/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:34:38,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:34:38,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:34:38,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:34:38,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:34:38,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:34:38,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:34:38,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:34:38,468 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:34:38,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:34:38,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:34:38,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:34:38,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:34:38,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:34:38,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:34:38,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:34:38,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:34:38,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:34:38,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:34:38,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:34:38,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:34:38,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:34:38,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:34:38,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:34:38,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:34:38,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:34:38,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:34:38,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:34:38,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:34:38,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:34:38,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:34:38,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:34:38,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:34:38,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:34:38,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:34:38,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:34:38,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:34:38,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:34:38,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:34:38,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:34:38,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:34:38,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:34:38,596 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:34:38,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:34:38,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:34:38,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:34:38,601 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:34:38,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:34:38,602 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:34:38,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:34:38,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:34:38,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:34:38,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:34:38,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:34:38,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:34:38,604 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:34:38,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:34:38,604 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:34:38,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:34:38,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:34:38,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:34:38,605 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:34:38,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:34:38,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:34:38,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:34:38,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:34:38,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:34:38,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:34:38,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:34:38,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:34:38,607 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:34:38,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:34:39,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:34:39,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:34:39,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:34:39,074 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:34:39,074 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:34:39,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-10-27 01:34:39,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a2ed6261/f0c864f3a3ac434caf0f4593aab38c59/FLAG698c55ced [2020-10-27 01:34:39,869 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:34:39,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-10-27 01:34:39,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a2ed6261/f0c864f3a3ac434caf0f4593aab38c59/FLAG698c55ced [2020-10-27 01:34:40,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a2ed6261/f0c864f3a3ac434caf0f4593aab38c59 [2020-10-27 01:34:40,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:34:40,253 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:34:40,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:34:40,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:34:40,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:34:40,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:34:40" (1/1) ... [2020-10-27 01:34:40,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d4b374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:40, skipping insertion in model container [2020-10-27 01:34:40,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:34:40" (1/1) ... [2020-10-27 01:34:40,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:34:40,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:34:40,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:34:40,511 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:34:40,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:34:40,544 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:34:40,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:40 WrapperNode [2020-10-27 01:34:40,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:34:40,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:34:40,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:34:40,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:34:40,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:40" (1/1) ... [2020-10-27 01:34:40,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:40" (1/1) ... [2020-10-27 01:34:40,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:40" (1/1) ... [2020-10-27 01:34:40,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:40" (1/1) ... [2020-10-27 01:34:40,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:40" (1/1) ... [2020-10-27 01:34:40,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:40" (1/1) ... [2020-10-27 01:34:40,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:40" (1/1) ... [2020-10-27 01:34:40,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:34:40,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:34:40,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:34:40,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:34:40,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:34:40,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:34:40,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:34:40,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:34:40,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:34:40,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:34:40,660 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:34:40,660 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:34:40,661 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:34:40,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:34:40,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:34:40,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:34:40,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:34:40,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:34:40,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:34:40,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:34:40,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:34:40,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:34:41,091 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:34:41,092 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:34:41,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:34:41 BoogieIcfgContainer [2020-10-27 01:34:41,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:34:41,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:34:41,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:34:41,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:34:41,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:34:40" (1/3) ... [2020-10-27 01:34:41,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3adcb0b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:34:41, skipping insertion in model container [2020-10-27 01:34:41,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:40" (2/3) ... [2020-10-27 01:34:41,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3adcb0b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:34:41, skipping insertion in model container [2020-10-27 01:34:41,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:34:41" (3/3) ... [2020-10-27 01:34:41,109 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-10-27 01:34:41,124 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:34:41,130 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:34:41,147 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:34:41,193 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:34:41,194 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:34:41,194 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:34:41,194 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:34:41,194 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:34:41,194 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:34:41,194 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:34:41,194 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:34:41,217 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 01:34:41,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:34:41,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:41,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:41,225 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:41,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:41,235 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-27 