/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=DEEPEST --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/array-examples/standard_sentinel-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:30:39,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:30:39,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:30:39,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:30:39,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:30:39,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:30:39,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:30:39,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:30:39,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:30:39,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:30:39,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:30:39,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:30:39,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:30:39,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:30:39,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:30:39,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:30:39,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:30:39,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:30:39,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:30:39,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:30:39,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:30:39,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:30:39,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:30:39,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:30:39,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:30:39,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:30:39,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:30:39,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:30:39,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:30:39,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:30:39,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:30:39,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:30:39,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:30:39,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:30:39,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:30:39,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:30:39,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:30:39,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:30:39,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:30:39,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:30:39,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:30:39,206 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 14:30:39,260 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:30:39,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:30:39,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:30:39,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:30:39,266 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:30:39,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:30:39,266 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:30:39,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:30:39,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:30:39,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:30:39,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:30:39,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:30:39,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:30:39,269 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:30:39,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:30:39,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:30:39,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:30:39,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:30:39,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:30:39,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:30:39,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:30:39,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:30:39,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:30:39,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:30:39,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:30:39,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:30:39,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:30:39,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:30:39,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:30:39,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:30:39,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:30:39,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:30:39,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:30:39,765 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:30:39,765 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:30:39,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_sentinel-2.i [2020-10-27 14:30:39,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c21c86db9/feb02e8d37d045e1a47d37b53a97fe3c/FLAG9b67be8d9 [2020-10-27 14:30:40,636 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:30:40,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_sentinel-2.i [2020-10-27 14:30:40,647 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c21c86db9/feb02e8d37d045e1a47d37b53a97fe3c/FLAG9b67be8d9 [2020-10-27 14:30:40,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c21c86db9/feb02e8d37d045e1a47d37b53a97fe3c [2020-10-27 14:30:40,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:30:40,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:30:40,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:30:40,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:30:40,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:30:40,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:30:40" (1/1) ... [2020-10-27 14:30:40,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da745d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:40, skipping insertion in model container [2020-10-27 14:30:40,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:30:40" (1/1) ... [2020-10-27 14:30:40,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:30:41,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:30:41,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:30:41,206 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:30:41,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:30:41,250 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:30:41,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:41 WrapperNode [2020-10-27 14:30:41,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:30:41,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:30:41,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:30:41,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:30:41,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:41" (1/1) ... [2020-10-27 14:30:41,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:41" (1/1) ... [2020-10-27 14:30:41,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:41" (1/1) ... [2020-10-27 14:30:41,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:41" (1/1) ... [2020-10-27 14:30:41,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:41" (1/1) ... [2020-10-27 14:30:41,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:41" (1/1) ... [2020-10-27 14:30:41,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:41" (1/1) ... [2020-10-27 14:30:41,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:30:41,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:30:41,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:30:41,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:30:41,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:41" (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 14:30:41,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:30:41,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:30:41,378 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:30:41,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:30:41,378 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:30:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:30:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:30:41,379 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:30:41,379 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:30:41,379 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:30:41,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:30:41,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:30:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:30:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:30:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:30:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:30:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:30:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:30:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:30:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:30:41,683 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:30:41,684 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 14:30:41,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:30:41 BoogieIcfgContainer [2020-10-27 14:30:41,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:30:41,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:30:41,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:30:41,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:30:41,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:30:40" (1/3) ... [2020-10-27 14:30:41,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5bccbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:30:41, skipping insertion in model container [2020-10-27 14:30:41,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:30:41" (2/3) ... [2020-10-27 14:30:41,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5bccbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:30:41, skipping insertion in model container [2020-10-27 14:30:41,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:30:41" (3/3) ... [2020-10-27 14:30:41,695 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2020-10-27 14:30:41,709 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:30:41,733 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:30:41,750 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:30:41,795 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:30:41,795 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:30:41,796 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:30:41,796 