/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:00:55,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:00:55,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:00:55,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:00:55,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:00:55,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:00:55,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:00:55,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:00:55,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:00:55,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:00:55,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:00:55,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:00:55,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:00:55,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:00:55,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:00:55,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:00:55,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:00:55,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:00:55,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:00:55,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:00:55,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:00:55,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:00:55,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:00:55,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:00:55,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:00:55,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:00:55,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:00:55,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:00:55,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:00:55,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:00:55,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:00:55,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:00:55,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:00:55,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:00:55,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:00:55,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:00:55,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:00:55,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:00:55,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:00:55,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:00:55,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:00:55,479 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:00:55,541 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:00:55,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:00:55,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:00:55,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:00:55,546 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:00:55,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:00:55,547 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:00:55,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:00:55,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:00:55,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:00:55,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:00:55,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:00:55,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:00:55,549 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:00:55,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:00:55,549 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:00:55,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:00:55,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:00:55,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:00:55,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:00:55,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:00:55,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:00:55,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:00:55,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:00:55,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:00:55,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:00:55,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:00:55,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:00:55,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:00:55,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:00:55,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:00:55,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:00:55,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:00:55,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:00:55,967 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:00:55,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i.v+nlh-reducer.c [2020-10-28 15:00:56,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4790201ef/20aca53e19d74333a3eff140e6f12632/FLAG38733aa5f [2020-10-28 15:00:56,660 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:00:56,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/apache-get-tag.i.v+nlh-reducer.c [2020-10-28 15:00:56,672 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4790201ef/20aca53e19d74333a3eff140e6f12632/FLAG38733aa5f [2020-10-28 15:00:57,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4790201ef/20aca53e19d74333a3eff140e6f12632 [2020-10-28 15:00:57,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:00:57,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:00:57,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:00:57,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:00:57,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:00:57,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:00:57" (1/1) ... [2020-10-28 15:00:57,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33014f0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:00:57, skipping insertion in model container [2020-10-28 15:00:57,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:00:57" (1/1) ... [2020-10-28 15:00:57,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:00:57,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:00:57,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:00:57,394 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:00:57,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:00:57,455 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:00:57,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:00:57 WrapperNode [2020-10-28 15:00:57,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:00:57,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:00:57,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:00:57,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:00:57,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:00:57" (1/1) ... [2020-10-28 15:00:57,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:00:57" (1/1) ... [2020-10-28 15:00:57,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:00:57" (1/1) ... [2020-10-28 15:00:57,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:00:57" (1/1) ... [2020-10-28 15:00:57,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:00:57" (1/1) ... [2020-10-28 15:00:57,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:00:57" (1/1) ... [2020-10-28 15:00:57,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:00:57" (1/1) ... [2020-10-28 15:00:57,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:00:57,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:00:57,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:00:57,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:00:57,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:00:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:00:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:00:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:00:57,588 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:00:57,589 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:00:57,589 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:00:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:00:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:00:57,589 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:00:57,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:00:57,590 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:00:57,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:00:57,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:00:57,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:00:57,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:00:57,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:00:57,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:00:57,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:00:57,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:00:57,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:00:58,251 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:00:58,251 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 15:00:58,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:00:58 BoogieIcfgContainer [2020-10-28 15:00:58,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:00:58,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:00:58,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:00:58,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:00:58,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:00:57" (1/3) ... [2020-10-28 15:00:58,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a3d9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:00:58, skipping insertion in model container [2020-10-28 15:00:58,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:00:57" (2/3) ... [2020-10-28 15:00:58,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a3d9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:00:58, skipping insertion in model container [2020-10-28 15:00:58,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:00:58" (3/3) ... [2020-10-28 15:00:58,263 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i.v+nlh-reducer.c [2020-10-28 15:00:58,275 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:00:58,284 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:00:58,298 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:00:58,328 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:00:58,328 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:00:58,329 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:00:58,329 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:00:58,329 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:00:58,329 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:00:58,329 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:00:58,329 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:00:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2020-10-28 15:00:58,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:00:58,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:00:58,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:00:58,357 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:00:58,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:00:58,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1252961620, now seen corresponding path program 1 times [2020-10-28 15:00:58,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:00:58,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692279845] [2020-10-28 15:00:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:00:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:58,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:58,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:58,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:00:58,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:58,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-28 15:00:58,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:58,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:58,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:00:58,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:00:58,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:00:58,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 