/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/loops-crafted-1/mono-crafted_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:52:01,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:52:01,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:52:01,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:52:01,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:52:01,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:52:01,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:52:01,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:52:01,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:52:01,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:52:01,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:52:01,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:52:01,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:52:01,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:52:01,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:52:01,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:52:01,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:52:01,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:52:01,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:52:01,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:52:01,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:52:01,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:52:01,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:52:01,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:52:01,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:52:01,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:52:01,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:52:01,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:52:01,474 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:52:01,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:52:01,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:52:01,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:52:01,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:52:01,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:52:01,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:52:01,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:52:01,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:52:01,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:52:01,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:52:01,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:52:01,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:52:01,486 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 01:52:01,511 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:52:01,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:52:01,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:52:01,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:52:01,513 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:52:01,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:52:01,514 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:52:01,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:52:01,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:52:01,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:52:01,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:52:01,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:52:01,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:52:01,516 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:52:01,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:52:01,516 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:52:01,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:52:01,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:52:01,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:52:01,517 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:52:01,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:52:01,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:52:01,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:52:01,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:52:01,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:52:01,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:52:01,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:52:01,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:52:01,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:52:01,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:52:01,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:52:01,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:52:01,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:52:01,978 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:52:01,979 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:52:01,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2020-10-27 01:52:02,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91b48193e/c49a3e8765b14f9dbd7c4511c9d755f2/FLAGd20336b80 [2020-10-27 01:52:02,665 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:52:02,666 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2020-10-27 01:52:02,672 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91b48193e/c49a3e8765b14f9dbd7c4511c9d755f2/FLAGd20336b80 [2020-10-27 01:52:03,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91b48193e/c49a3e8765b14f9dbd7c4511c9d755f2 [2020-10-27 01:52:03,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:52:03,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:52:03,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:52:03,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:52:03,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:52:03,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:52:03" (1/1) ... [2020-10-27 01:52:03,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d84a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:03, skipping insertion in model container [2020-10-27 01:52:03,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:52:03" (1/1) ... [2020-10-27 01:52:03,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:52:03,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:52:03,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:52:03,272 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:52:03,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:52:03,300 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:52:03,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:03 WrapperNode [2020-10-27 01:52:03,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:52:03,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:52:03,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:52:03,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:52:03,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:03" (1/1) ... [2020-10-27 01:52:03,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:03" (1/1) ... [2020-10-27 01:52:03,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:03" (1/1) ... [2020-10-27 01:52:03,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:03" (1/1) ... [2020-10-27 01:52:03,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:03" (1/1) ... [2020-10-27 01:52:03,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:03" (1/1) ... [2020-10-27 01:52:03,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:03" (1/1) ... [2020-10-27 01:52:03,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:52:03,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:52:03,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:52:03,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:52:03,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:03" (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 01:52:03,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:52:03,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:52:03,407 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:52:03,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:52:03,408 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:52:03,408 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:52:03,408 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:52:03,408 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:52:03,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:52:03,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:52:03,409 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:52:03,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:52:03,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:52:03,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:52:03,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:52:03,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:52:03,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:52:03,653 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:52:03,653 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:52:03,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:52:03 BoogieIcfgContainer [2020-10-27 01:52:03,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:52:03,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:52:03,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:52:03,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:52:03,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:52:03" (1/3) ... [2020-10-27 01:52:03,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a8941a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:52:03, skipping insertion in model container [2020-10-27 01:52:03,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:52:03" (2/3) ... [2020-10-27 01:52:03,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a8941a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:52:03, skipping insertion in model container [2020-10-27 01:52:03,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:52:03" (3/3) ... [2020-10-27 01:52:03,666 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.c [2020-10-27 01:52:03,680 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:52:03,685 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:52:03,701 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:52:03,731 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:52:03,731 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:52:03,732 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:52:03,732 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:52:03,732 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:52:03,732 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:52:03,732 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:52:03,732 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:52:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 01:52:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:52:03,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:03,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:03,759 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:03,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:03,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1507135652, now seen corresponding path program 1 times [2020-10-27 01:52:03,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:03,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657270190] [2020-10-27 01:52:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:04,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:04,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:04,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:52:04,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:04,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-27 01:52:04,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:04,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:04,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:52:04,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:04,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:52:04,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:04,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:04,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:04,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:04,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:04,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:52:04,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:04,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:04,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:04,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:04,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:04,295 