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:30:41,796 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:30:41,796 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:30:41,796 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:30:41,796 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:30:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-27 14:30:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 14:30:41,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:41,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:41,826 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:41,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:41,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1039837916, now seen corresponding path program 1 times [2020-10-27 14:30:41,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:41,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747958603] [2020-10-27 14:30:41,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:42,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:42,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 14:30:42,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:30:42,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-27 14:30:42,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:42,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:42,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:30:42,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:42,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:30:42,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:42,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:42,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:42,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:42,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:42,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 14:30:42,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:42,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:42,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:42,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:42,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:42,775 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 14:30:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747958603] [2020-10-27 14:30:42,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:42,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:30:42,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167259711] [2020-10-27 14:30:42,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:30:42,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:42,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:30:42,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:30:42,815 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-27 14:30:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:42,931 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-10-27 14:30:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:30:42,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-27 14:30:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:42,943 INFO L225 Difference]: With dead ends: 45 [2020-10-27 14:30:42,944 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 14:30:42,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:30:42,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 14:30:43,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 14:30:43,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 14:30:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-27 14:30:43,008 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-27 14:30:43,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:43,008 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-27 14:30:43,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:30:43,009 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-27 14:30:43,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 14:30:43,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:43,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:43,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:30:43,010 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:43,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:43,011 INFO L82 PathProgramCache]: Analyzing trace with hash 971041850, now seen corresponding path program 1 times [2020-10-27 14:30:43,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:43,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233107517] [2020-10-27 14:30:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:43,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:43,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 14:30:43,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:30:43,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-27 14:30:43,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:43,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:30:43,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:30:43,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:30:43,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:30:43,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:43,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:43,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:43,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:43,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:30:43,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:43,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:43,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:43,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:43,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:43,401 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 14:30:43,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233107517] [2020-10-27 14:30:43,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:30:43,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 14:30:43,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087000002] [2020-10-27 14:30:43,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:30:43,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:43,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:30:43,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:30:43,406 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-10-27 14:30:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:43,533 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-10-27 14:30:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:30:43,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 14:30:43,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:43,535 INFO L225 Difference]: With dead ends: 27 [2020-10-27 14:30:43,535 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 14:30:43,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:30:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 14:30:43,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 14:30:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 14:30:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-27 14:30:43,544 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-10-27 14:30:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:43,544 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-27 14:30:43,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:30:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-27 14:30:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 14:30:43,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:43,546 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:43,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:30:43,546 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:43,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1663019583, now seen corresponding path program 1 times [2020-10-27 14:30:43,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:43,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981250362] [2020-10-27 14:30:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:43,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:43,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:43,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 14:30:43,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:30:43,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-27 14:30:43,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:43,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:30:43,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:30:43,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:30:43,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:44,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:44,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:44,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:44,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:44,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:44,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:30:44,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:44,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:44,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:44,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:44,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:44,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981250362] [2020-10-27 14:30:44,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:44,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:30:44,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350939733] [2020-10-27 14:30:44,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:30:44,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:44,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:30:44,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:30:44,030 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-27 14:30:44,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:44,194 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-10-27 14:30:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:30:44,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-27 14:30:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:44,196 INFO L225 Difference]: With dead ends: 29 [2020-10-27 14:30:44,196 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 14:30:44,197 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 14:30:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 14:30:44,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 