/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/array-fpi/s1lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:16:39,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:16:39,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:16:39,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:16:39,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:16:39,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:16:39,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:16:39,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:16:39,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:16:39,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:16:39,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:16:39,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:16:39,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:16:39,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:16:39,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:16:39,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:16:39,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:16:39,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:16:39,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:16:39,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:16:39,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:16:39,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:16:39,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:16:39,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:16:39,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:16:39,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:16:39,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:16:39,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:16:39,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:16:39,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:16:39,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:16:39,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:16:39,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:16:39,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:16:39,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:16:39,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:16:39,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:16:39,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:16:39,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:16:39,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:16:39,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:16:39,407 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 09:16:39,440 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:16:39,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:16:39,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:16:39,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:16:39,442 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:16:39,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:16:39,443 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:16:39,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:16:39,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:16:39,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:16:39,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:16:39,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:16:39,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:16:39,444 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:16:39,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:16:39,445 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:16:39,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:16:39,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:16:39,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:16:39,446 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:16:39,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:16:39,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:16:39,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:16:39,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:16:39,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:16:39,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:16:39,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:16:39,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:16:39,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:16:39,448 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:16:39,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:16:39,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:16:39,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:16:39,884 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:16:39,885 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:16:39,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1lif.c [2020-10-28 09:16:39,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd34a4e19/4383272b0f29452d925e8ebf45a8282f/FLAG5c5fba3e8 [2020-10-28 09:16:40,658 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:16:40,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s1lif.c [2020-10-28 09:16:40,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd34a4e19/4383272b0f29452d925e8ebf45a8282f/FLAG5c5fba3e8 [2020-10-28 09:16:41,028 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bd34a4e19/4383272b0f29452d925e8ebf45a8282f [2020-10-28 09:16:41,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:16:41,042 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:16:41,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:16:41,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:16:41,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:16:41,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:16:41" (1/1) ... [2020-10-28 09:16:41,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63787569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:41, skipping insertion in model container [2020-10-28 09:16:41,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:16:41" (1/1) ... [2020-10-28 09:16:41,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:16:41,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:16:41,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:16:41,334 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:16:41,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:16:41,382 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:16:41,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:41 WrapperNode [2020-10-28 09:16:41,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:16:41,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:16:41,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:16:41,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:16:41,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:41" (1/1) ... [2020-10-28 09:16:41,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:41" (1/1) ... [2020-10-28 09:16:41,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:41" (1/1) ... [2020-10-28 09:16:41,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:41" (1/1) ... [2020-10-28 09:16:41,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:41" (1/1) ... [2020-10-28 09:16:41,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:41" (1/1) ... [2020-10-28 09:16:41,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:41" (1/1) ... [2020-10-28 09:16:41,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:16:41,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:16:41,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:16:41,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:16:41,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:41" (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 09:16:41,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:16:41,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:16:41,544 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:16:41,545 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:16:41,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:16:41,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:16:41,545 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:16:41,546 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:16:41,546 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:16:41,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:16:41,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:16:41,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:16:41,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:16:41,548 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:16:41,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:16:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:16:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:16:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:16:41,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:16:41,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:16:41,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:16:41,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:16:42,052 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:16:42,052 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 09:16:42,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:16:42 BoogieIcfgContainer [2020-10-28 09:16:42,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:16:42,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:16:42,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:16:42,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:16:42,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:16:41" (1/3) ... [2020-10-28 09:16:42,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523d7cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:16:42, skipping insertion in model container [2020-10-28 09:16:42,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:41" (2/3) ... [2020-10-28 09:16:42,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523d7cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:16:42, skipping insertion in model container [2020-10-28 09:16:42,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:16:42" (3/3) ... [2020-10-28 09:16:42,065 INFO L111 eAbstractionObserver]: Analyzing ICFG s1lif.c [2020-10-28 09:16:42,079 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:16:42,085 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:16:42,099 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:16:42,131 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:16:42,132 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:16:42,132 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:16:42,132 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:16:42,132 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:16:42,132 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:16:42,133 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:16:42,133 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:16:42,158 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-28 09:16:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:16:42,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:42,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:42,170 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:42,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:42,184 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-28 09:16:42,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:42,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058499573] [2020-10-28 09:16:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:42,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:42,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:42,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:42,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:43,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:43,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 09:16:43,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:16:43,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 947 [2020-10-28 09:16:43,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:43,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:43,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:43,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:16:43,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:43,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:16:43,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:43,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:43,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:43,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:43,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:43,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:16:43,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:43,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:43,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:43,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:43,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:43,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:43,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:43,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:43,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:43,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:43,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:43,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:16:43,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:43,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:43,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:43,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 