/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=DEEPEST --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/eureka_01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:32:15,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:32:15,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:32:15,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:32:15,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:32:15,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:32:15,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:32:15,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:32:15,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:32:15,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:32:15,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:32:15,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:32:15,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:32:15,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:32:15,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:32:15,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:32:15,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:32:15,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:32:15,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:32:15,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:32:15,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:32:15,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:32:15,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:32:15,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:32:15,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:32:15,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:32:15,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:32:15,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:32:15,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:32:15,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:32:15,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:32:15,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:32:15,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:32:15,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:32:15,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:32:15,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:32:15,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:32:15,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:32:15,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:32:15,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:32:15,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:32:15,454 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:32:15,506 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:32:15,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:32:15,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:32:15,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:32:15,511 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:32:15,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:32:15,512 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:32:15,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:32:15,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:32:15,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:32:15,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:32:15,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:32:15,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:32:15,514 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:32:15,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:32:15,515 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:32:15,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:32:15,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:32:15,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:32:15,515 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:32:15,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:32:15,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:32:15,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:32:15,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:32:15,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:32:15,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:32:15,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:32:15,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:32:15,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:32:15,518 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:32:15,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:32:15,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:32:15,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:32:15,979 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:32:15,980 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:32:15,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-1.c [2020-10-27 20:32:16,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/675b206d6/a581f5ada0154337a771fad5607cea11/FLAG3eb145657 [2020-10-27 20:32:16,821 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:32:16,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/eureka_01-1.c [2020-10-27 20:32:16,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/675b206d6/a581f5ada0154337a771fad5607cea11/FLAG3eb145657 [2020-10-27 20:32:16,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/675b206d6/a581f5ada0154337a771fad5607cea11 [2020-10-27 20:32:16,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:32:16,855 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:32:16,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:32:16,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:32:16,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:32:16,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:32:16" (1/1) ... [2020-10-27 20:32:16,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69a192ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:16, skipping insertion in model container [2020-10-27 20:32:16,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:32:16" (1/1) ... [2020-10-27 20:32:16,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:32:16,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:32:17,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:32:17,170 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:32:17,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:32:17,259 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:32:17,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:17 WrapperNode [2020-10-27 20:32:17,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:32:17,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:32:17,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:32:17,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:32:17,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:17" (1/1) ... [2020-10-27 20:32:17,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:17" (1/1) ... [2020-10-27 20:32:17,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:17" (1/1) ... [2020-10-27 20:32:17,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:17" (1/1) ... [2020-10-27 20:32:17,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:17" (1/1) ... [2020-10-27 20:32:17,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:17" (1/1) ... [2020-10-27 20:32:17,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:17" (1/1) ... [2020-10-27 20:32:17,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:32:17,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:32:17,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:32:17,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:32:17,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:17" (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 20:32:17,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:32:17,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:32:17,449 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 20:32:17,449 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:32:17,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:32:17,451 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:32:17,451 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:32:17,451 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 20:32:17,451 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:32:17,451 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:32:17,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:32:17,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:32:17,453 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:32:17,453 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:32:17,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:32:17,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:32:17,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:32:17,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:32:17,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:32:17,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:32:18,084 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:32:18,084 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 20:32:18,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:32:18 BoogieIcfgContainer [2020-10-27 20:32:18,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:32:18,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:32:18,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:32:18,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:32:18,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:32:16" (1/3) ... [2020-10-27 20:32:18,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7ff049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:32:18, skipping insertion in model container [2020-10-27 20:32:18,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:32:17" (2/3) ... [2020-10-27 20:32:18,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7ff049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:32:18, skipping insertion in model container [2020-10-27 20:32:18,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:32:18" (3/3) ... [2020-10-27 20:32:18,097 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2020-10-27 20:32:18,110 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:32:18,116 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:32:18,130 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:32:18,157 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:32:18,157 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:32:18,157 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:32:18,157 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:32:18,157 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:32:18,158 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:32:18,158 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:32:18,158 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:32:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-27 20:32:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:32:18,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:18,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:18,185 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1323235863, now seen corresponding path program 1 times [2020-10-27 20:32:18,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:18,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472118033] [2020-10-27 20:32:18,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:18,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:18,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:18,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:18,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:18,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:32:18,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:32:18,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-27 20:32:18,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:32:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:18,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:32:19,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:19,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:19,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:19,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:19,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:19,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 