/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/ldv-regression/test23-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:14:22,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:14:22,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:14:22,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:14:22,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:14:22,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:14:22,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:14:22,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:14:22,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:14:22,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:14:22,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:14:22,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:14:22,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:14:22,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:14:22,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:14:22,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:14:22,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:14:22,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:14:22,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:14:22,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:14:22,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:14:22,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:14:22,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:14:22,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:14:22,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:14:22,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:14:22,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:14:22,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:14:22,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:14:22,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:14:22,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:14:22,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:14:22,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:14:22,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:14:22,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:14:22,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:14:22,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:14:22,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:14:22,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:14:22,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:14:22,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:14:22,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:14:22,290 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:14:22,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:14:22,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:14:22,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:14:22,292 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:14:22,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:14:22,293 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:14:22,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:14:22,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:14:22,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:14:22,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:14:22,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:14:22,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:14:22,296 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:14:22,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:14:22,297 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:14:22,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:14:22,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:14:22,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:14:22,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:14:22,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:14:22,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:14:22,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:14:22,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:14:22,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:14:22,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:14:22,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:14:22,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:14:22,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:14:22,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:14:22,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:14:22,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:14:22,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:14:22,742 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:14:22,743 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:14:22,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test23-2.c [2020-10-27 01:14:22,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b3f40544/99188483a12c406e8761f0fd3286e810/FLAG3ebe1c1e3 [2020-10-27 01:14:23,502 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:14:23,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test23-2.c [2020-10-27 01:14:23,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b3f40544/99188483a12c406e8761f0fd3286e810/FLAG3ebe1c1e3 [2020-10-27 01:14:23,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4b3f40544/99188483a12c406e8761f0fd3286e810 [2020-10-27 01:14:23,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:14:23,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:14:23,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:14:23,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:14:23,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:14:23,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:14:23" (1/1) ... [2020-10-27 01:14:23,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ca3a388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:23, skipping insertion in model container [2020-10-27 01:14:23,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:14:23" (1/1) ... [2020-10-27 01:14:23,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:14:23,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:14:24,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:14:24,109 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:14:24,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:14:24,150 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:14:24,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:24 WrapperNode [2020-10-27 01:14:24,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:14:24,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:14:24,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:14:24,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:14:24,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:24" (1/1) ... [2020-10-27 01:14:24,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:24" (1/1) ... [2020-10-27 01:14:24,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:24" (1/1) ... [2020-10-27 01:14:24,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:24" (1/1) ... [2020-10-27 01:14:24,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:24" (1/1) ... [2020-10-27 01:14:24,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:24" (1/1) ... [2020-10-27 01:14:24,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:24" (1/1) ... [2020-10-27 01:14:24,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:14:24,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:14:24,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:14:24,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:14:24,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:14:24,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:14:24,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:14:24,283 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:14:24,283 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-27 01:14:24,283 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-10-27 01:14:24,283 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-27 01:14:24,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:14:24,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:14:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:14:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:14:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:14:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:14:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 01:14:24,285 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 01:14:24,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:14:24,285 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-10-27 01:14:24,285 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 01:14:24,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:14:24,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:14:24,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:14:24,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:14:24,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:14:24,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:14:24,828 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:14:24,828 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:14:24,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:14:24 BoogieIcfgContainer [2020-10-27 01:14:24,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:14:24,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:14:24,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:14:24,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:14:24,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:14:23" (1/3) ... [2020-10-27 01:14:24,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee45cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:14:24, skipping insertion in model container [2020-10-27 01:14:24,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:14:24" (2/3) ... [2020-10-27 01:14:24,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee45cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:14:24, skipping insertion in model container [2020-10-27 