15:00:59,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:00:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:59,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:59,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:59,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:00:59,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:59,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 15:00:59,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:59,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:59,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:59,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:59,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:59,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:00:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:00:59,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692279845] [2020-10-28 15:00:59,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:00:59,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:00:59,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967944001] [2020-10-28 15:00:59,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:00:59,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:00:59,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:00:59,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:00:59,083 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 5 states. [2020-10-28 15:00:59,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:00:59,623 INFO L93 Difference]: Finished difference Result 93 states and 135 transitions. [2020-10-28 15:00:59,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:00:59,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 15:00:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:00:59,638 INFO L225 Difference]: With dead ends: 93 [2020-10-28 15:00:59,638 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:00:59,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:00:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:00:59,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 15:00:59,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 15:00:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2020-10-28 15:00:59,700 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 13 [2020-10-28 15:00:59,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:00:59,701 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2020-10-28 15:00:59,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:00:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2020-10-28 15:00:59,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:00:59,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:00:59,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:00:59,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:00:59,703 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:00:59,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:00:59,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1152700707, now seen corresponding path program 1 times [2020-10-28 15:00:59,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:00:59,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322357036] [2020-10-28 15:00:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:00:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:59,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:59,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:59,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 15:00:59,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:59,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-28 15:00:59,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:59,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:59,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:00:59,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:00:59,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:00:59,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:01:00,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:00,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:00,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:00,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:00,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:00,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:01:00,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:00,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:00,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:00,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:00,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:00,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:00,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322357036] [2020-10-28 15:01:00,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:00,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:01:00,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319232280] [2020-10-28 15:01:00,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:01:00,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:00,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:01:00,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:01:00,070 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand 5 states. [2020-10-28 15:01:00,268 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-28 15:01:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:00,704 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2020-10-28 15:01:00,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:01:00,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 15:01:00,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:00,711 INFO L225 Difference]: With dead ends: 88 [2020-10-28 15:01:00,711 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 15:01:00,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:01:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 15:01:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 54. [2020-10-28 15:01:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 15:01:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-10-28 15:01:00,725 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 13 [2020-10-28 15:01:00,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:00,726 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-28 15:01:00,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:01:00,726 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2020-10-28 15:01:00,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 15:01:00,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:00,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:00,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:01:00,728 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:00,728 INFO L82 PathProgramCache]: Analyzing trace with hash -187152699, now seen corresponding path program 1 times [2020-10-28 15:01:00,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:00,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595956784] [2020-10-28 15:01:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:00,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:00,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:00,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:01:00,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:00,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-28 15:01:00,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:00,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:01:00,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:00,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:01:00,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:00,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:00,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:00,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:00,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:00,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:00,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:01:00,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:00,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:00,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:00,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:00,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:00,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:00,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595956784] [2020-10-28 15:01:00,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:00,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:01:00,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378257855] [2020-10-28 15:01:00,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:01:00,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:00,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:01:00,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:01:00,965 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand 5 states. [2020-10-28 15:01:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:01,280 INFO L93 Difference]: Finished difference Result 87 states and 117 transitions. [2020-10-28 15:01:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:01:01,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-28 15:01:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:01,282 INFO L225 Difference]: With dead ends: 87 [2020-10-28 15:01:01,282 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 15:01:01,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:01:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 15:01:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2020-10-28 15:01:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 15:01:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2020-10-28 15:01:01,296 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 14 [2020-10-28 15:01:01,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:01,296 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2020-10-28 15:01:01,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:01:01,297 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2020-10-28 15:01:01,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:01:01,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:01,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:01,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:01:01,298 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash 533409449, now seen corresponding path program 1 times [2020-10-28 15:01:01,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:01,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537903002] [2020-10-28 15:01:01,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:01,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:01,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:01,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:01,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 15:01:01,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:01,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-28 15:01:01,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:01,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:01,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:01:01,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:01,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:01:01,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:01:01,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:01,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:01,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:01,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:01,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:01,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:01:01,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:01,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:01,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:01,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:01,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:01,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:01,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537903002] [2020-10-28 