20:32:19,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:19,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:19,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:19,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:19,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:19,108 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 20:32:19,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472118033] [2020-10-27 20:32:19,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:32:19,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:32:19,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067432048] [2020-10-27 20:32:19,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:32:19,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:19,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:32:19,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:32:19,135 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-10-27 20:32:19,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:19,272 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2020-10-27 20:32:19,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:32:19,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-27 20:32:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:19,283 INFO L225 Difference]: With dead ends: 70 [2020-10-27 20:32:19,283 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:32:19,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:32:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:32:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 20:32:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 20:32:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-27 20:32:19,331 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 20 [2020-10-27 20:32:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:19,332 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-27 20:32:19,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:32:19,332 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-27 20:32:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 20:32:19,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:19,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:19,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:32:19,334 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:19,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:19,335 INFO L82 PathProgramCache]: Analyzing trace with hash -120064893, now seen corresponding path program 1 times [2020-10-27 20:32:19,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:19,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229680308] [2020-10-27 20:32:19,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:19,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:19,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:20,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:20,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:32:20,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:20,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-27 20:32:20,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:20,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:32:20,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:32:20,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:32:20,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:20,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:20,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:20,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:20,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:20,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:20,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:32:20,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:20,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:20,116 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 20:32:20,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229680308] [2020-10-27 20:32:20,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:32:20,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:32:20,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89095303] [2020-10-27 20:32:20,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:32:20,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:20,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:32:20,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:32:20,120 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 6 states. [2020-10-27 20:32:20,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:20,341 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-10-27 20:32:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:32:20,341 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-27 20:32:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:20,344 INFO L225 Difference]: With dead ends: 82 [2020-10-27 20:32:20,344 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:32:20,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:32:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:32:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2020-10-27 20:32:20,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 20:32:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-27 20:32:20,359 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 20 [2020-10-27 20:32:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:20,359 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-27 20:32:20,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:32:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-27 20:32:20,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:32:20,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:20,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:20,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:32:20,361 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:20,362 INFO L82 PathProgramCache]: Analyzing trace with hash -8333369, now seen corresponding path program 1 times [2020-10-27 20:32:20,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:20,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169374048] [2020-10-27 20:32:20,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:20,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:20,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:20,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:20,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:32:20,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:20,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 399 [2020-10-27 20:32:20,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:20,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:32:20,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:20,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:32:20,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:20,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:20,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:20,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:20,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:20,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:20,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:32:20,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:20,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:20,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:20,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:20,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:32:20,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169374048] [2020-10-27 20:32:20,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:32:20,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:32:20,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113187837] [2020-10-27 20:32:20,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:32:20,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:20,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:32:20,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:32:20,849 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2020-10-27 20:32:20,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:20,948 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-27 20:32:20,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:32:20,949 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 20:32:20,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:20,950 INFO L225 Difference]: With dead ends: 63 [2020-10-27 20:32:20,950 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:32:20,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:32:20,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:32:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-27 20:32:20,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-27 20:32:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-27 20:32:20,958 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 26 [2020-10-27 20:32:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:20,959 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-27 20:32:20,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:32:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-27 20:32:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:32:20,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:20,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:20,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:32:20,960 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:20,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:20,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1580014533, now seen corresponding path program 1 times [2020-10-27 20:32:20,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:20,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840293807] [2020-10-27 20:32:20,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:21,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:21,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:21,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:21,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:32:21,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:21,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-27 20:32:21,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:21,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:32:21,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:32:21,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:32:21,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:32:21,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:21,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:21,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:21,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:21,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:21,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:32:21,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:21,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:21,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:21,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:21,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:32:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:21,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840293807] [2020-10-27 20:32:21,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:21,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:32:21,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891011611] [2020-10-27 20:32:21,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:32:21,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:21,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:32:21,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:32:21,933 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 14 states. [2020-10-27 