09:16:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:43,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:16:43,473 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 09:16:43,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058499573] [2020-10-28 09:16:43,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:16:43,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:16:43,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821893535] [2020-10-28 09:16:43,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:16:43,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:43,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:16:43,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:16:43,508 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-28 09:16:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:43,672 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-28 09:16:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:16:43,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-28 09:16:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:43,690 INFO L225 Difference]: With dead ends: 65 [2020-10-28 09:16:43,690 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:16:43,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:16:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:16:43,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 09:16:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 09:16:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 09:16:43,760 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2020-10-28 09:16:43,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:43,761 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 09:16:43,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:16:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 09:16:43,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:16:43,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:43,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:43,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:16:43,765 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:43,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:43,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1793608214, now seen corresponding path program 1 times [2020-10-28 09:16:43,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:43,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896034194] [2020-10-28 09:16:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:43,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:43,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:43,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:44,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:44,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 09:16:44,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:16:44,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-28 09:16:44,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:44,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:16:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:16:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:16:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:44,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:44,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:44,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:44,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:44,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:44,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:16:44,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:44,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:44,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:44,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:44,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:44,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:44,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:44,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:44,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:44,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:44,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:44,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:16:44,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:44,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:44,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:16:44,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:44,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:16:44,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:44,515 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 09:16:44,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896034194] [2020-10-28 09:16:44,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:16:44,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:16:44,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423548393] [2020-10-28 09:16:44,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:16:44,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:44,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:16:44,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:16:44,520 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-28 09:16:44,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:44,712 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-28 09:16:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:16:44,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-28 09:16:44,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:44,714 INFO L225 Difference]: With dead ends: 46 [2020-10-28 09:16:44,714 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 09:16:44,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 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 09:16:44,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 09:16:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 09:16:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 09:16:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-28 09:16:44,726 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-28 09:16:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:44,726 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-28 09:16:44,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:16:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-28 09:16:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:16:44,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:44,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:44,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:16:44,728 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:44,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-28 09:16:44,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:44,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476299261] [2020-10-28 09:16:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:44,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:44,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:45,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:45,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:45,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:45,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:46,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:46,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:48,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:48,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:16:48,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:16:48,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3261 [2020-10-28 09:16:48,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:48,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:48,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:16:48,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:48,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:16:48,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:48,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:48,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:48,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:48,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:48,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:48,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:48,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:48,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:48,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:48,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:48,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:48,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:48,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:48,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:48,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:48,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:48,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:48,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:48,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:48,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:48,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:48,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:16:48,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476299261] [2020-10-28 09:16:48,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:48,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:16:48,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868598379] [2020-10-28 09:16:48,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:16:48,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:48,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:16:48,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:16:48,678 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 14 states. [2020-10-28 09:16:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:49,345 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-10-28 09:16:49,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:16:49,346 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-28 09:16:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:49,348 INFO L225 Difference]: With dead ends: 49 [2020-10-28 09:16:49,349 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 09:16:49,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:16:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 09:16:49,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-10-28 09:16:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:16:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-28 09:16:49,361 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 31 [2020-10-28 09:16:49,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:49,361 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-28 09:16:49,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:16:49,362 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-28 09:16:49,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:16:49,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:49,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:49,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:16:49,365 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:49,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:49,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-28 09:16:49,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:49,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754089594] [2020-10-28 09:16:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:49,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:49,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:49,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:50,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:50,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:50,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:16:50,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:16:50,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1214 [2020-10-28 09:16:50,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:50,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:16:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:16:50,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:16:50,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:50,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:50,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:50,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:50,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:50,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:50,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:50,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:50,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:50,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:50,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:50,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:50,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:50,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:50,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:50,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:50,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:50,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:50,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:50,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:50,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:50,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:50,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:50,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:16:50,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754089594] [2020-10-28 