15:01:01,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:01,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:01:01,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307920705] [2020-10-28 15:01:01,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:01:01,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:01,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:01:01,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:01:01,728 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand 5 states. [2020-10-28 15:01:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:01,935 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-10-28 15:01:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:01:01,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-28 15:01:01,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:01,937 INFO L225 Difference]: With dead ends: 59 [2020-10-28 15:01:01,937 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 15:01:01,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:01:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 15:01:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-28 15:01:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 15:01:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2020-10-28 15:01:01,948 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 16 [2020-10-28 15:01:01,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:01,948 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2020-10-28 15:01:01,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:01:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2020-10-28 15:01:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:01:01,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:01,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:01,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:01:01,950 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:01,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:01,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1814873839, now seen corresponding path program 1 times [2020-10-28 15:01:01,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:01,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938092658] [2020-10-28 15:01:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:01,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:01,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:02,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:02,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:02,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 15:01:02,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:01:02,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-28 15:01:02,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:02,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:02,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:01:02,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:02,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:01:02,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:02,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:02,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:02,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:02,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:02,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:02,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:01:02,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:02,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:02,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:02,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:02,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938092658] [2020-10-28 15:01:02,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:02,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:01:02,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284313985] [2020-10-28 15:01:02,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:01:02,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:02,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:01:02,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:01:02,241 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand 5 states. [2020-10-28 15:01:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:02,446 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2020-10-28 15:01:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:01:02,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-28 15:01:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:02,447 INFO L225 Difference]: With dead ends: 58 [2020-10-28 15:01:02,448 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:01:02,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:01:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:01:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 15:01:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 15:01:02,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2020-10-28 15:01:02,459 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 16 [2020-10-28 15:01:02,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:02,459 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2020-10-28 15:01:02,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:01:02,460 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2020-10-28 15:01:02,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:01:02,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:02,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:02,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:01:02,461 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:02,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:02,462 INFO L82 PathProgramCache]: Analyzing trace with hash -644212752, now seen corresponding path program 1 times [2020-10-28 15:01:02,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:02,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971778258] [2020-10-28 15:01:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:02,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:02,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:02,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:02,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:02,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:01:02,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:01:02,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-28 15:01:02,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:02,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:01:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 15:01:02,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 15:01:02,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:02,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:02,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:02,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:02,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:02,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:02,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:01:02,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:02,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:02,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:02,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:02,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971778258] [2020-10-28 15:01:02,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:02,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:01:02,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037554485] [2020-10-28 15:01:02,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:01:02,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:02,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:01:02,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:01:02,835 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand 5 states. [2020-10-28 15:01:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:03,032 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-10-28 15:01:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:01:03,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 15:01:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:03,033 INFO L225 Difference]: With dead ends: 58 [2020-10-28 15:01:03,033 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 15:01:03,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:01:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 15:01:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-28 15:01:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 15:01:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2020-10-28 15:01:03,042 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 17 [2020-10-28 15:01:03,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:03,043 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2020-10-28 15:01:03,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:01:03,043 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2020-10-28 15:01:03,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:01:03,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:03,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:03,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:01:03,044 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:03,045 INFO L82 PathProgramCache]: Analyzing trace with hash -413143954, now seen corresponding path program 1 times [2020-10-28 15:01:03,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:03,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83646907] [2020-10-28 15:01:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:03,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:03,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:03,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:03,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:01:03,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:03,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-28 15:01:03,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:03,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:03,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:01:03,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:03,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:01:03,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:03,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:03,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:03,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:03,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:03,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:03,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:01:03,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:03,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:03,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:03,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:03,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:03,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:03,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83646907] [2020-10-28 15:01:03,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:03,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:01:03,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668644149] [2020-10-28 15:01:03,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:01:03,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:03,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:01:03,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:01:03,442 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 6 states. [2020-10-28 15:01:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:03,747 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2020-10-28 15:01:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:01:03,748 