20:32:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:23,122 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2020-10-27 20:32:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:32:23,123 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-27 20:32:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:23,125 INFO L225 Difference]: With dead ends: 101 [2020-10-27 20:32:23,125 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 20:32:23,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:32:23,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 20:32:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 56. [2020-10-27 20:32:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 20:32:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-10-27 20:32:23,148 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 26 [2020-10-27 20:32:23,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:23,148 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-10-27 20:32:23,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:32:23,149 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-10-27 20:32:23,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:32:23,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:23,151 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:23,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:32:23,151 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:23,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:23,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1263988540, now seen corresponding path program 2 times [2020-10-27 20:32:23,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:23,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681031776] [2020-10-27 20:32:23,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:23,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:23,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:24,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:24,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:32:24,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:24,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1611 [2020-10-27 20:32:24,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:24,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:32:24,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:24,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:32:24,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:24,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:24,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:24,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:24,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:24,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:24,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:32:24,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:24,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:24,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:24,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:24,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:32:24,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681031776] [2020-10-27 20:32:24,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:24,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:32:24,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38842729] [2020-10-27 20:32:24,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:32:24,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:24,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:32:24,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:32:24,901 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 8 states. [2020-10-27 20:32:25,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:25,238 INFO L93 Difference]: Finished difference Result 145 states and 183 transitions. [2020-10-27 20:32:25,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:32:25,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-27 20:32:25,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:25,240 INFO L225 Difference]: With dead ends: 145 [2020-10-27 20:32:25,241 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 20:32:25,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:32:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 20:32:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2020-10-27 20:32:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 20:32:25,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2020-10-27 20:32:25,267 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 29 [2020-10-27 20:32:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:25,270 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2020-10-27 20:32:25,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:32:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2020-10-27 20:32:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:32:25,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:25,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:25,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:32:25,273 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:25,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:25,274 INFO L82 PathProgramCache]: Analyzing trace with hash -372451243, now seen corresponding path program 1 times [2020-10-27 20:32:25,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:25,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310821884] [2020-10-27 20:32:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:25,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:25,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:26,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:26,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:32:26,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:26,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1288 [2020-10-27 20:32:26,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:26,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:32:26,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:32:26,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:32:26,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:26,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:26,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:26,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:26,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:26,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:26,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:32:26,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:26,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:26,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:26,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:26,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:32:26,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310821884] [2020-10-27 20:32:26,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:26,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:32:26,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512212540] [2020-10-27 20:32:26,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:32:26,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:26,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:32:26,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:32:26,674 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand 6 states. [2020-10-27 20:32:26,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:26,870 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-10-27 20:32:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:32:26,870 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-27 20:32:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:26,872 INFO L225 Difference]: With dead ends: 116 [2020-10-27 20:32:26,872 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 20:32:26,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:32:26,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 20:32:26,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2020-10-27 20:32:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:32:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2020-10-27 20:32:26,886 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 29 [2020-10-27 20:32:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:26,887 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2020-10-27 20:32:26,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:32:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2020-10-27 20:32:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:32:26,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:26,888 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:26,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:32:26,889 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:26,889 INFO L82 PathProgramCache]: Analyzing trace with hash 287350880, now seen corresponding path program 1 times [2020-10-27 20:32:26,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:26,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294327055] [2020-10-27 20:32:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:26,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:26,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:27,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:27,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:27,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:27,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:28,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:31,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:31,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:32:31,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:32:31,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4821 [2020-10-27 20:32:31,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:31,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:32:31,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:31,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 20:32:31,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:31,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:31,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:31,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:31,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:31,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:31,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:32:31,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:31,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:31,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:31,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:31,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:32:31,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294327055] [2020-10-27 20:32:31,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:31,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:32:31,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706711212] [2020-10-27 20:32:31,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:32:31,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:31,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:32:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:32:31,930 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand 10 states. [2020-10-27 20:32:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:32,362 INFO L93 Difference]: Finished difference Result 129 states and 162 transitions. [2020-10-27 20:32:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:32:32,363 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 20:32:32,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:32,366 INFO L225 Difference]: With dead ends: 129 [2020-10-27 20:32:32,366 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 20:32:32,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:32:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 20:32:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 91. [2020-10-27 20:32:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 20:32:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2020-10-27 