01:34:41,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:41,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119692156] [2020-10-27 01:34:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:41,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:41,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:41,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:34:41,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:41,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-27 01:34:41,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:41,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:41,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:41,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:41,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 01:34:41,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:41,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:41,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:41,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:41,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:41,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 01:34:41,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:41,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:41,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:41,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:41,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:34:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:41,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119692156] [2020-10-27 01:34:41,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:34:41,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:34:41,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086066328] [2020-10-27 01:34:41,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:34:41,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:41,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:34:41,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:34:41,803 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-27 01:34:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:41,865 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-27 01:34:41,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:34:41,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 01:34:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:41,874 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:34:41,875 INFO L226 Difference]: Without dead ends: 13 [2020-10-27 01:34:41,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:34:41,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-27 01:34:41,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-27 01:34:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-27 01:34:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-27 01:34:41,920 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-27 01:34:41,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:41,920 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-27 01:34:41,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:34:41,921 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-27 01:34:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:34:41,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:41,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:41,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:34:41,922 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:41,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:41,923 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-27 01:34:41,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:41,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851693652] [2020-10-27 01:34:41,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:41,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:42,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:42,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:34:42,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:42,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 01:34:42,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:42,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:34:42,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:42,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:34:42,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:42,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:42,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:42,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:42,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:42,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:42,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:34:42,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:42,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:42,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851693652] [2020-10-27 01:34:42,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:34:42,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:34:42,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597295950] [2020-10-27 01:34:42,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:34:42,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:42,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:34:42,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:34:42,176 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-27 01:34:42,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:42,274 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-27 01:34:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:34:42,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 01:34:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:42,276 INFO L225 Difference]: With dead ends: 20 [2020-10-27 01:34:42,276 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 01:34:42,278 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 [2020-10-27 01:34:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 01:34:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 01:34:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 01:34:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 01:34:42,286 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 01:34:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:42,287 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 01:34:42,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:34:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 01:34:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:34:42,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:42,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:42,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:34:42,288 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-27 01:34:42,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:42,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647959216] [2020-10-27 01:34:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:42,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:42,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:42,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:42,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:34:42,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:42,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-27 01:34:42,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:42,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:34:42,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:42,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:34:42,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:34:42,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:42,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:42,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:42,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:42,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:42,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:34:42,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:42,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:42,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:42,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:42,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:42,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647959216] [2020-10-27 01:34:42,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:42,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:34:42,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674433147] [2020-10-27 01:34:42,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:34:42,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:42,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:34:42,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:34:42,720 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-27 01:34:42,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:42,832 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 01:34:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:34:42,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-27 01:34:42,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:42,833 INFO L225 Difference]: With dead ends: 21 [2020-10-27 01:34:42,833 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 01:34:42,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:34:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 01:34:42,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 01:34:42,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:34:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 01:34:42,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 01:34:42,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:42,842 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 01:34:42,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:34:42,842 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 01:34:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:34:42,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:42,843 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:42,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:34:42,843 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-27 01:34:42,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:42,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959384252] [2020-10-27 01:34:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:42,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:42,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:43,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:43,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:34:43,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:43,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-27 