09:16:50,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:50,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:16:50,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735327388] [2020-10-28 09:16:50,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:16:50,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:50,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:16:50,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:16:50,774 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-10-28 09:16:51,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:51,127 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-28 09:16:51,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:16:51,129 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-28 09:16:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:51,130 INFO L225 Difference]: With dead ends: 52 [2020-10-28 09:16:51,130 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 09:16:51,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:16:51,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 09:16:51,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 09:16:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 09:16:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-28 09:16:51,140 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 31 [2020-10-28 09:16:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:51,140 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-28 09:16:51,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:16:51,141 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-28 09:16:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:16:51,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:51,142 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:51,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:16:51,143 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:51,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:51,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-28 09:16:51,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:51,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780199039] [2020-10-28 09:16:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:51,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:51,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:51,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:51,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 09:16:51,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:16:51,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 663 [2020-10-28 09:16:51,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:51,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:51,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:16:51,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:51,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:16:51,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:51,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:51,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:51,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:51,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:51,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:51,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:16:51,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:51,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:51,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:51,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:51,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:51,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:51,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:51,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:51,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:51,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:51,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:51,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:51,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:51,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:51,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:51,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:51,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:51,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:16:51,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780199039] [2020-10-28 09:16:51,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:51,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:16:51,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399283961] [2020-10-28 09:16:51,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:16:51,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:51,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:16:51,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:16:51,950 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-10-28 09:16:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:52,224 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-10-28 09:16:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:16:52,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-28 09:16:52,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:52,226 INFO L225 Difference]: With dead ends: 85 [2020-10-28 09:16:52,227 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:16:52,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:16:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:16:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2020-10-28 09:16:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 09:16:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-28 09:16:52,236 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 33 [2020-10-28 09:16:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:52,236 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-28 09:16:52,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:16:52,236 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-28 09:16:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:16:52,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:52,238 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:52,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:16:52,238 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:52,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:52,239 INFO L82 PathProgramCache]: Analyzing trace with hash 820807280, now seen corresponding path program 3 times [2020-10-28 09:16:52,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:52,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79533321] [2020-10-28 09:16:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:52,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:52,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:52,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:52,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:52,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:53,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:53,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:53,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:53,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:56,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:56,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 09:16:56,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:16:56,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3959 [2020-10-28 09:16:56,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:56,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:56,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:16:56,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:16:56,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:16:56,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:56,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:16:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:56,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:56,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:56,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:16:56,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:56,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:16:56,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:56,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:56,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:56,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:56,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:56,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:16:56,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:16:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:56,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:56,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:16:56,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:16:56,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:16:56,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:16:56,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:16:56,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:16:56,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:16:56,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:16:56,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:16:56,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:16:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:16:56,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79533321] [2020-10-28 09:16:56,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:16:56,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:16:56,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695745276] [2020-10-28 09:16:56,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:16:56,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:16:56,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:16:56,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:16:56,323 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-10-28 09:16:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:16:56,610 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-28 09:16:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:16:56,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-28 09:16:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:16:56,612 INFO L225 Difference]: With dead ends: 51 [2020-10-28 09:16:56,612 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 09:16:56,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:16:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 09:16:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-28 09:16:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 09:16:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-28 09:16:56,620 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2020-10-28 09:16:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:16:56,621 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-28 09:16:56,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:16:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-28 09:16:56,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:16:56,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:16:56,622 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:16:56,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:16:56,623 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:16:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:16:56,624 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 4 times [2020-10-28 09:16:56,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:16:56,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191684329] [2020-10-28 09:16:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:16:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:16:56,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:56,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:57,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:57,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:58,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:58,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:58,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:59,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:16:59,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:00,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:00,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:00,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:01,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:01,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:17:01,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 