01:14:24,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:14:24" (3/3) ... [2020-10-27 01:14:24,846 INFO L111 eAbstractionObserver]: Analyzing ICFG test23-2.c [2020-10-27 01:14:24,859 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:14:24,867 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:14:24,884 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:14:24,935 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:14:24,936 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:14:24,937 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:14:24,937 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:14:24,937 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:14:24,937 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:14:24,937 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:14:24,938 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:14:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-27 01:14:24,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 01:14:24,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:24,974 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:14:24,975 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:24,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:24,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2067776934, now seen corresponding path program 1 times [2020-10-27 01:14:24,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:24,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347661882] [2020-10-27 01:14:24,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:25,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:25,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:25,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:14:25,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:25,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-27 01:14:25,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 01:14:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:25,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:14:25,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:25,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:25,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:25,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:25,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:25,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 01:14:25,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:25,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:25,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:25,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:25,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:25,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:25,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:25,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:25,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:25,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:25,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:14:25,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:25,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:25,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:25,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:25,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:25,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:25,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:25,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:14:25,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:25,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:25,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:25,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:25,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:25,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:25,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:25,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:25,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:25,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:25,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:14:25,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:25,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:25,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:25,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:25,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:25,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-27 01:14:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:25,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:25,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:25,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:25,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:25,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:14:25,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:25,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:25,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:25,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:25,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:25,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347661882] [2020-10-27 01:14:25,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:14:25,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:14:25,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140138270] [2020-10-27 01:14:25,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:14:25,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:25,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:14:25,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:14:25,742 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-10-27 01:14:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:25,893 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-10-27 01:14:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:14:25,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 01:14:25,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:25,904 INFO L225 Difference]: With dead ends: 51 [2020-10-27 01:14:25,905 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:14:25,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:14:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:14:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 01:14:25,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:14:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 01:14:25,958 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 31 [2020-10-27 01:14:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:25,960 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 01:14:25,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:14:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 01:14:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:14:25,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:25,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:14:25,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:14:25,963 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:25,964 INFO L82 PathProgramCache]: Analyzing trace with hash -721992407, now seen corresponding path program 1 times [2020-10-27 01:14:25,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:25,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009284963] [2020-10-27 01:14:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:14:26,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-27 01:14:26,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:14:26,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:26,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:14:26,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:26,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:26,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:14:26,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:26,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:26,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:26,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:26,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:14:26,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:26,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:26,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:26,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:26,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:26,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:14:26,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:26,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:26,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:26,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:26,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:26,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:14:26,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:26,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:26,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:26,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:26,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-27 01:14:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:26,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:14:26,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:26,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:26,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:26,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:26,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009284963] [2020-10-27 01:14:26,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:14:26,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:14:26,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252329163] [2020-10-27 01:14:26,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:14:26,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:26,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:14:26,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:14:26,507 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 6 states. [2020-10-27 01:14:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:26,726 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-27 