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-28 15:01:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:03,749 INFO L225 Difference]: With dead ends: 86 [2020-10-28 15:01:03,749 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 15:01:03,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:01:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 15:01:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-10-28 15:01:03,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 15:01:03,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2020-10-28 15:01:03,770 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 17 [2020-10-28 15:01:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:03,770 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2020-10-28 15:01:03,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:01:03,771 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2020-10-28 15:01:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:01:03,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:03,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:03,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:01:03,777 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:03,778 INFO L82 PathProgramCache]: Analyzing trace with hash -426473086, now seen corresponding path program 1 times [2020-10-28 15:01:03,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:03,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051212584] [2020-10-28 15:01:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:03,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:03,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:03,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:04,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:04,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:01:04,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:01:04,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-28 15:01:04,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:04,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:04,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:01:04,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 15:01:04,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 15:01:04,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:04,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:04,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:04,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:04,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:04,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:04,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:01:04,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:04,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:04,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:04,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:04,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:04,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:04,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051212584] [2020-10-28 15:01:04,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:04,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:01:04,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975307056] [2020-10-28 15:01:04,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:01:04,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:04,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:01:04,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:01:04,350 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand 5 states. [2020-10-28 15:01:04,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:04,511 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-10-28 15:01:04,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:01:04,512 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 15:01:04,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:04,513 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:01:04,513 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 15:01:04,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:01:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 15:01:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-28 15:01:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 15:01:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2020-10-28 15:01:04,524 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 17 [2020-10-28 15:01:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:04,525 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2020-10-28 15:01:04,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:01:04,525 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2020-10-28 15:01:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:01:04,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:04,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:04,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:01:04,529 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:04,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:04,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1945004872, now seen corresponding path program 1 times [2020-10-28 15:01:04,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:04,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653185017] [2020-10-28 15:01:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:04,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:04,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:04,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:04,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:01:04,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:04,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-28 15:01:04,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:04,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:04,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:01:04,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:04,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:01:04,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:04,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:04,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:04,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:04,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:04,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:04,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:01:04,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:04,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:04,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:04,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:04,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:04,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:04,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653185017] [2020-10-28 15:01:04,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:04,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:01:04,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083491243] [2020-10-28 15:01:04,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:01:04,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:04,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:01:04,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:01:04,824 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand 6 states. [2020-10-28 15:01:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:05,032 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2020-10-28 15:01:05,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:01:05,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 15:01:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:05,036 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:01:05,036 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 15:01:05,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:01:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 15:01:05,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-28 15:01:05,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 15:01:05,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2020-10-28 15:01:05,045 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 18 [2020-10-28 15:01:05,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:05,047 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-10-28 15:01:05,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:01:05,047 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2020-10-28 15:01:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:01:05,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:05,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:05,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:01:05,051 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:05,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1992718894, now seen corresponding path program 1 times [2020-10-28 15:01:05,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:05,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787049875] [2020-10-28 15:01:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:05,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:05,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:05,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:05,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:01:05,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:05,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 15:01:05,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:05,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:01:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:01:05,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:05,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:05,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:05,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:05,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:05,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:05,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:01:05,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:05,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:05,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:05,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:05,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:05,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:05,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787049875] [2020-10-28 15:01:05,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:05,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:01:05,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447837810] [2020-10-28 15:01:05,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:01:05,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:05,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:01:05,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:01:05,311 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand 6 states. [2020-10-28 15:01:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:05,489 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-10-28 15:01:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:01:05,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 15:01:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:05,491 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:01:05,491 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 15:01:05,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:01:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 15:01:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-28 15:01:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 15:01:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-10-28 15:01:05,498 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 18 [2020-10-28 15:01:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:05,499 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-10-28 15:01:05,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:01:05,499 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-10-28 