20:32:32,399 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 29 [2020-10-27 20:32:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:32,400 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2020-10-27 20:32:32,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:32:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2020-10-27 20:32:32,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:32:32,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:32,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:32,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:32:32,405 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:32,406 INFO L82 PathProgramCache]: Analyzing trace with hash -2014780530, now seen corresponding path program 1 times [2020-10-27 20:32:32,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:32,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818700965] [2020-10-27 20:32:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:32,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:32,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:35,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:35,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:32:35,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:32:35,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2535 [2020-10-27 20:32:35,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:32:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 20:32:35,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:35,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:35,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:35,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:35,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:35,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:35,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:32:35,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:35,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:35,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:35,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:35,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:32:35,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818700965] [2020-10-27 20:32:35,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:35,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:32:35,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912698200] [2020-10-27 20:32:35,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:32:35,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:35,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:32:35,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:32:35,308 INFO L87 Difference]: Start difference. First operand 91 states and 114 transitions. Second operand 12 states. [2020-10-27 20:32:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:36,269 INFO L93 Difference]: Finished difference Result 253 states and 324 transitions. [2020-10-27 20:32:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:32:36,270 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-27 20:32:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:36,274 INFO L225 Difference]: With dead ends: 253 [2020-10-27 20:32:36,274 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 20:32:36,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:32:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 20:32:36,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 117. [2020-10-27 20:32:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 20:32:36,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 154 transitions. [2020-10-27 20:32:36,297 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 154 transitions. Word has length 32 [2020-10-27 20:32:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:36,298 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 154 transitions. [2020-10-27 20:32:36,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:32:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 154 transitions. [2020-10-27 20:32:36,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:32:36,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:36,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:36,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:32:36,300 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:36,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1967977502, now seen corresponding path program 2 times [2020-10-27 20:32:36,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:36,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612735209] [2020-10-27 20:32:36,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:36,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:36,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:37,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:37,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:41,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:41,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:32:41,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:32:41,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 20:32:41,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:32:41,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:32:41,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:32:41,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:41,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:41,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:41,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:41,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:41,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:41,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:32:41,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:41,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:41,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:41,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:41,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 20:32:41,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612735209] [2020-10-27 20:32:41,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:41,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:32:41,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874828668] [2020-10-27 20:32:41,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:32:41,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:41,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:32:41,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:32:41,448 INFO L87 Difference]: Start difference. First operand 117 states and 154 transitions. Second operand 8 states. [2020-10-27 20:32:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:41,790 INFO L93 Difference]: Finished difference Result 246 states and 321 transitions. [2020-10-27 20:32:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:32:41,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-27 20:32:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:41,793 INFO L225 Difference]: With dead ends: 246 [2020-10-27 20:32:41,793 INFO L226 Difference]: Without dead ends: 224 [2020-10-27 20:32:41,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:32:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-27 20:32:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 160. [2020-10-27 20:32:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 20:32:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 214 transitions. [2020-10-27 20:32:41,840 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 214 transitions. Word has length 35 [2020-10-27 20:32:41,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:41,840 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 214 transitions. [2020-10-27 20:32:41,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:32:41,840 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 214 transitions. [2020-10-27 20:32:41,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:32:41,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:41,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:41,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:32:41,848 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1232123927, now seen corresponding path program 1 times [2020-10-27 20:32:41,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:41,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800085429] [2020-10-27 20:32:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:41,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:41,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:42,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:43,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:43,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:44,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:44,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:46,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:46,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 20:32:46,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:32:46,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 20:32:46,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:32:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:32:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 20:32:46,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:46,978 ERROR L253 erpolLogProxyWrapper]: Interpolant 15 not inductive [2020-10-27 20:32:46,984 ERROR L253 erpolLogProxyWrapper]: Interpolant 20 not inductive [2020-10-27 20:32:46,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:32:46,993 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-27 20:32:47,000 INFO L168 Benchmark]: Toolchain (without parser) took 30148.29 ms. Allocated memory was 125.8 MB in the beginning and 481.3 MB in the end (delta: 355.5 MB). Free memory was 101.1 MB in the beginning and 385.0 MB in the end (delta: -283.9 MB). Peak memory consumption was 235.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:32:47,001 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 100.3 MB in the end (delta: 73.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:32:47,001 INFO L168 Benchmark]: CACSL2BoogieTranslator took 403.69 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 88.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-27 20:32:47,002 INFO L168 Benchmark]: Boogie Preprocessor took 63.11 ms. Allocated memory is still 125.8 MB. Free memory was 88.9 MB in the beginning and 86.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 20:32:47,005 INFO L168 Benchmark]: RCFGBuilder took 757.13 ms. Allocated memory was 125.8 MB in the beginning and 158.3 MB in the end (delta: 32.5 MB). Free memory was 86.8 MB in the beginning and 130.2 MB in the end (delta: -43.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:32:47,006 INFO L168 Benchmark]: TraceAbstraction took 28908.83 ms. Allocated memory was 158.3 MB in the beginning and 481.3 MB in the end (delta: 323.0 MB). Free memory was 129.9 MB in the beginning and 385.0 MB in the end (delta: -255.2 MB). Peak memory consumption was 231.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:32:47,011 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 100.3 MB in the end (delta: 73.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 403.69 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 88.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.11 ms. Allocated memory is still 125.8 MB. Free memory was 88.9 MB in the beginning and 86.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 757.13 ms. Allocated memory was 125.8 MB in the beginning and 158.3 MB in the end (delta: 32.5 MB). Free memory was 86.8 MB in the beginning and 130.2 MB in the end (delta: -43.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 28908.83 ms. Allocated memory was 158.3 MB in the beginning and 481.3 MB in the end (delta: 323.0 MB). Free memory was 129.9 MB in the beginning and 385.0 MB in the end (delta: -255.2 MB). Peak memory consumption was 231.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...