01:14:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:14:26,726 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-27 01:14:26,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:26,728 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:14:26,728 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:14:26,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:14:26,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:14:26,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:14:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:14:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 01:14:26,740 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 32 [2020-10-27 01:14:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:26,741 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 01:14:26,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:14:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 01:14:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:14:26,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:26,743 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:14:26,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:14:26,743 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:26,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1217317746, now seen corresponding path program 1 times [2020-10-27 01:14:26,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:26,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598878869] [2020-10-27 01:14:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:26,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:26,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:26,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:14:26,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:26,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-27 01:14:26,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:26,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:14:26,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:26,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:14:26,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:27,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:14:27,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:27,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:27,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:14:27,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:27,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:27,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:27,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:27,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:14:27,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:27,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 01:14:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:27,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:27,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:27,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:27,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 01:14:27,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:27,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:14:27,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598878869] [2020-10-27 01:14:27,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:14:27,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:14:27,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300790614] [2020-10-27 01:14:27,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:14:27,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:27,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:14:27,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:14:27,135 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 7 states. [2020-10-27 01:14:27,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:27,315 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-27 01:14:27,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:14:27,316 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-27 01:14:27,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:27,318 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:14:27,318 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:14:27,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:14:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:14:27,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 01:14:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:14:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 01:14:27,327 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 34 [2020-10-27 01:14:27,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:27,328 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 01:14:27,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:14:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 01:14:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:14:27,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:14:27,329 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:14:27,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:14:27,330 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:14:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:14:27,331 INFO L82 PathProgramCache]: Analyzing trace with hash -483598669, now seen corresponding path program 2 times [2020-10-27 01:14:27,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:14:27,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634043111] [2020-10-27 01:14:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:14:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:27,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:27,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:27,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:14:27,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:14:27,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-27 01:14:27,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:27,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:14:27,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 01:14:27,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:14:27,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:14:28,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:14:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:28,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:28,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:28,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:28,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:28,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 01:14:28,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:28,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:28,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:28,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:28,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:28,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 01:14:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:28,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:28,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:28,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:28,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:28,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:14:28,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:28,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:28,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:28,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:28,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:28,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-27 01:14:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:28,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:28,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:28,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:28,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:28,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:14:28,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:28,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:28,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:28,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:28,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:28,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-27 01:14:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:28,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:28,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:28,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 01:14:28,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:28,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:14:28,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:28,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:14:28,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:28,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:14:28,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:28,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-27 01:14:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:14:28,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:14:28,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:14:28,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:14:28,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:14:28,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 01:14:28,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:14:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:14:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:14:28,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:14:28,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:14:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 01:14:28,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634043111] [2020-10-27 01:14:28,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:14:28,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:14:28,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281494453] [2020-10-27 