15:01:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:01:05,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:05,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:05,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:01:05,500 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:05,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:05,501 INFO L82 PathProgramCache]: Analyzing trace with hash 77494928, now seen corresponding path program 1 times [2020-10-28 15:01:05,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:05,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552049029] [2020-10-28 15:01:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:05,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:05,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:05,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:05,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:01:05,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:05,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-28 15:01:05,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:05,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:05,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:01:05,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:05,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:01:05,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:05,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:05,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:05,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:05,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:05,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:05,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:01:05,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:05,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:05,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:05,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:05,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:05,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:05,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552049029] [2020-10-28 15:01:05,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:05,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:01:05,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011436250] [2020-10-28 15:01:05,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:01:05,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:05,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:01:05,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:01:05,767 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 6 states. [2020-10-28 15:01:06,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:06,066 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2020-10-28 15:01:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:01:06,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 15:01:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:06,068 INFO L225 Difference]: With dead ends: 76 [2020-10-28 15:01:06,068 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 15:01:06,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:01:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 15:01:06,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-28 15:01:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:01:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-28 15:01:06,078 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 18 [2020-10-28 15:01:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:06,078 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-28 15:01:06,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:01:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-28 15:01:06,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:01:06,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:06,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:06,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:01:06,080 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:06,080 INFO L82 PathProgramCache]: Analyzing trace with hash 207916293, now seen corresponding path program 1 times [2020-10-28 15:01:06,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:06,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467543362] [2020-10-28 15:01:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:06,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:06,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:06,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:06,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:01:06,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:06,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-28 15:01:06,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:06,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:06,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:01:06,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:06,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:01:06,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:06,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:06,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:06,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:06,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:06,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:06,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:01:06,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:06,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:06,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:06,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:06,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:06,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:06,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467543362] [2020-10-28 15:01:06,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:06,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:01:06,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122329231] [2020-10-28 15:01:06,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:01:06,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:06,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:01:06,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:01:06,365 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 6 states. [2020-10-28 15:01:06,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:06,574 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2020-10-28 15:01:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:01:06,575 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-28 15:01:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:06,576 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:01:06,576 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 15:01:06,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:01:06,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 15:01:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2020-10-28 15:01:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:01:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-10-28 15:01:06,585 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 19 [2020-10-28 15:01:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:06,586 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-10-28 15:01:06,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:01:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-10-28 15:01:06,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:01:06,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:06,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:06,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:01:06,587 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:06,588 INFO L82 PathProgramCache]: Analyzing trace with hash 165588862, now seen corresponding path program 1 times [2020-10-28 15:01:06,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:06,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60705193] [2020-10-28 15:01:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:06,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:06,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:06,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:06,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:01:06,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:06,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-28 15:01:06,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:06,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:01:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:01:06,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:06,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:06,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:06,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:06,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:06,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:06,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:01:06,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:06,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:06,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:06,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:06,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:06,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:06,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60705193] [2020-10-28 15:01:06,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:06,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:01:06,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342714110] [2020-10-28 15:01:06,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:01:06,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:06,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:01:06,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:01:06,967 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2020-10-28 15:01:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:07,205 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-10-28 15:01:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:01:07,206 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-28 15:01:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:07,206 INFO L225 Difference]: With dead ends: 58 [2020-10-28 15:01:07,206 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:01:07,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:01:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:01:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-10-28 15:01:07,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 15:01:07,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-28 15:01:07,214 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 19 [2020-10-28 15:01:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:07,214 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-28 15:01:07,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:01:07,214 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-28 15:01:07,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:01:07,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:07,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:07,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:01:07,215 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:07,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:07,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1644760434, now seen corresponding path program 1 times [2020-10-28 15:01:07,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:07,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831674723] [2020-10-28 15:01:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:07,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:07,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:07,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:07,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:01:07,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:07,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-28 