/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:35:41,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:35:41,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:35:41,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:35:41,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:35:41,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:35:41,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:35:41,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:35:41,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:35:41,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:35:41,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:35:41,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:35:41,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:35:41,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:35:41,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:35:41,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:35:41,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:35:41,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:35:41,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:35:41,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:35:41,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:35:41,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:35:41,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:35:41,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:35:41,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:35:41,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:35:41,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:35:41,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:35:41,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:35:41,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:35:41,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:35:41,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:35:41,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:35:41,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:35:41,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:35:41,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:35:41,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:35:41,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:35:41,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:35:41,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:35:41,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:35:41,454 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 [2020-10-28 09:35:41,503 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:35:41,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:35:41,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:35:41,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:35:41,509 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:35:41,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:35:41,510 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:35:41,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:35:41,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:35:41,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:35:41,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:35:41,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:35:41,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:35:41,512 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:35:41,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:35:41,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:35:41,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:35:41,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:35:41,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:35:41,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:35:41,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:35:41,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:35:41,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:35:41,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:35:41,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:35:41,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:35:41,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:35:41,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:35:41,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:35:41,515 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:35:41,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:35:41,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:35:41,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:35:41,983 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:35:41,983 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:35:41,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-10-28 09:35:42,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a02c9f65a/721d3627e2a44464a945fd301fbf0c63/FLAG8f5e7dbcf [2020-10-28 09:35:42,827 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:35:42,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-10-28 09:35:42,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a02c9f65a/721d3627e2a44464a945fd301fbf0c63/FLAG8f5e7dbcf [2020-10-28 09:35:43,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a02c9f65a/721d3627e2a44464a945fd301fbf0c63 [2020-10-28 09:35:43,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:35:43,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:35:43,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:35:43,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:35:43,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:35:43,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:35:43" (1/1) ... [2020-10-28 09:35:43,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d83927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:43, skipping insertion in model container [2020-10-28 09:35:43,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:35:43" (1/1) ... [2020-10-28 09:35:43,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:35:43,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:35:43,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:35:43,390 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:35:43,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:35:43,431 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:35:43,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:43 WrapperNode [2020-10-28 09:35:43,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:35:43,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:35:43,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:35:43,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:35:43,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:43" (1/1) ... [2020-10-28 09:35:43,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:43" (1/1) ... [2020-10-28 09:35:43,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:43" (1/1) ... [2020-10-28 09:35:43,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:43" (1/1) ... [2020-10-28 09:35:43,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:43" (1/1) ... [2020-10-28 09:35:43,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:43" (1/1) ... [2020-10-28 09:35:43,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:43" (1/1) ... [2020-10-28 09:35:43,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:35:43,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:35:43,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:35:43,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:35:43,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:43" (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 [2020-10-28 09:35:43,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:35:43,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:35:43,558 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:35:43,558 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:35:43,559 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:35:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:35:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:35:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:35:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:35:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-28 09:35:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:35:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:35:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:35:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:35:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:35:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:35:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:35:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:35:43,918 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:35:43,918 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 09:35:43,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:35:43 BoogieIcfgContainer [2020-10-28 09:35:43,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:35:43,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:35:43,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:35:43,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:35:43,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:35:43" (1/3) ... [2020-10-28 09:35:43,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17be890c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:35:43, skipping insertion in model container [2020-10-28 09:35:43,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:35:43" (2/3) ... [2020-10-28 09:35:43,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17be890c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:35:43, skipping insertion in model container [2020-10-28 09:35:43,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:35:43" (3/3) ... [2020-10-28 09:35:43,930 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-10-28 09:35:43,960 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:35:43,972 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:35:43,989 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:35:44,019 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:35:44,019 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:35:44,019 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:35:44,019 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:35:44,019 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:35:44,020 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:35:44,020 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:35:44,020 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:35:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-28 09:35:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 09:35:44,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:44,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:44,055 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:44,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:44,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1511546603, now seen corresponding path program 1 times [2020-10-28 09:35:44,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:44,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287620044] [2020-10-28 09:35:44,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:44,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:44,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:44,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 09:35:44,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:44,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-28 09:35:44,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:44,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:35:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:35:44,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:44,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:44,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:44,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:44,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:44,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 09:35:44,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:44,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:44,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:44,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:44,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:44,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:35:44,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287620044] [2020-10-28 09:35:44,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:35:44,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:35:44,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359951753] [2020-10-28 09:35:44,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:35:44,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:44,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:35:44,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:35:44,693 