ff793aeb947dabf9a72ea59ba66a6 [2020-09-24 23:51:29,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 23:51:29,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 23:51:29,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 23:51:29,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 23:51:29,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 23:51:29,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:51:29" (1/1) ... [2020-09-24 23:51:29,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cc40f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:29, skipping insertion in model container [2020-09-24 23:51:29,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:51:29" (1/1) ... [2020-09-24 23:51:29,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 23:51:29,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 23:51:29,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:51:29,988 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 23:51:30,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:51:30,029 INFO L208 MainTranslator]: Completed translation [2020-09-24 23:51:30,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:30 WrapperNode [2020-09-24 23:51:30,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 23:51:30,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 23:51:30,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 23:51:30,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 23:51:30,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:30" (1/1) ... [2020-09-24 23:51:30,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:30" (1/1) ... [2020-09-24 23:51:30,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:30" (1/1) ... [2020-09-24 23:51:30,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:30" (1/1) ... [2020-09-24 23:51:30,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:30" (1/1) ... [2020-09-24 23:51:30,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:30" (1/1) ... [2020-09-24 23:51:30,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:30" (1/1) ... [2020-09-24 23:51:30,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 23:51:30,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 23:51:30,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 23:51:30,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 23:51:30,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:30" (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 23:51:30,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 23:51:30,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 23:51:30,227 INFO L138 BoogieDeclarations]: Found implementation of procedure equal [2020-09-24 23:51:30,227 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 23:51:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 23:51:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure equal [2020-09-24 23:51:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 23:51:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 23:51:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 23:51:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 23:51:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 23:51:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 23:51:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 23:51:30,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 23:51:30,458 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 23:51:30,459 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 23:51:30,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:51:30 BoogieIcfgContainer [2020-09-24 23:51:30,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 23:51:30,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 23:51:30,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 23:51:30,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 23:51:30,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:51:29" (1/3) ... [2020-09-24 23:51:30,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2209cad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:51:30, skipping insertion in model container [2020-09-24 23:51:30,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:30" (2/3) ... [2020-09-24 23:51:30,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2209cad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:51:30, skipping insertion in model container [2020-09-24 23:51:30,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:51:30" (3/3) ... [2020-09-24 23:51:30,477 INFO L109 eAbstractionObserver]: Analyzing ICFG test20.c [2020-09-24 23:51:30,492 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 23:51:30,503 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 23:51:30,543 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 23:51:30,577 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 23:51:30,577 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 23:51:30,577 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 23:51:30,577 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 23:51:30,577 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 23:51:30,578 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 23:51:30,578 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 23:51:30,578 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 23:51:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-24 23:51:30,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 23:51:30,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:30,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:30,614 INFO L427 AbstractCegarLoop]: === Iteration 1 === [equalErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:30,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:30,624 INFO L82 PathProgramCache]: Analyzing trace with hash 923328836, now seen corresponding path program 1 times [2020-09-24 23:51:30,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:30,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153347209] [2020-09-24 23:51:30,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:30,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:31,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:31,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 23:51:31,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:31,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 326 [2020-09-24 23:51:31,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:31,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:51:31,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-24 23:51:31,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 23:51:31,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 23:51:31,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:31,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:31,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:31,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 23:51:31,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:31,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-24 23:51:31,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 23:51:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:31,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 23:51:31,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:31,426 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 