/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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 [2020-10-29 04:14:51,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 04:14:51,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 04:14:51,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 04:14:51,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 04:14:51,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 04:14:51,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 04:14:51,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 04:14:51,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 04:14:51,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 04:14:51,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 04:14:51,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 04:14:51,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 04:14:51,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 04:14:51,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 04:14:51,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 04:14:51,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 04:14:51,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 04:14:51,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 04:14:51,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 04:14:51,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 04:14:51,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 04:14:51,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 04:14:51,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 04:14:51,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 04:14:51,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 04:14:51,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 04:14:51,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 04:14:51,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 04:14:51,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 04:14:51,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 04:14:51,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 04:14:51,529 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 04:14:51,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 04:14:51,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 04:14:51,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 04:14:51,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 04:14:51,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 04:14:51,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 04:14:51,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 04:14:51,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 04:14:51,543 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 [2020-10-29 04:14:51,596 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 04:14:51,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 04:14:51,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 04:14:51,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 04:14:51,603 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 04:14:51,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 04:14:51,604 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 04:14:51,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 04:14:51,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 04:14:51,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 04:14:51,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 04:14:51,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 04:14:51,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 04:14:51,606 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 04:14:51,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 04:14:51,607 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 04:14:51,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 04:14:51,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 04:14:51,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 04:14:51,608 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 04:14:51,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 04:14:51,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 04:14:51,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 04:14:51,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 04:14:51,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 04:14:51,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 04:14:51,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 04:14:51,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 04:14:51,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 04:14:51,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 04:14:52,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 04:14:52,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 04:14:52,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 04:14:52,102 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 04:14:52,103 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 04:14:52,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-10-29 04:14:52,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c44a9d2e/53bce2b92e544aa38ddc30c831ff8488/FLAGa3bd2eba8 [2020-10-29 04:14:52,812 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 04:14:52,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-10-29 04:14:52,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c44a9d2e/53bce2b92e544aa38ddc30c831ff8488/FLAGa3bd2eba8 [2020-10-29 04:14:53,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9c44a9d2e/53bce2b92e544aa38ddc30c831ff8488 [2020-10-29 04:14:53,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 04:14:53,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 04:14:53,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 04:14:53,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 04:14:53,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 04:14:53,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:14:53" (1/1) ... [2020-10-29 04:14:53,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@292dc09c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:53, skipping insertion in model container [2020-10-29 04:14:53,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:14:53" (1/1) ... [2020-10-29 04:14:53,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 04:14:53,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 04:14:53,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 04:14:53,429 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 04:14:53,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 04:14:53,472 INFO L208 MainTranslator]: Completed translation [2020-10-29 04:14:53,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:53 WrapperNode [2020-10-29 04:14:53,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 04:14:53,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 04:14:53,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 04:14:53,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 04:14:53,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:53" (1/1) ... [2020-10-29 04:14:53,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:53" (1/1) ... [2020-10-29 04:14:53,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:53" (1/1) ... [2020-10-29 04:14:53,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:53" (1/1) ... [2020-10-29 04:14:53,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:53" (1/1) ... [2020-10-29 04:14:53,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:53" (1/1) ... [2020-10-29 04:14:53,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:53" (1/1) ... [2020-10-29 04:14:53,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 04:14:53,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 04:14:53,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 04:14:53,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 04:14:53,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:53" (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 [2020-10-29 04:14:53,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 04:14:53,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 04:14:53,603 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 04:14:53,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 04:14:53,603 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 04:14:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 04:14:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 04:14:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 04:14:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 04:14:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-29 04:14:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 04:14:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 04:14:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 04:14:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 04:14:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 04:14:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 04:14:53,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 04:14:53,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 04:14:54,143 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 04:14:54,143 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 04:14:54,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:14:54 BoogieIcfgContainer [2020-10-29 04:14:54,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 04:14:54,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 04:14:54,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 04:14:54,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 04:14:54,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:14:53" (1/3) ... [2020-10-29 04:14:54,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b065ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:14:54, skipping insertion in model container [2020-10-29 04:14:54,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:14:53" (2/3) ... [2020-10-29 04:14:54,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b065ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:14:54, skipping insertion in model container [2020-10-29 04:14:54,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:14:54" (3/3) ... [2020-10-29 04:14:54,155 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-10-29 04:14:54,168 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 04:14:54,173 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 04:14:54,187 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 04:14:54,217 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 04:14:54,217 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 04:14:54,217 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 04:14:54,217 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 04:14:54,218 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 04:14:54,218 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 04:14:54,218 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 04:14:54,218 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 04:14:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-29 04:14:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 04:14:54,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:14:54,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:14:54,244 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:14:54,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:14:54,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1511546603, now seen corresponding path program 1 times [2020-10-29 04:14:54,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:14:54,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770544454] [2020-10-29 04:14:54,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:14:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:14:54,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:54,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:14:54,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 04:14:54,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:14:54,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-29 04:14:54,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:14:54,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:14:54,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:14:54,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 04:14:54,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:14:54,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 04:14:54,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:14:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:14:54,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:54,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:14:54,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:14:54,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:14:54,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 04:14:54,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:14:54,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:14:54,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:14:54,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:14:54,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:14:54,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 04:14:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:14:54,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770544454] [2020-10-29 04:14:54,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 