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 01:52:04,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657270190] [2020-10-27 01:52:04,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:52:04,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:52:04,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957363041] [2020-10-27 01:52:04,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:52:04,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:04,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:52:04,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:52:04,321 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 01:52:04,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:04,387 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-27 01:52:04,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:52:04,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 01:52:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:04,397 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:52:04,397 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 01:52:04,400 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 01:52:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 01:52:04,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 01:52:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:52:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-27 01:52:04,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-27 01:52:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:04,444 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-27 01:52:04,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:52:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-27 01:52:04,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:52:04,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:04,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:04,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:52:04,445 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:04,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:04,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1192214991, now seen corresponding path program 1 times [2020-10-27 01:52:04,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:04,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762751651] [2020-10-27 01:52:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:04,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:04,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:04,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:52:04,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:04,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 01:52:04,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:04,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:52:04,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:04,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:52:04,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:04,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:04,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:04,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:04,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:04,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:04,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:52:04,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:04,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:04,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:04,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:04,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:04,691 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 01:52:04,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762751651] [2020-10-27 01:52:04,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:52:04,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:52:04,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216361898] [2020-10-27 01:52:04,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:52:04,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:04,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:52:04,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:52:04,696 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-27 01:52:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:04,798 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-27 01:52:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:52:04,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 01:52:04,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:04,800 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:52:04,800 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:52:04,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:52:04,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:52:04,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-27 01:52:04,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:52:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 01:52:04,815 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-27 01:52:04,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:04,816 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 01:52:04,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:52:04,816 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 01:52:04,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:52:04,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:04,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:04,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:52:04,818 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:04,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1953512822, now seen corresponding path program 1 times [2020-10-27 01:52:04,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:04,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987067512] [2020-10-27 01:52:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:04,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:04,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:05,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:05,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:52:05,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:05,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-27 01:52:05,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:52:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:52:05,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 01:52:05,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:05,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:05,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:05,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:05,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:05,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:52:05,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:05,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:05,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:05,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:05,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:05,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987067512] [2020-10-27 01:52:05,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:52:05,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:52:05,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653151181] [2020-10-27 01:52:05,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:52:05,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:05,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:52:05,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:52:05,226 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-27 01:52:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:05,307 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-27 01:52:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:52:05,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 01:52:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:05,308 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:52:05,309 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:52:05,309 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 01:52:05,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:52:05,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 01:52:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:52:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 01:52:05,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-10-27 01:52:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:05,317 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 01:52:05,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:52:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 01:52:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:52:05,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:05,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:05,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:52:05,319 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:05,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:05,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1532107848, now seen corresponding path program 1 times [2020-10-27 01:52:05,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:05,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207748739] [2020-10-27 01:52:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:05,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:05,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:05,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:52:05,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:05,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-27 01:52:05,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:05,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:52:05,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:05,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:52:05,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:05,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:05,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:05,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:05,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:05,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:05,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:52:05,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:05,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:05,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:05,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:05,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:52:05,605 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 01:52:05,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207748739] [2020-10-27 01:52:05,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:05,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:52:05,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867228186] [2020-10-27 01:52:05,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:52:05,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:05,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:52:05,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:52:05,614 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-27 01:52:05,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:05,761 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-27 01:52:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:52:05,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-27 01:52:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:05,762 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:52:05,763 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:52:05,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:52:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:52:05,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-27 01:52:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:52:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 01:52:05,770 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-10-27 01:52:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:05,771 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 01:52:05,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:52:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 01:52:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:52:05,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:05,772 