14:30:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 14:30:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 14:30:44,205 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-27 14:30:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:44,205 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 14:30:44,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:30:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 14:30:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 14:30:44,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:30:44,207 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:30:44,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:30:44,208 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:30:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:30:44,209 INFO L82 PathProgramCache]: Analyzing trace with hash 933690116, now seen corresponding path program 2 times [2020-10-27 14:30:44,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:30:44,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584294081] [2020-10-27 14:30:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:30:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:44,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:44,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:44,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:44,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 14:30:44,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:30:44,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-27 14:30:44,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:44,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:30:44,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:30:44,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:30:44,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:44,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:30:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:30:44,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:30:44,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:30:44,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:30:44,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:30:44,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:30:44,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:30:44,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:30:44,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:30:44,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:30:44,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:30:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:30:44,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584294081] [2020-10-27 14:30:44,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:30:44,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:30:44,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950007681] [2020-10-27 14:30:44,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:30:44,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:30:44,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:30:44,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:30:44,823 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-10-27 14:30:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:30:45,085 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-10-27 14:30:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:30:45,086 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-27 14:30:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:30:45,086 INFO L225 Difference]: With dead ends: 22 [2020-10-27 14:30:45,086 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 14:30:45,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:30:45,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 14:30:45,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 14:30:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 14:30:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 14:30:45,089 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2020-10-27 14:30:45,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:30:45,089 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 14:30:45,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:30:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 14:30:45,090 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 14:30:45,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:30:45,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 14:30:45,277 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-27 14:30:45,278 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-27 14:30:45,278 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-27 14:30:45,278 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-27 14:30:45,278 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-27 14:30:45,279 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 14:30:45,279 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-27 14:30:45,279 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 14:30:45,279 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 14:30:45,279 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 14:30:45,280 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 14:30:45,280 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 14:30:45,280 INFO L274 CegarLoopResult]: For program point L25(lines 25 32) no Hoare annotation was computed. [2020-10-27 14:30:45,280 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 15 34) no Hoare annotation was computed. [2020-10-27 14:30:45,280 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 15 34) no Hoare annotation was computed. [2020-10-27 14:30:45,280 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 15 34) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-10-27 14:30:45,280 INFO L274 CegarLoopResult]: For program point L28-1(lines 28 30) no Hoare annotation was computed. [2020-10-27 14:30:45,281 INFO L270 CegarLoopResult]: At program point L28-3(lines 28 30) the Hoare annotation is: (and (<= main_~i~1 main_~pos~0) (= (select (select |#memory_int| |main_~#a~0.base|) (+ (* main_~pos~0 4) |main_~#a~0.offset|)) main_~marker~0)) [2020-10-27 14:30:45,281 INFO L270 CegarLoopResult]: At program point L28-4(lines 28 30) the Hoare annotation is: (<= main_~i~1 main_~pos~0) [2020-10-27 14:30:45,281 INFO L274 CegarLoopResult]: For program point L20-2(lines 20 23) no Hoare annotation was computed. [2020-10-27 14:30:45,281 INFO L277 CegarLoopResult]: At program point L20-3(lines 20 23) the Hoare annotation is: true [2020-10-27 14:30:45,281 INFO L274 CegarLoopResult]: For program point L20-4(lines 15 34) no Hoare annotation was computed. [2020-10-27 14:30:45,281 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 14) the Hoare annotation is: true [2020-10-27 14:30:45,281 INFO L274 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-10-27 14:30:45,282 INFO L270 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-27 14:30:45,282 INFO L274 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-10-27 14:30:45,282 INFO L274 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2020-10-27 14:30:45,282 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 14) no Hoare annotation was computed. [2020-10-27 14:30:45,295 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-27 14:30:45,300 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-27 14:30:45,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 02:30:45 BoogieIcfgContainer [2020-10-27 14:30:45,304 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 14:30:45,310 INFO L168 Benchmark]: Toolchain (without parser) took 4342.58 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 128.6 MB in the beginning and 68.9 MB in the end (delta: 59.7 MB). Peak memory consumption was 92.5 MB. Max. memory is 8.0 GB. [2020-10-27 14:30:45,312 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 125.8 MB. Free memory is still 100.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 14:30:45,315 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.24 ms. Allocated memory is still 153.1 MB. Free memory was 127.8 MB in the beginning and 118.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 14:30:45,317 INFO L168 Benchmark]: Boogie Preprocessor took 43.72 ms. Allocated memory is still 153.1 MB. Free memory was 118.5 MB in the beginning and 116.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 14:30:45,318 INFO L168 Benchmark]: RCFGBuilder took 388.54 ms. Allocated memory is still 153.1 MB. Free memory was 116.9 MB in the beginning and 102.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-27 14:30:45,326 INFO L168 Benchmark]: TraceAbstraction took 3617.25 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 102.3 MB in the beginning and 68.9 MB in the end (delta: 33.5 MB). Peak memory consumption was 66.3 MB. Max. memory is 8.0 GB. [2020-10-27 14:30:45,337 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 125.8 MB. Free memory is still 100.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.24 ms. Allocated memory is still 153.1 MB. Free memory was 127.8 MB in the beginning and 118.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.72 ms. Allocated memory is still 153.1 MB. Free memory was 118.5 MB in the beginning and 116.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 388.54 ms. Allocated memory is still 153.1 MB. Free memory was 116.9 MB in the beginning and 102.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3617.25 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 102.3 MB in the beginning and 68.9 MB in the end (delta: 33.5 MB). Peak memory consumption was 66.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 20]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant [2020-10-27 14:30:45,350 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-27 14:30:45,351 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: i <= pos && unknown-#memory_int-unknown[a][pos * 4 + a] == marker - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 22 SDslu, 134 SDs, 0 SdLazy, 160 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 19 PreInvPairs, 23 NumberOfFragments, 58 HoareAnnotationTreeSize, 19 FomulaSimplifications, 53 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 10 FomulaSimplificationsInter, 89 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 65 ConstructedInterpolants, 0 QuantifiedInterpolants, 5045 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/8 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...