23:51:31,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153347209] [2020-09-24 23:51:31,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:51:31,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 23:51:31,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845689365] [2020-09-24 23:51:31,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 23:51:31,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:31,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 23:51:31,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 23:51:31,464 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 8 states. [2020-09-24 23:51:31,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:31,844 INFO L93 Difference]: Finished difference Result 31 states and 30 transitions. [2020-09-24 23:51:31,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 23:51:31,847 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-09-24 23:51:31,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:31,856 INFO L225 Difference]: With dead ends: 31 [2020-09-24 23:51:31,857 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 23:51:31,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-24 23:51:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 23:51:31,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 23:51:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 23:51:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 23:51:31,890 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-09-24 23:51:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:31,891 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 23:51:31,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 23:51:31,891 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 23:51:31,891 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 23:51:31,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 23:51:31,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 23:51:32,008 INFO L268 CegarLoopResult]: For program point equalEXIT(lines 4 12) no Hoare annotation was computed. [2020-09-24 23:51:32,008 INFO L271 CegarLoopResult]: At program point equalENTRY(lines 4 12) the Hoare annotation is: true [2020-09-24 23:51:32,009 INFO L268 CegarLoopResult]: For program point equalFINAL(lines 4 12) no Hoare annotation was computed. [2020-09-24 23:51:32,009 INFO L264 CegarLoopResult]: At program point L6(lines 4 12) the Hoare annotation is: (or (= |equal_#in~a.base| |equal_#in~b.base|) (= |~#a~0.base| |~#b~0.base|) (not (= (select |#valid| |~#a~0.base|) 1))) [2020-09-24 23:51:32,009 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-09-24 23:51:32,009 INFO L268 CegarLoopResult]: For program point equalErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2020-09-24 23:51:32,010 INFO L268 CegarLoopResult]: For program point L4(lines 4 12) no Hoare annotation was computed. [2020-09-24 23:51:32,010 INFO L268 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-09-24 23:51:32,010 INFO L268 CegarLoopResult]: For program point L-1-1(line -1) no Hoare annotation was computed. [2020-09-24 23:51:32,010 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-24 23:51:32,010 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line 14) no Hoare annotation was computed. [2020-09-24 23:51:32,010 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-09-24 23:51:32,011 INFO L268 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-09-24 23:51:32,011 INFO L268 CegarLoopResult]: For program point L14-3(line 14) no Hoare annotation was computed. [2020-09-24 23:51:32,011 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#b~0.offset| |old(~#b~0.offset)|) (= |old(#length)| |#length|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |~#a~0.base| |old(~#a~0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-24 23:51:32,011 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 23:51:32,011 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 23:51:32,012 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (= (select |#valid| |~#a~0.base|) 1) (not (= |~#b~0.base| |~#a~0.base|))) [2020-09-24 23:51:32,012 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 23:51:32,012 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 23:51:32,012 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-24 23:51:32,012 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 16 19) the Hoare annotation is: true [2020-09-24 23:51:32,013 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 19) no Hoare annotation was computed. [2020-09-24 23:51:32,013 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 19) no Hoare annotation was computed. [2020-09-24 23:51:32,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 11:51:32 BoogieIcfgContainer [2020-09-24 23:51:32,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 23:51:32,040 INFO L168 Benchmark]: Toolchain (without parser) took 2331.09 ms. Allocated memory was 137.4 MB in the beginning and 229.1 MB in the end (delta: 91.8 MB). Free memory was 100.6 MB in the beginning and 194.9 MB in the end (delta: -94.2 MB). Peak memory consumption was 88.2 MB. Max. memory is 7.1 GB. [2020-09-24 23:51:32,041 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 23:51:32,042 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.81 ms. Allocated memory is still 137.4 MB. Free memory was 100.0 MB in the beginning and 90.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-24 23:51:32,044 INFO L168 Benchmark]: Boogie Preprocessor took 115.12 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 90.6 MB in the beginning and 178.6 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-24 23:51:32,045 INFO L168 Benchmark]: RCFGBuilder took 320.30 ms. Allocated memory is still 200.3 MB. Free memory was 178.6 MB in the beginning and 164.9 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-24 23:51:32,046 INFO L168 Benchmark]: TraceAbstraction took 1568.33 ms. Allocated memory was 200.3 MB in the beginning and 229.1 MB in the end (delta: 28.8 MB). Free memory was 164.2 MB in the beginning and 194.9 MB in the end (delta: -30.7 MB). Peak memory consumption was 88.9 MB. Max. memory is 7.1 GB. [2020-09-24 23:51:32,051 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 316.81 ms. Allocated memory is still 137.4 MB. Free memory was 100.0 MB in the beginning and 90.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.12 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 90.6 MB in the beginning and 178.6 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 320.30 ms. Allocated memory is still 200.3 MB. Free memory was 178.6 MB in the beginning and 164.9 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1568.33 ms. Allocated memory was 200.3 MB in the beginning and 229.1 MB in the end (delta: 28.8 MB). Free memory was 164.2 MB in the beginning and 194.9 MB in the end (delta: -30.7 MB). Peak memory consumption was 88.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 4]: Loop Invariant Derived loop invariant: (a == b || a == b) || !(\valid[a] == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 31 SDslu, 38 SDs, 0 SdLazy, 42 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 6 NumberOfFragments, 51 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 93 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 1065 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 correct! Received shutdown request...