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:05,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:52:05,772 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:05,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:05,773 INFO L82 PathProgramCache]: Analyzing trace with hash 556673393, now seen corresponding path program 1 times [2020-10-27 01:52:05,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:05,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932629970] [2020-10-27 01:52:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:05,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:05,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:06,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:06,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:52:06,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:06,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 01:52:06,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:06,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:52:06,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:06,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:52:06,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:52:06,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:06,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:06,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:06,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:06,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:06,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:52:06,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:06,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:06,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:06,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:06,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:06,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932629970] [2020-10-27 01:52:06,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:06,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:52:06,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110124539] [2020-10-27 01:52:06,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:52:06,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:06,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:52:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:52:06,126 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-27 01:52:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:06,247 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-27 01:52:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:52:06,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-27 01:52:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:06,249 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:52:06,249 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:52:06,249 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 01:52:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:52:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 01:52:06,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:52:06,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-27 01:52:06,256 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-10-27 01:52:06,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:06,256 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-27 01:52:06,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:52:06,256 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-27 01:52:06,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:52:06,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:06,257 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:06,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:52:06,258 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:06,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:06,258 INFO L82 PathProgramCache]: Analyzing trace with hash -252673233, now seen corresponding path program 2 times [2020-10-27 01:52:06,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:06,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828464643] [2020-10-27 01:52:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:06,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:06,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:06,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:06,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:52:06,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:06,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-27 01:52:06,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:06,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:52:06,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:06,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:52:06,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:06,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:06,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:06,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:06,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:06,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:06,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:52:06,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:06,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:06,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:06,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:06,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:06,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828464643] [2020-10-27 01:52:06,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:06,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:52:06,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635198120] [2020-10-27 01:52:06,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:52:06,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:06,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:52:06,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:52:06,609 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-27 01:52:06,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:06,802 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-27 01:52:06,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:52:06,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:52:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:06,803 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:52:06,803 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:52:06,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:52:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:52:06,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-27 01:52:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:52:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 01:52:06,810 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-27 01:52:06,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:06,811 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 01:52:06,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:52:06,811 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 01:52:06,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:52:06,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:06,812 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:06,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:52:06,812 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:06,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1838613802, now seen corresponding path program 2 times [2020-10-27 01:52:06,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:06,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770404609] [2020-10-27 01:52:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:06,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:06,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:06,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:07,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:07,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:52:07,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:07,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-27 01:52:07,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:07,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:52:07,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:07,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:52:07,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:07,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:07,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:07,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:07,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:07,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:07,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:52:07,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:07,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:07,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:07,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:07,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:07,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770404609] [2020-10-27 01:52:07,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:07,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:52:07,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166598253] [2020-10-27 01:52:07,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:52:07,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:07,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:52:07,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:52:07,274 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-10-27 01:52:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:07,459 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-10-27 01:52:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:52:07,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 01:52:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:07,460 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:52:07,460 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:52:07,461 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 01:52:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:52:07,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-27 01:52:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:52:07,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-27 01:52:07,474 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-27 01:52:07,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:07,475 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-27 01:52:07,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:52:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-27 01:52:07,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:52:07,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:07,478 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:07,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:52:07,478 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:07,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1029267176, now seen corresponding path program 3 times [2020-10-27 01:52:07,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:07,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928995071] [2020-10-27 01:52:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:07,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:07,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:07,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:07,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:07,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:52:07,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:52:07,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-27 01:52:07,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:52:07,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:07,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:52:07,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:07,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:07,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:07,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:07,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:07,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:07,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:52:07,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:07,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:07,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:07,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:07,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:07,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928995071] [2020-10-27 