15:01:07,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:07,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:01:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:07,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:01:07,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:07,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:07,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:07,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:07,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:07,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:07,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:01:07,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:07,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:07,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:07,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:07,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:07,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:07,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831674723] [2020-10-28 15:01:07,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:07,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:01:07,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880120444] [2020-10-28 15:01:07,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:01:07,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:07,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:01:07,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:01:07,498 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 6 states. [2020-10-28 15:01:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:07,704 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-28 15:01:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:01:07,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-28 15:01:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:07,705 INFO L225 Difference]: With dead ends: 45 [2020-10-28 15:01:07,705 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 15:01:07,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:01:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 15:01:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-28 15:01:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:01:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-28 15:01:07,711 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 19 [2020-10-28 15:01:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:07,712 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-28 15:01:07,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:01:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-28 15:01:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:01:07,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:07,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:07,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:01:07,713 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:07,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2086285341, now seen corresponding path program 1 times [2020-10-28 15:01:07,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:07,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58000012] [2020-10-28 15:01:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:07,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:07,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:07,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:07,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:01:07,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:07,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-28 15:01:07,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:07,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:01:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:07,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:01:07,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:08,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:08,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:08,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:08,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:08,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:08,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:01:08,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:08,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:08,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:08,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:08,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:08,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:08,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58000012] [2020-10-28 15:01:08,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:08,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:01:08,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051526965] [2020-10-28 15:01:08,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:01:08,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:08,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:01:08,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:01:08,047 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 6 states. [2020-10-28 15:01:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:08,226 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-10-28 15:01:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:01:08,227 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-28 15:01:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:08,228 INFO L225 Difference]: With dead ends: 42 [2020-10-28 15:01:08,228 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 15:01:08,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:01:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 15:01:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-28 15:01:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:01:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 15:01:08,233 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 19 [2020-10-28 15:01:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:08,234 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 15:01:08,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:01:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 15:01:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:01:08,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:08,234 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] [2020-10-28 15:01:08,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:01:08,235 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:08,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:08,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2144527184, now seen corresponding path program 1 times [2020-10-28 15:01:08,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:08,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352571801] [2020-10-28 15:01:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:08,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:08,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:08,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:08,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:01:08,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:08,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-28 15:01:08,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:08,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:08,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:01:08,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:08,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:01:08,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:08,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:08,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:08,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:08,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:08,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:08,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:01:08,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:08,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:08,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:08,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:08,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:08,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:08,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352571801] [2020-10-28 15:01:08,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:08,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 15:01:08,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589341895] [2020-10-28 15:01:08,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:01:08,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:08,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:01:08,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:01:08,600 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2020-10-28 15:01:08,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:08,874 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2020-10-28 15:01:08,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:01:08,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-28 15:01:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:08,876 INFO L225 Difference]: With dead ends: 73 [2020-10-28 15:01:08,876 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 15:01:08,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:01:08,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 15:01:08,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2020-10-28 15:01:08,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 15:01:08,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-28 15:01:08,883 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 20 [2020-10-28 15:01:08,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:08,883 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-28 15:01:08,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:01:08,883 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-28 15:01:08,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:01:08,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:08,884 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] [2020-10-28 15:01:08,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:01:08,884 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:08,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:08,885 INFO L82 PathProgramCache]: Analyzing trace with hash 216502178, now seen corresponding path program 1 times [2020-10-28 15:01:08,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:08,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513924306] [2020-10-28 15:01:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:08,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:08,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:08,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:08,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:09,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:09,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:01:09,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:01:09,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-28 15:01:09,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:09,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:09,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:01:09,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:09,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:01:09,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:01:09,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:09,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:09,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:09,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:09,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:09,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:01:09,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:09,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:09,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:09,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:09,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:09,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:09,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513924306] [2020-10-28 