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-28 09:35:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:44,802 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-10-28 09:35:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:35:44,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 09:35:44,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:44,815 INFO L225 Difference]: With dead ends: 44 [2020-10-28 09:35:44,815 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 09:35:44,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:35:44,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 09:35:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 09:35:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 09:35:44,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2020-10-28 09:35:44,888 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 12 [2020-10-28 09:35:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:44,889 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2020-10-28 09:35:44,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:35:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2020-10-28 09:35:44,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 09:35:44,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:44,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:44,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:35:44,893 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:44,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:44,896 INFO L82 PathProgramCache]: Analyzing trace with hash 951155029, now seen corresponding path program 1 times [2020-10-28 09:35:44,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:44,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001736549] [2020-10-28 09:35:44,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:44,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:45,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 09:35:45,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:45,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-28 09:35:45,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:45,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:45,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:35:45,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:35:45,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:35:45,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:35:45,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:45,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:45,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:45,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:45,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 09:35:45,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:45,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:45,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:45,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:45,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:45,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:35:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:35:45,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001736549] [2020-10-28 09:35:45,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:35:45,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:35:45,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783198765] [2020-10-28 09:35:45,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:35:45,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:45,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:35:45,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:35:45,290 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand 4 states. [2020-10-28 09:35:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:45,509 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2020-10-28 09:35:45,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:35:45,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 09:35:45,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:45,514 INFO L225 Difference]: With dead ends: 31 [2020-10-28 09:35:45,514 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 09:35:45,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:35:45,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 09:35:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-28 09:35:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 09:35:45,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2020-10-28 09:35:45,537 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 12 [2020-10-28 09:35:45,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:45,538 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2020-10-28 09:35:45,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:35:45,538 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2020-10-28 09:35:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:35:45,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:45,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:45,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:35:45,542 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:45,543 INFO L82 PathProgramCache]: Analyzing trace with hash -310557545, now seen corresponding path program 1 times [2020-10-28 09:35:45,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:45,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736766408] [2020-10-28 09:35:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:45,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:45,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:46,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:46,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:46,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:46,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 09:35:46,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 09:35:46,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 708 [2020-10-28 09:35:46,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:46,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:46,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:35:46,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 09:35:46,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:35:46,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:35:46,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:35:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:35:46,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:35:46,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:35:46,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:35:46,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:35:46,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:35:46,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:35:46,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:35:46,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:35:46,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:35:46,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:35:46,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:35:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:35:46,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736766408] [2020-10-28 09:35:46,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:35:46,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:35:46,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608754521] [2020-10-28 09:35:46,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:35:46,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:35:46,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:35:46,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:35:46,348 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 4 states. [2020-10-28 09:35:46,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:35:46,536 INFO L93 Difference]: Finished difference Result 53 states and 84 transitions. [2020-10-28 09:35:46,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:35:46,537 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-28 09:35:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:35:46,539 INFO L225 Difference]: With dead ends: 53 [2020-10-28 09:35:46,540 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 09:35:46,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:35:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 09:35:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-28 09:35:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 09:35:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2020-10-28 09:35:46,561 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 23 [2020-10-28 09:35:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:35:46,561 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2020-10-28 09:35:46,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:35:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2020-10-28 09:35:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:35:46,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:35:46,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:35:46,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:35:46,565 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:35:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:35:46,566 INFO L82 PathProgramCache]: Analyzing trace with hash -167075749, now seen corresponding path program 1 times [2020-10-28 09:35:46,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:35:46,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863204381] [2020-10-28 09:35:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:35:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 09:35:46,589 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 09:35:46,590 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 09:35:46,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:35:46,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:35:46 BoogieIcfgContainer [2020-10-28 09:35:46,619 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 09:35:46,623 INFO L168 Benchmark]: Toolchain (without parser) took 3466.42 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 133.1 MB in the beginning and 87.7 MB in the end (delta: 45.4 MB). Peak memory consumption was 78.9 MB. Max. memory is 8.0 GB. [2020-10-28 09:35:46,624 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 158.3 MB. Free memory is still 130.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 09:35:46,625 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.63 ms. Allocated memory is still 158.3 MB. Free memory was 132.4 MB in the beginning and 122.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 09:35:46,626 INFO L168 Benchmark]: Boogie Preprocessor took 41.52 ms. Allocated memory is still 158.3 MB. Free memory was 122.6 MB in the beginning and 121.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 09:35:46,630 INFO L168 Benchmark]: RCFGBuilder took 444.90 ms. Allocated memory is still 158.3 MB. Free memory was 121.1 MB in the beginning and 105.0 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-28 09:35:46,633 INFO L168 Benchmark]: TraceAbstraction took 2696.71 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 104.5 MB in the beginning and 87.7 MB in the end (delta: 16.9 MB). Peak memory consumption was 49.6 MB. Max. memory is 8.0 GB. [2020-10-28 09:35:46,644 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 158.3 MB. Free memory is still 130.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.63 ms. Allocated memory is still 158.3 MB. Free memory was 132.4 MB in the beginning and 122.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.52 ms. Allocated memory is still 158.3 MB. Free memory was 122.6 MB in the beginning and 121.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 444.90 ms. Allocated memory is still 158.3 MB. Free memory was 121.1 MB in the beginning and 105.0 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2696.71 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 104.5 MB in the beginning and 87.7 MB in the end (delta: 16.9 MB). Peak memory consumption was 49.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L19] x += 2 [L21] COND FALSE !(y % 2 == 0) [L22] x -= 2 [L24] COND FALSE !(y % 2 == 0) [L25] x += 2 [L27] COND FALSE !(y % 2 == 0) [L28] x -= 2 [L30] COND FALSE !(y % 2 == 0) [L31] x += 2 [L33] COND FALSE !(y % 2 == 0) [L34] x -= 4 [L36] COND FALSE !(y % 2 == 0) [L37] x += 4 [L39] COND FALSE !(y % 2 == 0) [L40] x += 2 [L42] COND FALSE !(y % 2 == 0) [L43] x -= 4 [L45] COND FALSE !(y % 2 == 0) [L46] x -= 4 [L17] COND FALSE !(x < 99) [L49] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L7] COND TRUE !(cond) [L8] CALL reach_error() [L3] __assert_fail("0", "diamond_2-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 90 SDtfs, 103 SDslu, 19 SDs, 0 SdLazy, 64 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 3498 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...