01:52:07,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:07,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:52:07,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981124712] [2020-10-27 01:52:07,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:52:07,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:07,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:52:07,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:52:07,964 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-10-27 01:52:08,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:08,236 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-27 01:52:08,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:52:08,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 01:52:08,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:08,239 INFO L225 Difference]: With dead ends: 33 [2020-10-27 01:52:08,240 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:52:08,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:52:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:52:08,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-27 01:52:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:52:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 01:52:08,247 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2020-10-27 01:52:08,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:08,248 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 01:52:08,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:52:08,248 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 01:52:08,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:52:08,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:08,249 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:08,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:52:08,249 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:08,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:08,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1276142289, now seen corresponding path program 3 times [2020-10-27 01:52:08,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:08,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166108071] [2020-10-27 01:52:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:08,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:08,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:08,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:08,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:08,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:08,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:52:08,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:52:08,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 646 [2020-10-27 01:52:08,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:08,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:52:08,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:08,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:52:08,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:09,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:09,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:09,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:09,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:09,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:09,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:52:09,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:09,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:09,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:09,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:09,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:09,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166108071] [2020-10-27 01:52:09,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:09,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:52:09,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646530469] [2020-10-27 01:52:09,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:52:09,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:09,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:52:09,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:52:09,190 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-10-27 01:52:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:09,608 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-27 01:52:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:52:09,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-27 01:52:09,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:09,611 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:52:09,611 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:52:09,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:52:09,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:52:09,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-27 01:52:09,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:52:09,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-27 01:52:09,619 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2020-10-27 01:52:09,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:09,620 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-27 01:52:09,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:52:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-27 01:52:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:52:09,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:09,621 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:09,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:52:09,621 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:09,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:09,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1346344376, now seen corresponding path program 4 times [2020-10-27 01:52:09,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:09,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458859672] [2020-10-27 01:52:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:09,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:09,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:09,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:10,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:10,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:11,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:11,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:52:11,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:52:11,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1608 [2020-10-27 01:52:11,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:11,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:52:11,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:11,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:52:11,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:11,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:11,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:11,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:11,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:11,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:11,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:52:11,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:11,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:11,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:11,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:11,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:11,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458859672] [2020-10-27 01:52:11,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:11,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:52:11,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343074082] [2020-10-27 01:52:11,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:52:11,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:11,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:52:11,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:52:11,392 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-27 01:52:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:11,678 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-27 01:52:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:52:11,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 01:52:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:11,679 INFO L225 Difference]: With dead ends: 41 [2020-10-27 01:52:11,680 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:52:11,680 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 01:52:11,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:52:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-27 01:52:11,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:52:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-27 01:52:11,692 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2020-10-27 01:52:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:11,692 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-27 01:52:11,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:52:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-27 01:52:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:52:11,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:11,694 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:11,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:52:11,695 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:11,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:11,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1454626424, now seen corresponding path program 4 times [2020-10-27 01:52:11,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:11,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620026745] [2020-10-27 01:52:11,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:11,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:11,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:11,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:11,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:11,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:12,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:12,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:52:12,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:52:12,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1085 [2020-10-27 01:52:12,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:12,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:52:12,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:12,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:52:12,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:12,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:12,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:12,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:12,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:12,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:12,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:52:12,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:12,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:12,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:12,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:12,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 01:52:12,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620026745] [2020-10-27 01:52:12,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:12,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:52:12,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382678341] [2020-10-27 01:52:12,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:52:12,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:12,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:52:12,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:52:12,907 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2020-10-27 01:52:15,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:15,203 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-27 01:52:15,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:52:15,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-27 01:52:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:15,205 