01:34:43,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:43,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:34:43,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:43,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:34:43,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:43,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:43,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:43,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:43,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:43,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:34:43,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:43,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:43,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959384252] [2020-10-27 01:34:43,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:43,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:34:43,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559919351] [2020-10-27 01:34:43,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:34:43,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:43,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:34:43,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:34:43,263 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-10-27 01:34:43,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:43,411 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 01:34:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:34:43,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-27 01:34:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:43,413 INFO L225 Difference]: With dead ends: 22 [2020-10-27 01:34:43,413 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 01:34:43,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:34:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 01:34:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 01:34:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:34:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 01:34:43,420 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 01:34:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:43,420 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 01:34:43,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:34:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 01:34:43,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:34:43,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:43,421 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:43,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:34:43,422 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:43,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:43,422 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-27 01:34:43,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:43,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172782786] [2020-10-27 01:34:43,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:43,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:43,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:43,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:43,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:34:43,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:43,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-27 01:34:43,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:34:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:43,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:34:43,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:43,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:43,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:43,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:43,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:43,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:43,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:43,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:43,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:43,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:43,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:43,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:43,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172782786] [2020-10-27 01:34:43,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:43,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:34:43,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128551296] [2020-10-27 01:34:43,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:34:43,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:43,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:34:43,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:34:43,867 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-27 01:34:44,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:44,054 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-27 01:34:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:34:44,054 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-27 01:34:44,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:44,055 INFO L225 Difference]: With dead ends: 23 [2020-10-27 01:34:44,055 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 01:34:44,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:34:44,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 01:34:44,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 01:34:44,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:34:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 01:34:44,062 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 01:34:44,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:44,063 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 01:34:44,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:34:44,063 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 01:34:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:34:44,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:44,064 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:44,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:34:44,064 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:44,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:44,065 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-27 01:34:44,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:44,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967598454] [2020-10-27 01:34:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:44,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:44,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:44,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:44,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:34:44,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:44,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-27 01:34:44,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:44,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:34:44,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:44,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:34:44,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:44,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:44,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:44,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:44,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:44,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:44,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:34:44,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:44,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:44,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:44,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:44,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:44,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967598454] [2020-10-27 01:34:44,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:44,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:34:44,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373418993] [2020-10-27 01:34:44,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:34:44,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:44,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:34:44,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:34:44,565 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-27 01:34:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:44,787 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 01:34:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:34:44,788 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-27 01:34:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:44,789 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:34:44,789 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:34:44,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:34:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:34:44,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 01:34:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:34:44,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 01:34:44,796 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-27 01:34:44,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:44,796 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 01:34:44,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:34:44,797 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 01:34:44,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:34:44,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:44,808 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:44,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:34:44,808 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:44,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-27 01:34:44,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:44,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084396909] [2020-10-27 01:34:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:44,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:44,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:45,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:45,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:34:45,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:45,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-27 01:34:45,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:45,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:34:45,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:45,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:34:45,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:45,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:45,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:45,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:45,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:45,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:45,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:34:45,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:45,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:45,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:45,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:45,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:45,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084396909] [2020-10-27 