01:14:28,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:14:28,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:14:28,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:14:28,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:14:28,369 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2020-10-27 01:14:28,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:14:28,758 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-27 01:14:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:14:28,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-27 01:14:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:14:28,759 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:14:28,760 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 01:14:28,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:14:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 01:14:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 01:14:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 01:14:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 01:14:28,761 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-10-27 01:14:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:14:28,762 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 01:14:28,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:14:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 01:14:28,762 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 01:14:28,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:14:28,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 01:14:28,978 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 01:14:28,979 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 01:14:28,979 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 01:14:28,979 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 01:14:28,979 INFO L274 CegarLoopResult]: For program point initEXIT(lines 14 21) no Hoare annotation was computed. [2020-10-27 01:14:28,979 INFO L270 CegarLoopResult]: At program point initENTRY(lines 14 21) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-10-27 01:14:28,980 INFO L274 CegarLoopResult]: For program point initFINAL(lines 14 21) no Hoare annotation was computed. [2020-10-27 01:14:28,980 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:14:28,980 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#memory_int| |old(#memory_int)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |~#d2~0.base| |old(~#d2~0.base)|) (= |~#d1~0.base| |old(~#d1~0.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |~#d2~0.offset| |old(~#d2~0.offset)|) (= |old(#valid)| |#valid|) (= |#t~string5.base| |old(#t~string5.base)|) (= |~#d1~0.offset| |old(~#d1~0.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-10-27 01:14:28,980 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:14:28,980 INFO L274 CegarLoopResult]: For program point get_dummyFINAL(lines 23 26) no Hoare annotation was computed. [2020-10-27 01:14:28,980 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-27 01:14:28,980 INFO L277 CegarLoopResult]: At program point get_dummyENTRY(lines 23 26) the Hoare annotation is: true [2020-10-27 01:14:28,981 INFO L274 CegarLoopResult]: For program point get_dummyEXIT(lines 23 26) no Hoare annotation was computed. [2020-10-27 01:14:28,981 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:14:28,981 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 01:14:28,981 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 01:14:28,981 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:14:28,981 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 33 54) no Hoare annotation was computed. [2020-10-27 01:14:28,981 INFO L274 CegarLoopResult]: For program point L52(line 52) no Hoare annotation was computed. [2020-10-27 01:14:28,981 INFO L270 CegarLoopResult]: At program point L46(lines 34 54) the Hoare annotation is: false [2020-10-27 01:14:28,982 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 33 54) no Hoare annotation was computed. [2020-10-27 01:14:28,982 INFO L274 CegarLoopResult]: For program point L42-1(lines 42 44) no Hoare annotation was computed. [2020-10-27 01:14:28,982 INFO L270 CegarLoopResult]: At program point L42-3(lines 42 44) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset))) (and (<= main_~i~0 .cse0) (= (+ main_~pd2~0.offset (* .cse0 4) 8) main_~pa~0.offset) (= main_~pd2~0.base main_~pa~0.base))) [2020-10-27 01:14:28,982 INFO L274 CegarLoopResult]: For program point L38(lines 38 48) no Hoare annotation was computed. [2020-10-27 01:14:28,982 INFO L270 CegarLoopResult]: At program point L42-4(lines 42 44) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset))) (and (= main_~i~0 (select (select |#memory_int| main_~pd2~0.base) (+ main_~pd2~0.offset (* main_~i~0 4) 8))) (= (+ main_~pd2~0.offset (* 4 .cse0) 8) main_~pa~0.offset) (<= main_~i~0 .cse0) (= main_~pd2~0.base main_~pa~0.base))) [2020-10-27 01:14:28,983 INFO L274 CegarLoopResult]: For program point L36(line 36) no Hoare annotation was computed. [2020-10-27 01:14:28,983 INFO L274 CegarLoopResult]: For program point L38-2(lines 38 48) no Hoare annotation was computed. [2020-10-27 01:14:28,983 INFO L277 CegarLoopResult]: At program point L36-1(line 36) the Hoare annotation is: true [2020-10-27 01:14:28,983 INFO L274 CegarLoopResult]: For program point L36-2(line 36) no Hoare annotation was computed. [2020-10-27 01:14:28,983 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 33 54) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-10-27 01:14:28,983 INFO L274 CegarLoopResult]: For program point L45(line 45) no Hoare annotation was computed. [2020-10-27 01:14:28,983 INFO L274 CegarLoopResult]: For program point L45-1(lines 45 47) no Hoare annotation was computed. [2020-10-27 01:14:28,984 INFO L277 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: true [2020-10-27 01:14:28,984 INFO L277 CegarLoopResult]: At program point checkENTRY(lines 28 31) the Hoare annotation is: true [2020-10-27 01:14:28,984 INFO L274 CegarLoopResult]: For program point checkFINAL(lines 28 31) no Hoare annotation was computed. [2020-10-27 01:14:28,984 INFO L274 CegarLoopResult]: For program point checkEXIT(lines 28 31) no Hoare annotation was computed. [2020-10-27 01:14:28,995 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-27 01:14:28,996 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-27 01:14:29,002 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-27 01:14:29,002 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-27 01:14:29,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:14:29 BoogieIcfgContainer [2020-10-27 01:14:29,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:14:29,008 INFO L168 Benchmark]: Toolchain (without parser) took 5133.08 ms. Allocated memory was 162.5 MB in the beginning and 218.1 MB in the end (delta: 55.6 MB). Free memory was 138.4 MB in the beginning and 105.8 MB in the end (delta: 32.6 MB). Peak memory consumption was 89.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:29,009 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 162.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:14:29,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.41 ms. Allocated memory is still 162.5 MB. Free memory was 137.8 MB in the beginning and 127.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:29,010 INFO L168 Benchmark]: Boogie Preprocessor took 52.09 ms. Allocated memory is still 162.5 MB. Free memory was 127.9 MB in the beginning and 126.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:29,011 INFO L168 Benchmark]: RCFGBuilder took 627.32 ms. Allocated memory is still 162.5 MB. Free memory was 126.1 MB in the beginning and 145.7 MB in the end (delta: -19.5 MB). Peak memory consumption was 21.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:29,012 INFO L168 Benchmark]: TraceAbstraction took 4168.06 ms. Allocated memory was 162.5 MB in the beginning and 218.1 MB in the end (delta: 55.6 MB). Free memory was 145.1 MB in the beginning and 105.8 MB in the end (delta: 39.3 MB). Peak memory consumption was 94.9 MB. Max. memory is 8.0 GB. [2020-10-27 01:14:29,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 162.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 270.41 ms. Allocated memory is still 162.5 MB. Free memory was 137.8 MB in the beginning and 127.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.09 ms. Allocated memory is still 162.5 MB. Free memory was 127.9 MB in the beginning and 126.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 627.32 ms. Allocated memory is still 162.5 MB. Free memory was 126.1 MB in the beginning and 145.7 MB in the end (delta: -19.5 MB). Peak memory consumption was 21.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4168.06 ms. Allocated memory was 162.5 MB in the beginning and 218.1 MB in the end (delta: 55.6 MB). Free memory was 145.1 MB in the beginning and 105.8 MB in the end (delta: 39.3 MB). Peak memory consumption was 94.9 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 - 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: 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: 42]: Loop Invariant [2020-10-27 01:14:29,025 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-27 01:14:29,025 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-27 01:14:29,026 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-27 01:14:29,026 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (i <= unknown-#memory_int-unknown[pa][pa] && pd2 + unknown-#memory_int-unknown[pa][pa] * 4 + 8 == pa) && pd2 == pa - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 34 SDslu, 180 SDs, 0 SdLazy, 300 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 13 LocationsWithAnnotation, 20 PreInvPairs, 23 NumberOfFragments, 118 HoareAnnotationTreeSize, 20 FomulaSimplifications, 65 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 13 FomulaSimplificationsInter, 176 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 17554 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 18/24 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...