/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/loop-acceleration/simple_3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:13:51,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:13:51,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:13:51,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:13:51,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:13:51,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:13:51,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:13:51,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:13:51,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:13:51,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:13:51,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:13:51,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:13:51,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:13:51,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:13:51,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:13:51,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:13:51,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:13:51,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:13:51,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:13:51,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:13:51,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:13:51,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:13:51,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:13:51,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:13:51,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:13:51,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:13:51,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:13:51,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:13:51,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:13:51,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:13:51,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:13:51,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:13:51,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:13:51,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:13:51,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:13:51,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:13:51,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:13:51,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:13:51,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:13:51,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:13:51,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:13:51,111 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 20:13:51,146 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:13:51,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:13:51,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:13:51,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:13:51,150 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:13:51,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:13:51,151 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:13:51,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:13:51,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:13:51,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:13:51,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:13:51,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:13:51,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:13:51,155 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:13:51,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:13:51,155 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:13:51,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:13:51,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:13:51,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:13:51,157 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:13:51,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:13:51,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:13:51,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:13:51,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:13:51,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:13:51,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:13:51,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:13:51,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:13:51,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:13:51,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:13:51,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:13:51,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:13:51,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:13:51,629 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:13:51,630 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:13:51,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_3-2.c [2020-10-27 20:13:51,721 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d09135cf6/55fc6d07e6cf4a3893adab69dcfe8832/FLAG78ad0c7ef [2020-10-27 20:13:52,282 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:13:52,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_3-2.c [2020-10-27 20:13:52,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d09135cf6/55fc6d07e6cf4a3893adab69dcfe8832/FLAG78ad0c7ef [2020-10-27 20:13:52,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d09135cf6/55fc6d07e6cf4a3893adab69dcfe8832 [2020-10-27 20:13:52,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:13:52,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:13:52,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:13:52,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:13:52,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:13:52,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:13:52" (1/1) ... [2020-10-27 20:13:52,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89b4149 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:52, skipping insertion in model container [2020-10-27 20:13:52,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:13:52" (1/1) ... [2020-10-27 20:13:52,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:13:52,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:13:52,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:13:52,937 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:13:52,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:13:52,975 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:13:52,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:52 WrapperNode [2020-10-27 20:13:52,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:13:52,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:13:52,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:13:52,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:13:52,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:52" (1/1) ... [2020-10-27 20:13:52,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:52" (1/1) ... [2020-10-27 20:13:53,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:52" (1/1) ... [2020-10-27 20:13:53,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:52" (1/1) ... [2020-10-27 20:13:53,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:52" (1/1) ... [2020-10-27 20:13:53,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:52" (1/1) ... [2020-10-27 20:13:53,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:52" (1/1) ... [2020-10-27 20:13:53,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:13:53,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:13:53,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:13:53,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:13:53,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:52" (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 20:13:53,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:13:53,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:13:53,125 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:13:53,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:13:53,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:13:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:13:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:13:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:13:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:13:53,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2020-10-27 20:13:53,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:13:53,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:13:53,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:13:53,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:13:53,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:13:53,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:13:53,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:13:53,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:13:53,592 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:13:53,592 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:13:53,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:13:53 BoogieIcfgContainer [2020-10-27 20:13:53,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:13:53,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:13:53,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:13:53,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:13:53,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:13:52" (1/3) ... [2020-10-27 20:13:53,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328948d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:13:53, skipping insertion in model container [2020-10-27 20:13:53,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:13:52" (2/3) ... [2020-10-27 