04:14:54,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 04:14:54,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291473609] [2020-10-29 04:14:54,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 04:14:54,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:14:54,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 04:14:54,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 04:14:54,830 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-29 04:14:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:14:54,940 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-10-29 04:14:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 04:14:54,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-29 04:14:54,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:14:54,953 INFO L225 Difference]: With dead ends: 44 [2020-10-29 04:14:54,953 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 04:14:54,959 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 [2020-10-29 04:14:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 04:14:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-29 04:14:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 04:14:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2020-10-29 04:14:55,026 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 12 [2020-10-29 04:14:55,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:14:55,028 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2020-10-29 04:14:55,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 04:14:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2020-10-29 04:14:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 04:14:55,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:14:55,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 04:14:55,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 04:14:55,032 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:14:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:14:55,034 INFO L82 PathProgramCache]: Analyzing trace with hash 951155029, now seen corresponding path program 1 times [2020-10-29 04:14:55,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:14:55,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724419382] [2020-10-29 04:14:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:14:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:14:55,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:14:55,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 04:14:55,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:14:55,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-29 04:14:55,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:14:55,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:14:55,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:14:55,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 04:14:55,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 04:14:55,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:14:55,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:14:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:14:55,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:14:55,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:14:55,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:14:55,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 04:14:55,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:14:55,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:14:55,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:14:55,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:14:55,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:14:55,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:14:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:14:55,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724419382] [2020-10-29 04:14:55,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 04:14:55,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 04:14:55,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084695638] [2020-10-29 04:14:55,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 04:14:55,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:14:55,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 04:14:55,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 04:14:55,345 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand 4 states. [2020-10-29 04:14:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:14:55,580 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2020-10-29 04:14:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 04:14:55,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-29 04:14:55,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:14:55,584 INFO L225 Difference]: With dead ends: 31 [2020-10-29 04:14:55,584 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 04:14:55,585 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 [2020-10-29 04:14:55,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 04:14:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-29 04:14:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-29 04:14:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2020-10-29 04:14:55,596 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 12 [2020-10-29 04:14:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:14:55,596 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2020-10-29 04:14:55,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 04:14:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2020-10-29 04:14:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 04:14:55,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:14:55,598 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] [2020-10-29 04:14:55,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 04:14:55,598 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:14:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:14:55,599 INFO L82 PathProgramCache]: Analyzing trace with hash -310557545, now seen corresponding path program 1 times [2020-10-29 04:14:55,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:14:55,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383500583] [2020-10-29 04:14:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:14:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:14:55,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:55,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:56,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:56,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:56,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:14:56,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 04:14:56,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 04:14:56,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-10-29 04:14:56,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:14:56,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:14:56,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 04:14:56,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 04:14:56,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 04:14:56,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:14:56,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 04:14:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 04:14:56,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 04:14:56,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 04:14:56,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 04:14:56,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 04:14:56,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 04:14:56,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 04:14:56,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 04:14:56,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 04:14:56,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 04:14:56,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 04:14:56,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 04:14:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 04:14:56,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383500583] [2020-10-29 04:14:56,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 04:14:56,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 04:14:56,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752604038] [2020-10-29 04:14:56,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 04:14:56,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 04:14:56,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 04:14:56,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 04:14:56,534 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 4 states. [2020-10-29 04:14:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 04:14:56,751 INFO L93 Difference]: Finished difference Result 53 states and 84 transitions. [2020-10-29 04:14:56,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 04:14:56,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-29 04:14:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 04:14:56,754 INFO L225 Difference]: With dead ends: 53 [2020-10-29 04:14:56,754 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 04:14:56,755 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 [2020-10-29 04:14:56,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 04:14:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-29 04:14:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 04:14:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2020-10-29 04:14:56,765 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 23 [2020-10-29 04:14:56,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 04:14:56,766 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2020-10-29 04:14:56,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 04:14:56,766 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2020-10-29 04:14:56,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 04:14:56,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 04:14:56,767 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] [2020-10-29 04:14:56,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 04:14:56,768 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 04:14:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 04:14:56,768 INFO L82 PathProgramCache]: Analyzing trace with hash -167075749, now seen corresponding path program 1 times [2020-10-29 04:14:56,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 04:14:56,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407863814] [2020-10-29 04:14:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 04:14:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 04:14:56,796 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 04:14:56,797 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 04:14:56,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 04:14:56,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 04:14:56 BoogieIcfgContainer [2020-10-29 04:14:56,817 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 04:14:56,820 INFO L168 Benchmark]: Toolchain (without parser) took 3664.17 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 134.1 MB in the beginning and 160.2 MB in the end (delta: -26.1 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. [2020-10-29 04:14:56,820 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory is still 131.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 04:14:56,821 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.68 ms. Allocated memory is still 158.3 MB. Free memory was 133.5 MB in the beginning and 123.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-29 04:14:56,822 INFO L168 Benchmark]: Boogie Preprocessor took 42.81 ms. Allocated memory is still 158.3 MB. Free memory was 123.7 MB in the beginning and 122.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 04:14:56,823 INFO L168 Benchmark]: RCFGBuilder took 627.61 ms. Allocated memory is still 158.3 MB. Free memory was 122.0 MB in the beginning and 139.2 MB in the end (delta: -17.2 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-10-29 04:14:56,824 INFO L168 Benchmark]: TraceAbstraction took 2669.55 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 139.2 MB in the beginning and 160.2 MB in the end (delta: -21.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2020-10-29 04:14:56,828 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 158.3 MB. Free memory is still 131.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 312.68 ms. Allocated memory is still 158.3 MB. Free memory was 133.5 MB in the beginning and 123.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.81 ms. Allocated memory is still 158.3 MB. Free memory was 123.7 MB in the beginning and 122.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 627.61 ms. Allocated memory is still 158.3 MB. Free memory was 122.0 MB in the beginning and 139.2 MB in the end (delta: -17.2 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2669.55 ms. Allocated memory was 158.3 MB in the beginning and 190.8 MB in the end (delta: 32.5 MB). Free memory was 139.2 MB in the beginning and 160.2 MB in the end (delta: -21.0 MB). Peak memory consumption was 12.0 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: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 90 SDtfs, 104 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, 0.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 3190 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...