INFO L225 Difference]: With dead ends: 39 [2020-10-27 01:52:15,205 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:52:15,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:52:15,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:52:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-27 01:52:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:52:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-27 01:52:15,212 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 27 [2020-10-27 01:52:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:15,213 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-27 01:52:15,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:52:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-27 01:52:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:52:15,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:15,214 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:15,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:52:15,214 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:15,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:15,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1593447473, now seen corresponding path program 5 times [2020-10-27 01:52:15,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:15,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209319204] [2020-10-27 01:52:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:15,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:15,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:15,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:15,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:15,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:15,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:17,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:17,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:52:17,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:52:17,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2490 [2020-10-27 01:52:17,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:17,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:52:17,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:17,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 01:52:17,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:52:18,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:18,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:18,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:18,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:18,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:18,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:52:18,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:18,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:18,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:18,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:18,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:18,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209319204] [2020-10-27 01:52:18,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:18,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:52:18,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986938328] [2020-10-27 01:52:18,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:52:18,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:18,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:52:18,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:52:18,162 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2020-10-27 01:52:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:18,744 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-10-27 01:52:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:52:18,744 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-27 01:52:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:18,745 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:52:18,745 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:52:18,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:52:18,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:52:18,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-10-27 01:52:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-27 01:52:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-27 01:52:18,765 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2020-10-27 01:52:18,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:18,766 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-27 01:52:18,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:52:18,766 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-27 01:52:18,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:52:18,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:18,772 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:18,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:52:18,772 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:18,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1730626328, now seen corresponding path program 6 times [2020-10-27 01:52:18,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:18,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971144427] [2020-10-27 01:52:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:18,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:18,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:18,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:18,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:19,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:19,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:19,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:22,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:22,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:52:22,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:52:22,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3485 [2020-10-27 01:52:22,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:22,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:52:22,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:22,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:52:22,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:22,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:22,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:22,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:22,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:22,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:22,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:52:22,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:22,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:22,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:22,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:22,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:52:22,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971144427] [2020-10-27 01:52:22,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:22,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:52:22,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980828529] [2020-10-27 01:52:22,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:52:22,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:22,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:52:22,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:52:22,621 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 9 states. [2020-10-27 01:52:24,775 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 01:52:24,974 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-27 01:52:25,205 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-27 01:52:32,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:32,057 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-10-27 01:52:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:52:32,058 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-27 01:52:32,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:32,061 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:52:32,061 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:52:32,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=129, Invalid=248, Unknown=3, NotChecked=0, Total=380 [2020-10-27 01:52:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:52:32,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2020-10-27 01:52:32,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:52:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-27 01:52:32,073 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 33 [2020-10-27 01:52:32,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:32,073 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-27 01:52:32,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:52:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-27 01:52:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:52:32,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:32,074 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:32,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:52:32,075 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:32,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:32,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1178515384, now seen corresponding path program 7 times [2020-10-27 01:52:32,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:32,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229455751] [2020-10-27 01:52:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:32,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:32,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:32,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:32,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:32,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:33,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:33,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:33,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:33,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:37,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:37,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:52:37,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:52:37,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:52:37,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:37,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:52:37,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:37,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:52:37,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:39,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:39,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:39,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:39,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:39,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:39,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:52:39,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:39,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:39,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 107 refuted. 