20:13:53,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328948d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:13:53, skipping insertion in model container [2020-10-27 20:13:53,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:13:53" (3/3) ... [2020-10-27 20:13:53,614 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_3-2.c [2020-10-27 20:13:53,626 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:13:53,636 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:13:53,650 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:13:53,685 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:13:53,685 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:13:53,685 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:13:53,685 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:13:53,685 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:13:53,685 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:13:53,686 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:13:53,686 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:13:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 20:13:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:13:53,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:13:53,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:13:53,721 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:13:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:13:53,728 INFO L82 PathProgramCache]: Analyzing trace with hash 671356177, now seen corresponding path program 1 times [2020-10-27 20:13:53,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:13:53,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081751732] [2020-10-27 20:13:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:13:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:53,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:54,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:54,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:13:54,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:54,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-27 20:13:54,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:54,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:13:54,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:13:54,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:13:54,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:13:54,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:13:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:13:54,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:13:54,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:13:54,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:13:54,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:13:54,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:13:54,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:13:54,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:13:54,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:13:54,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:13:54,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:13:54,410 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 20:13:54,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081751732] [2020-10-27 20:13:54,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:13:54,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:13:54,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538512547] [2020-10-27 20:13:54,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:13:54,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:13:54,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:13:54,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:13:54,437 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-10-27 20:13:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:13:54,696 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-10-27 20:13:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:13:54,698 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 20:13:54,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:13:54,704 INFO L225 Difference]: With dead ends: 31 [2020-10-27 20:13:54,705 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 20:13:54,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:13:54,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 20:13:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 20:13:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 20:13:54,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 20:13:54,735 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-10-27 20:13:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:13:54,736 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 20:13:54,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:13:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 20:13:54,736 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 20:13:54,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:13:54,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 20:13:54,898 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 20:13:54,899 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 20:13:54,899 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 20:13:54,899 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 20:13:54,899 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:13:54,900 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-27 20:13:54,900 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:13:54,900 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:13:54,900 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 20:13:54,900 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 20:13:54,900 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:13:54,901 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2020-10-27 20:13:54,901 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 13 22) no Hoare annotation was computed. [2020-10-27 20:13:54,901 INFO L270 CegarLoopResult]: At program point L17-2(lines 17 19) the Hoare annotation is: (and (<= main_~x~0 (* 2 (div main_~x~0 2))) (<= 0 main_~x~0)) [2020-10-27 20:13:54,901 INFO L270 CegarLoopResult]: At program point L17-3(lines 17 19) the Hoare annotation is: (and (<= main_~x~0 (* 2 (div main_~x~0 2))) (<= 0 main_~x~0)) [2020-10-27 20:13:54,902 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 13 22) no Hoare annotation was computed. [2020-10-27 20:13:54,902 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-10-27 20:13:54,902 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-27 20:13:54,902 INFO L270 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-10-27 20:13:54,902 INFO L274 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-27 20:13:54,903 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-10-27 20:13:54,903 INFO L274 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-10-27 20:13:54,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:13:54 BoogieIcfgContainer [2020-10-27 20:13:54,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:13:54,921 INFO L168 Benchmark]: Toolchain (without parser) took 2286.49 ms. Allocated memory is still 154.1 MB. Free memory was 128.7 MB in the beginning and 62.5 MB in the end (delta: 66.2 MB). Peak memory consumption was 67.8 MB. Max. memory is 8.0 GB. [2020-10-27 20:13:54,922 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 154.1 MB. Free memory is still 126.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:13:54,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.96 ms. Allocated memory is still 154.1 MB. Free memory was 128.0 MB in the beginning and 119.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:13:54,924 INFO L168 Benchmark]: Boogie Preprocessor took 58.27 ms. Allocated memory is still 154.1 MB. Free memory was 119.0 MB in the beginning and 117.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:13:54,926 INFO L168 Benchmark]: RCFGBuilder took 555.22 ms. Allocated memory is still 154.1 MB. Free memory was 117.5 MB in the beginning and 105.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:13:54,927 INFO L168 Benchmark]: TraceAbstraction took 1322.97 ms. Allocated memory is still 154.1 MB. Free memory was 104.9 MB in the beginning and 62.5 MB in the end (delta: 42.5 MB). Peak memory consumption was 43.7 MB. Max. memory is 8.0 GB. [2020-10-27 20:13:54,931 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 154.1 MB. Free memory is still 126.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 336.96 ms. Allocated memory is still 154.1 MB. Free memory was 128.0 MB in the beginning and 119.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.27 ms. Allocated memory is still 154.1 MB. Free memory was 119.0 MB in the beginning and 117.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 555.22 ms. Allocated memory is still 154.1 MB. Free memory was 117.5 MB in the beginning and 105.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1322.97 ms. Allocated memory is still 154.1 MB. Free memory was 104.9 MB in the beginning and 62.5 MB in the end (delta: 42.5 MB). Peak memory consumption was 43.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 17]: Loop Invariant Derived loop invariant: x <= 2 * (x / 2) && 0 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 12 SDslu, 23 SDs, 0 SdLazy, 24 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 12 NumberOfFragments, 62 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 128 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 715 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...