01:34:45,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:45,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:34:45,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110598512] [2020-10-27 01:34:45,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:34:45,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:45,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:34:45,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:34:45,402 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-27 01:34:45,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:45,661 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-27 01:34:45,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:34:45,661 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 01:34:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:45,662 INFO L225 Difference]: With dead ends: 25 [2020-10-27 01:34:45,662 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:34:45,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:34:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:34:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:34:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:34:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 01:34:45,669 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-27 01:34:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:45,669 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 01:34:45,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:34:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 01:34:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:34:45,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:45,670 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:45,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:34:45,670 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:45,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:45,671 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-27 01:34:45,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:45,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699430381] [2020-10-27 01:34:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:45,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:45,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:45,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:45,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:34:45,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:45,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-27 01:34:45,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:45,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:34:45,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:34:45,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:34:45,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:46,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:46,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:46,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:46,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:46,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:46,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:46,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:46,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:46,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:46,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:46,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:46,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699430381] [2020-10-27 01:34:46,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:46,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:34:46,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051070634] [2020-10-27 01:34:46,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:34:46,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:46,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:34:46,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:34:46,189 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2020-10-27 01:34:46,912 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-27 01:34:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:47,052 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-10-27 01:34:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:34:47,052 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-10-27 01:34:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:47,053 INFO L225 Difference]: With dead ends: 23 [2020-10-27 01:34:47,053 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 01:34:47,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:34:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 01:34:47,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 01:34:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 01:34:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 01:34:47,055 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-10-27 01:34:47,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:47,055 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 01:34:47,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:34:47,055 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 01:34:47,055 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 01:34:47,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:34:47,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 01:34:47,442 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 17 [2020-10-27 01:34:47,445 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 01:34:47,446 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 01:34:47,446 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 01:34:47,447 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 01:34:47,447 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:34:47,447 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-27 01:34:47,447 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:34:47,447 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 01:34:47,447 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 01:34:47,447 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 01:34:47,448 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 01:34:47,448 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 12 22) the Hoare annotation is: true [2020-10-27 01:34:47,448 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 12 22) no Hoare annotation was computed. [2020-10-27 01:34:47,448 INFO L270 CegarLoopResult]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse1 (div main_~x~0 4294967296))) (or (let ((.cse0 (+ (* 4294967296 .cse1) 6))) (and (<= .cse0 main_~x~0) (<= main_~x~0 .cse0))) (and (< 0 (+ .cse1 1)) (<= main_~x~0 5)))) [2020-10-27 01:34:47,448 INFO L270 CegarLoopResult]: At program point L16-3(lines 16 19) the Hoare annotation is: (let ((.cse0 (+ (* 4294967296 (div main_~x~0 4294967296)) 6))) (and (<= .cse0 main_~x~0) (<= main_~x~0 .cse0))) [2020-10-27 01:34:47,448 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 12 22) no Hoare annotation was computed. [2020-10-27 01:34:47,448 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-10-27 01:34:47,448 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-10-27 01:34:47,449 INFO L270 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-10-27 01:34:47,449 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-10-27 01:34:47,449 INFO L274 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-10-27 01:34:47,449 INFO L274 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-10-27 01:34:47,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:34:47 BoogieIcfgContainer [2020-10-27 01:34:47,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:34:47,468 INFO L168 Benchmark]: Toolchain (without parser) took 7218.64 ms. Allocated memory was 155.2 MB in the beginning and 231.7 MB in the end (delta: 76.5 MB). Free memory was 130.4 MB in the beginning and 208.5 MB in the end (delta: -78.1 MB). Peak memory consumption was 129.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:47,469 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 125.8 MB. Free memory was 80.2 MB in the beginning and 79.9 MB in the end (delta: 361.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:34:47,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.28 ms. Allocated memory is still 155.2 MB. Free memory was 129.7 MB in the beginning and 120.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:47,470 INFO L168 Benchmark]: Boogie Preprocessor took 33.78 ms. Allocated memory is still 155.2 MB. Free memory was 120.7 MB in the beginning and 119.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:47,471 INFO L168 Benchmark]: RCFGBuilder took 513.91 ms. Allocated memory is still 155.2 MB. Free memory was 119.2 MB in the beginning and 107.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:47,472 INFO L168 Benchmark]: TraceAbstraction took 6367.73 ms. Allocated memory was 155.2 MB in the beginning and 231.7 MB in the end (delta: 76.5 MB). Free memory was 106.9 MB in the beginning and 208.5 MB in the end (delta: -101.6 MB). Peak memory consumption was 106.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:47,476 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 125.8 MB. Free memory was 80.2 MB in the beginning and 79.9 MB in the end (delta: 361.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 290.28 ms. Allocated memory is still 155.2 MB. Free memory was 129.7 MB in the beginning and 120.7 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.78 ms. Allocated memory is still 155.2 MB. Free memory was 120.7 MB in the beginning and 119.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 513.91 ms. Allocated memory is still 155.2 MB. Free memory was 119.2 MB in the beginning and 107.3 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6367.73 ms. Allocated memory was 155.2 MB in the beginning and 231.7 MB in the end (delta: 76.5 MB). Free memory was 106.9 MB in the beginning and 208.5 MB in the end (delta: -101.6 MB). Peak memory consumption was 106.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (4294967296 * (x / 4294967296) + 6 <= x && x <= 4294967296 * (x / 4294967296) + 6) || (0 < x / 4294967296 + 1 && x <= 5) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.8s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 90 SDtfs, 55 SDslu, 159 SDs, 0 SdLazy, 236 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 32 PreInvPairs, 40 NumberOfFragments, 90 HoareAnnotationTreeSize, 32 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 515 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 109 ConstructedInterpolants, 0 QuantifiedInterpolants, 8577 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 11/56 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...