3 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:52:39,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229455751] [2020-10-27 01:52:39,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:39,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:52:39,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908455070] [2020-10-27 01:52:39,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:52:39,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:39,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:52:39,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=103, Unknown=1, NotChecked=0, Total=132 [2020-10-27 01:52:39,709 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 12 states. [2020-10-27 01:52:40,353 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 01:52:40,576 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-27 01:52:43,216 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-27 01:52:47,545 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-27 01:52:48,311 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-27 01:52:50,379 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-27 01:52:52,751 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2020-10-27 01:52:53,156 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2020-10-27 01:52:55,835 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-10-27 01:53:00,907 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-27 01:53:03,560 WARN L193 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-27 01:53:07,641 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2020-10-27 01:53:12,504 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-27 01:53:17,008 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-27 01:53:34,850 WARN L193 SmtUtils]: Spent 9.36 s on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2020-10-27 01:53:43,296 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296))))) is different from false [2020-10-27 01:53:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:49,958 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2020-10-27 01:53:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:53:49,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-27 01:53:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:49,961 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:53:49,961 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 01:53:49,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=8, NotChecked=130, Total=1260 [2020-10-27 01:53:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 01:53:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2020-10-27 01:53:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:53:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2020-10-27 01:53:49,981 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 39 [2020-10-27 01:53:49,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:49,981 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2020-10-27 01:53:49,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:53:49,981 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2020-10-27 01:53:49,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:53:49,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:49,983 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:49,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:53:49,983 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:49,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1819131409, now seen corresponding path program 8 times [2020-10-27 01:53:49,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:49,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233271219] [2020-10-27 01:53:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:50,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:50,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:50,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:50,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:50,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:51,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:51,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:51,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:51,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:51,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:52,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:52,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:55,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:55,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:53:55,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 01:53:55,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:53:55,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:55,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:53:55,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:53:55,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:53:55,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:55,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:53:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:55,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:55,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:53:55,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:53:55,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:53:55,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:53:55,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:53:55,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:53:55,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:53:55,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:53:55,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:53:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 113 proven. 57 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-27 01:53:55,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233271219] [2020-10-27 01:53:55,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:53:55,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:53:55,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448088439] [2020-10-27 01:53:55,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:53:55,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:53:55,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:53:55,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:53:55,251 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand 10 states. [2020-10-27 01:53:55,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:53:55,773 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2020-10-27 01:53:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:53:55,774 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-10-27 01:53:55,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:53:55,775 INFO L225 Difference]: With dead ends: 109 [2020-10-27 01:53:55,775 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 01:53:55,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:53:55,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 01:53:55,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-27 01:53:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:53:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-27 01:53:55,800 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 48 [2020-10-27 01:53:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:53:55,801 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-27 01:53:55,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:53:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-27 01:53:55,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:53:55,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:53:55,802 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:53:55,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:53:55,803 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:53:55,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:53:55,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1443935816, now seen corresponding path program 9 times [2020-10-27 01:53:55,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:53:55,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228329144] [2020-10-27 01:53:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:53:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:53:55,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:55,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:55,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:55,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:56,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:56,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:57,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:58,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:58,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:58,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:58,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:58,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:53:58,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:00,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:00,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:54:00,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 01:54:00,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:54:00,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:00,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:54:00,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:54:00,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:54:00,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:01,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:54:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:54:01,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:54:01,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:54:01,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:54:01,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:54:01,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:54:01,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:54:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:54:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:54:01,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:54:01,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:54:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:54:01,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228329144] [2020-10-27 01:54:01,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:54:01,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:54:01,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434108002] [2020-10-27 01:54:01,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:54:01,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:54:01,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:54:01,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:54:01,767 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 17 states. [2020-10-27 01:54:08,597 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 55 [2020-10-27 01:54:08,892 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 01:54:15,309 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-27 01:54:15,706 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-27 01:54:15,993 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-27 01:54:18,515 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-27 01:54:19,707 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-27 01:54:24,556 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2020-10-27 01:54:31,205 WARN L193 SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2020-10-27 01:54:38,581 WARN L193 SmtUtils]: Spent 4.87 s on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-10-27 01:54:41,529 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 55 [2020-10-27 01:54:42,917 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 55 [2020-10-27 01:54:44,893 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 53 [2020-10-27 01:54:53,299 WARN L193 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 119 DAG size of output: 55 [2020-10-27 01:54:57,720 WARN L193 SmtUtils]: Spent 3.76 s on a formula simplification. DAG size of input: 103 DAG size of output: 55 [2020-10-27 01:55:06,806 WARN L193 SmtUtils]: Spent 6.67 s on a formula simplification. DAG size of input: 133 DAG size of output: 53 [2020-10-27 01:55:08,865 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296))))) is different from false [2020-10-27 01:55:10,917 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2020-10-27 01:55:21,712 WARN L193 SmtUtils]: Spent 8.76 s on a formula simplification. DAG size of input: 81 DAG size of output: 25 [2020-10-27 01:55:23,742 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999990) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 11)) 4294967296)))) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296))))) is different from false [2020-10-27 01:55:26,422 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2020-10-27 01:55:28,276 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2020-10-27 01:55:28,835 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-10-27 01:55:33,017 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296))))) is different from false [2020-10-27 01:55:35,560 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-27 01:55:40,432 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 25 [2020-10-27 01:55:53,638 WARN L193 SmtUtils]: Spent 6.98 s on a formula simplification. DAG size of input: 119 DAG size of output: 55 [2020-10-27 01:56:01,944 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2020-10-27 01:56:03,998 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296))))) is different from false [2020-10-27 01:56:06,884 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-27 01:56:17,876 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 25