15:01:09,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:09,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:01:09,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405041877] [2020-10-28 15:01:09,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:01:09,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:09,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:01:09,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:01:09,824 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 5 states. [2020-10-28 15:01:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:09,962 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-10-28 15:01:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:01:09,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-28 15:01:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:09,963 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:01:09,963 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 15:01:09,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:01:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 15:01:09,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 15:01:09,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:01:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-28 15:01:09,971 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 21 [2020-10-28 15:01:09,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:09,971 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-28 15:01:09,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:01:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-28 15:01:09,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:01:09,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:09,972 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] [2020-10-28 15:01:09,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:01:09,972 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:09,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:09,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1878376405, now seen corresponding path program 1 times [2020-10-28 15:01:09,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:09,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195288258] [2020-10-28 15:01:09,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:09,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:10,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:10,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:10,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:10,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:10,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:01:10,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:01:10,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-28 15:01:10,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:10,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:10,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:01:10,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 15:01:10,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 15:01:10,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:10,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:10,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:10,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:10,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:10,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:10,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:01:10,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:10,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:10,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:10,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:10,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:10,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:10,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195288258] [2020-10-28 15:01:10,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:10,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:01:10,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958197273] [2020-10-28 15:01:10,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:01:10,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:10,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:01:10,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:01:10,690 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 5 states. [2020-10-28 15:01:10,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:10,828 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-28 15:01:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:01:10,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-28 15:01:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:10,829 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:01:10,829 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 15:01:10,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:01:10,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 15:01:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-28 15:01:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 15:01:10,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-28 15:01:10,835 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 22 [2020-10-28 15:01:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:10,835 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-28 15:01:10,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:01:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-28 15:01:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:01:10,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:10,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:10,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:01:10,836 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1984748226, now seen corresponding path program 1 times [2020-10-28 15:01:10,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:10,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963328474] [2020-10-28 15:01:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:10,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:10,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:10,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:11,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:11,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:01:11,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:01:11,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-28 15:01:11,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:11,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:01:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:01:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:01:11,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:11,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:11,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:11,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:11,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:11,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:11,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:01:11,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:11,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:11,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:11,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:11,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:11,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:01:11,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963328474] [2020-10-28 15:01:11,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:01:11,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 15:01:11,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32121444] [2020-10-28 15:01:11,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:01:11,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:11,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:01:11,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:01:11,341 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 9 states. [2020-10-28 15:01:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:11,586 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-28 15:01:11,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:01:11,586 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-28 15:01:11,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:11,587 INFO L225 Difference]: With dead ends: 52 [2020-10-28 15:01:11,587 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 15:01:11,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:01:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 15:01:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 15:01:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 15:01:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 15:01:11,589 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-10-28 15:01:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:11,589 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 15:01:11,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:01:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 15:01:11,589 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 15:01:11,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:01:11,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 15:01:12,094 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-28 15:01:12,095 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-28 15:01:12,095 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-28 15:01:12,095 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-28 15:01:12,095 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:01:12,095 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.offset| |old(#t~string5.offset)|) (= ~__tmp_383_0~0 |old(~__tmp_383_0~0)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |old(#valid)| |#valid|) (= ~__return_305~0 |old(~__return_305~0)|) (= |#t~string5.base| |old(#t~string5.base)|) (= ~__tmp_247_0~0 |old(~__tmp_247_0~0)|) (= |#t~string4.base| |old(#t~string4.base)|) (= ~__return_main~0 |old(~__return_main~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-10-28 15:01:12,095 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:01:12,096 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:01:12,096 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 15:01:12,096 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 15:01:12,096 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:01:12,096 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-10-28 15:01:12,096 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-28 15:01:12,096 INFO L274 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-10-28 15:01:12,096 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-10-28 15:01:12,096 INFO L270 CegarLoopResult]: At program point L225(line 225) the Hoare annotation is: false [2020-10-28 15:01:12,097 INFO L274 CegarLoopResult]: For program point L225-1(line 225) no Hoare annotation was computed. [2020-10-28 15:01:12,097 INFO L274 CegarLoopResult]: For program point L349(lines 349 358) no Hoare annotation was computed. [2020-10-28 15:01:12,097 INFO L270 CegarLoopResult]: At program point L250(lines 102 252) the Hoare annotation is: (and (< main_~main__t~0 main_~main__tagbuf_len~0) (not (= main_~__VERIFIER_assert__cond~0 0)) (<= 1 main_~main__t~0) (<= 1 main_~__VERIFIER_assert__cond~1)) [2020-10-28 15:01:12,097 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 15 375) no Hoare annotation was computed. [2020-10-28 15:01:12,097 INFO L270 CegarLoopResult]: At program point L85(line 85) the Hoare annotation is: false [2020-10-28 15:01:12,097 INFO L274 CegarLoopResult]: For program point L85-1(line 85) no Hoare annotation was computed. [2020-10-28 15:01:12,099 INFO L274 CegarLoopResult]: For program point L308(lines 308 316) no Hoare annotation was computed. [2020-10-28 15:01:12,100 INFO L270 CegarLoopResult]: At program point L143(line 143) the Hoare annotation is: false [2020-10-28 15:01:12,100 INFO L274 CegarLoopResult]: For program point L143-1(line 143) no Hoare annotation was computed. [2020-10-28 15:01:12,100 INFO L270 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: false [2020-10-28 15:01:12,100 INFO L274 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-10-28 15:01:12,100 INFO L274 CegarLoopResult]: For program point L102(lines 102 252) no Hoare annotation was computed. [2020-10-28 15:01:12,101 INFO L274 CegarLoopResult]: For program point L325(lines 325 362) no Hoare annotation was computed. [2020-10-28 15:01:12,102 INFO L270 CegarLoopResult]: At program point L127(line 127) the Hoare annotation is: false [2020-10-28 15:01:12,102 INFO L274 CegarLoopResult]: For program point L127-1(line 127) no Hoare annotation was computed. [2020-10-28 15:01:12,102 INFO L274 CegarLoopResult]: For program point L20(lines 20 374) no Hoare annotation was computed. [2020-10-28 15:01:12,102 INFO L270 CegarLoopResult]: At program point L177(line 177) the Hoare annotation is: false [2020-10-28 15:01:12,102 INFO L274 CegarLoopResult]: For program point L177-1(line 177) no Hoare annotation was computed. [2020-10-28 15:01:12,102 INFO L274 CegarLoopResult]: For program point L235(lines 235 243) no Hoare annotation was computed. [2020-10-28 15:01:12,102 INFO L270 CegarLoopResult]: At program point L351(line 351) the Hoare annotation is: false [2020-10-28 15:01:12,102 INFO L274 CegarLoopResult]: For program point L351-1(line 351) no Hoare annotation was computed. [2020-10-28 15:01:12,102 INFO L274 CegarLoopResult]: For program point L153(lines 153 161) no Hoare annotation was computed. [2020-10-28 15:01:12,102 INFO L274 CegarLoopResult]: For program point L54(lines 54 254) no Hoare annotation was computed. [2020-10-28 15:01:12,103 INFO L270 CegarLoopResult]: At program point L310(line 310) the Hoare annotation is: false [2020-10-28 15:01:12,103 INFO L274 CegarLoopResult]: For program point L277(lines 277 364) no Hoare annotation was computed. [2020-10-28 15:01:12,103 INFO L274 CegarLoopResult]: For program point L310-1(line 310) no Hoare annotation was computed. [2020-10-28 15:01:12,103 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 15 375) no Hoare annotation was computed. [2020-10-28 15:01:12,103 INFO L274 CegarLoopResult]: For program point L71(lines 71 95) no Hoare annotation was computed. [2020-10-28 15:01:12,103 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 15 375) the Hoare annotation is: (and (= |old(~__tmp_247_0~0)| ~__tmp_247_0~0) (= |old(~__return_305~0)| ~__return_305~0) (= |old(~__tmp_383_0~0)| ~__tmp_383_0~0)) [2020-10-28 15:01:12,103 INFO L274 CegarLoopResult]: For program point L187(lines 187 197) no Hoare annotation was computed. [2020-10-28 15:01:12,103 INFO L274 CegarLoopResult]: For program point L113(lines 113 204) no Hoare annotation was computed. [2020-10-28 15:01:12,103 INFO L270 CegarLoopResult]: At program point L237(line 237) the Hoare annotation is: false [2020-10-28 15:01:12,104 INFO L274 CegarLoopResult]: For program point L237-1(line 237) no Hoare annotation was computed. [2020-10-28 15:01:12,104 INFO L270 CegarLoopResult]: At program point L328(lines 32 368) the Hoare annotation is: (and (<= (+ main_~main__t~0 1) main_~main__tagbuf_len~0) (<= 0 main_~main__t~0)) [2020-10-28 15:01:12,104 INFO L270 CegarLoopResult]: At program point L196(lines 60 254) the Hoare annotation is: (and (not (= main_~__VERIFIER_assert__cond~0 0)) (<= 1 main_~main__t~0) (< main_~main__t~0 (+ main_~main__tagbuf_len~0 1)) (<= 1 main_~__VERIFIER_assert__cond~1)) [2020-10-28 15:01:12,105 INFO L270 CegarLoopResult]: At program point L155(line 155) the Hoare annotation is: false [2020-10-28 15:01:12,105 INFO L274 CegarLoopResult]: For program point L155-1(line 155) no Hoare annotation was computed. [2020-10-28 15:01:12,105 INFO L270 CegarLoopResult]: At program point L56(line 56) the Hoare annotation is: false [2020-10-28 15:01:12,105 INFO L274 CegarLoopResult]: For program point L56-1(line 56) no Hoare annotation was computed. [2020-10-28 15:01:12,105 INFO L270 CegarLoopResult]: At program point L279(line 279) the Hoare annotation is: false [2020-10-28 15:01:12,105 INFO L274 CegarLoopResult]: For program point L279-1(line 279) no Hoare annotation was computed. [2020-10-28 15:01:12,105 INFO L274 CegarLoopResult]: For program point L337(lines 337 360) no Hoare annotation was computed. [2020-10-28 15:01:12,105 INFO L274 CegarLoopResult]: For program point L106(lines 106 210) no Hoare annotation was computed. [2020-10-28 15:01:12,105 INFO L270 CegarLoopResult]: At program point L73(line 73) the Hoare annotation is: false [2020-10-28 15:01:12,105 INFO L274 CegarLoopResult]: For program point L73-1(line 73) no Hoare annotation was computed. [2020-10-28 15:01:12,106 INFO L274 CegarLoopResult]: For program point L296(lines 296 318) no Hoare annotation was computed. [2020-10-28 15:01:12,106 INFO L274 CegarLoopResult]: For program point L32(lines 32 368) no Hoare annotation was computed. [2020-10-28 15:01:12,106 INFO L270 CegarLoopResult]: At program point L189(line 189) the Hoare annotation is: false [2020-10-28 15:01:12,106 INFO L274 CegarLoopResult]: For program point L189-1(line 189) no Hoare annotation was computed. [2020-10-28 15:01:12,106 INFO L274 CegarLoopResult]: For program point L24(lines 24 369) no Hoare annotation was computed. [2020-10-28 15:01:12,106 INFO L270 CegarLoopResult]: At program point L115(line 115) the Hoare annotation is: false [2020-10-28 15:01:12,106 INFO L274 CegarLoopResult]: For program point L115-1(line 115) no Hoare annotation was computed. [2020-10-28 15:01:12,106 INFO L274 CegarLoopResult]: For program point L289(lines 289 363) no Hoare annotation was computed. [2020-10-28 15:01:12,106 INFO L274 CegarLoopResult]: For program point L223(lines 223 245) no Hoare annotation was computed. [2020-10-28 15:01:12,106 INFO L274 CegarLoopResult]: For program point L83(lines 83 93) no Hoare annotation was computed. [2020-10-28 15:01:12,107 INFO L270 CegarLoopResult]: At program point L339(line 339) the Hoare annotation is: false [2020-10-28 15:01:12,107 INFO L274 CegarLoopResult]: For program point L339-1(line 339) no Hoare annotation was computed. [2020-10-28 15:01:12,107 INFO L274 CegarLoopResult]: For program point L141(lines 141 163) no Hoare annotation was computed. [2020-10-28 15:01:12,107 INFO L274 CegarLoopResult]: For program point L42(lines 42 256) no Hoare annotation was computed. [2020-10-28 15:01:12,107 INFO L270 CegarLoopResult]: At program point L298(line 298) the Hoare annotation is: false [2020-10-28 15:01:12,107 INFO L274 CegarLoopResult]: For program point L298-1(line 298) no Hoare annotation was computed. [2020-10-28 15:01:12,107 INFO L274 CegarLoopResult]: For program point L125(lines 125 202) no Hoare annotation was computed. [2020-10-28 15:01:12,107 INFO L270 CegarLoopResult]: At program point L315(lines 32 368) the Hoare annotation is: (<= 0 main_~main__t~0) [2020-10-28 15:01:12,107 INFO L274 CegarLoopResult]: For program point L216(lines 216 251) no Hoare annotation was computed. [2020-10-28 15:01:12,107 INFO L274 CegarLoopResult]: For program point L175(lines 175 199) no Hoare annotation was computed. [2020-10-28 15:01:12,107 INFO L274 CegarLoopResult]: For program point L266(lines 266 366) no Hoare annotation was computed. [2020-10-28 15:01:12,108 INFO L274 CegarLoopResult]: For program point L134(lines 134 201) no Hoare annotation was computed. [2020-10-28 15:01:12,108 INFO L270 CegarLoopResult]: At program point L357(lines 283 364) the Hoare annotation is: (and (< main_~main__t~0 main_~main__tagbuf_len~0) (not (= main_~__VERIFIER_assert__cond~13 0)) (<= 0 main_~main__t~0)) [2020-10-28 15:01:12,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 03:01:12 BoogieIcfgContainer [2020-10-28 15:01:12,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 15:01:12,146 INFO L168 Benchmark]: Toolchain (without parser) took 15116.87 ms. Allocated memory was 154.1 MB in the beginning and 323.0 MB in the end (delta: 168.8 MB). Free memory was 129.0 MB in the beginning and 221.6 MB in the end (delta: -92.6 MB). Peak memory consumption was 76.4 MB. Max. memory is 8.0 GB. [2020-10-28 15:01:12,152 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory was 126.6 MB in the beginning and 126.5 MB in the end (delta: 112.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:01:12,152 INFO L168 Benchmark]: CACSL2BoogieTranslator took 418.44 ms. Allocated memory is still 154.1 MB. Free memory was 128.4 MB in the beginning and 116.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-28 15:01:12,155 INFO L168 Benchmark]: Boogie Preprocessor took 48.30 ms. Allocated memory is still 154.1 MB. Free memory was 116.5 MB in the beginning and 114.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 15:01:12,156 INFO L168 Benchmark]: RCFGBuilder took 746.72 ms. Allocated memory is still 154.1 MB. Free memory was 114.8 MB in the beginning and 122.5 MB in the end (delta: -7.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-28 15:01:12,156 INFO L168 Benchmark]: TraceAbstraction took 13887.28 ms. Allocated memory was 154.1 MB in the beginning and 323.0 MB in the end (delta: 168.8 MB). Free memory was 121.9 MB in the beginning and 221.6 MB in the end (delta: -99.7 MB). Peak memory consumption was 70.2 MB. Max. memory is 8.0 GB. [2020-10-28 15:01:12,164 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory was 126.6 MB in the beginning and 126.5 MB in the end (delta: 112.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 418.44 ms. Allocated memory is still 154.1 MB. Free memory was 128.4 MB in the beginning and 116.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.30 ms. Allocated memory is still 154.1 MB. Free memory was 116.5 MB in the beginning and 114.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 746.72 ms. Allocated memory is still 154.1 MB. Free memory was 114.8 MB in the beginning and 122.5 MB in the end (delta: -7.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13887.28 ms. Allocated memory was 154.1 MB in the beginning and 323.0 MB in the end (delta: 168.8 MB). Free memory was 121.9 MB in the beginning and 221.6 MB in the end (delta: -99.7 MB). Peak memory consumption was 70.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 0 <= main__t - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: main__t + 1 <= main__tagbuf_len && 0 <= main__t - InvariantResult [Line: 60]: Loop Invariant Derived loop invariant: ((!(__VERIFIER_assert__cond == 0) && 1 <= main__t) && main__t < main__tagbuf_len + 1) && 1 <= __VERIFIER_assert__cond - InvariantResult [Line: 102]: Loop Invariant Derived loop invariant: ((main__t < main__tagbuf_len && !(__VERIFIER_assert__cond == 0)) && 1 <= main__t) && 1 <= __VERIFIER_assert__cond - InvariantResult [Line: 283]: Loop Invariant Derived loop invariant: (main__t < main__tagbuf_len && !(__VERIFIER_assert__cond == 0)) && 0 <= main__t - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.2s, OverallIterations: 19, TraceHistogramMax: 1, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 845 SDtfs, 1101 SDslu, 1052 SDs, 0 SdLazy, 2043 SolverSat, 296 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 192 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 27 LocationsWithAnnotation, 45 PreInvPairs, 52 NumberOfFragments, 126 HoareAnnotationTreeSize, 45 FomulaSimplifications, 101853 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 27 FomulaSimplificationsInter, 2609 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 339 NumberOfCodeBlocks, 339 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 320 ConstructedInterpolants, 0 QuantifiedInterpolants, 26543 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...