09:17:01,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5124 [2020-10-28 09:17:01,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:01,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:01,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:17:01,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:01,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:17:01,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:17:02,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:02,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:02,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:02,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:02,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:02,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:17:02,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:02,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:02,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:02,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:02,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:02,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:02,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:02,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:02,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:02,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:02,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:02,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:02,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:02,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:02,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:02,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:02,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:02,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:17:02,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191684329] [2020-10-28 09:17:02,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:02,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:17:02,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69732823] [2020-10-28 09:17:02,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:17:02,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:02,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:17:02,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:17:02,922 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 19 states. [2020-10-28 09:17:03,594 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2020-10-28 09:17:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:04,102 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-28 09:17:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:17:04,107 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-10-28 09:17:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:04,109 INFO L225 Difference]: With dead ends: 65 [2020-10-28 09:17:04,109 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 09:17:04,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:17:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 09:17:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2020-10-28 09:17:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:17:04,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-28 09:17:04,128 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 38 [2020-10-28 09:17:04,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:04,128 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-28 09:17:04,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:17:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-28 09:17:04,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:17:04,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:04,131 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:04,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:17:04,132 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:04,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:04,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 1 times [2020-10-28 09:17:04,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:04,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962250293] [2020-10-28 09:17:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:04,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:04,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:05,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:06,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:06,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:07,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:07,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:07,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:17:07,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:17:07,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3644 [2020-10-28 09:17:07,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:07,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:07,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:17:07,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:17:07,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:17:07,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:08,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:08,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:08,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:08,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:08,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:08,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:17:08,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:08,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:08,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:08,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:08,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:08,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:08,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:08,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:08,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:08,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:08,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:08,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:08,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:08,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:08,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:08,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:08,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:08,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:17:08,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962250293] [2020-10-28 09:17:08,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:08,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:17:08,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544361126] [2020-10-28 09:17:08,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:17:08,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:08,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:17:08,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:17:08,112 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 13 states. [2020-10-28 09:17:08,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:08,910 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-10-28 09:17:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:17:08,911 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-28 09:17:08,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:08,913 INFO L225 Difference]: With dead ends: 76 [2020-10-28 09:17:08,913 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 09:17:08,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:17:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 09:17:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2020-10-28 09:17:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 09:17:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-28 09:17:08,924 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 38 [2020-10-28 09:17:08,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:08,924 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-28 09:17:08,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:17:08,924 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-28 09:17:08,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:17:08,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:08,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:08,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:17:08,926 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:08,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 2 times [2020-10-28 09:17:08,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:08,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503900946] [2020-10-28 09:17:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:08,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:08,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:09,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:09,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:09,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:10,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:12,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:12,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:17:12,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:17:12,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3061 [2020-10-28 09:17:12,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:12,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:12,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:17:12,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:12,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:17:12,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:12,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:12,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:12,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:12,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:12,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:12,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 09:17:12,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:12,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:12,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:12,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:12,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:12,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:12,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:12,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:12,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:12,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:12,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:12,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:12,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:12,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:12,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:12,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:12,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:12,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 09:17:12,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503900946] [2020-10-28 09:17:12,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:12,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:17:12,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783318798] [2020-10-28 09:17:12,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:17:12,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:12,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:17:12,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:17:12,171 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 7 states. [2020-10-28 09:17:12,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:12,318 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-10-28 09:17:12,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:17:12,319 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-28 09:17:12,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:12,320 INFO L225 Difference]: With dead ends: 76 [2020-10-28 09:17:12,320 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 09:17:12,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:17:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 09:17:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 09:17:12,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:17:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-28 09:17:12,338 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 38 [2020-10-28 09:17:12,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:12,339 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-28 09:17:12,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:17:12,339 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-28 09:17:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 09:17:12,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:12,340 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:12,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:17:12,340 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:12,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:12,341 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 5 times [2020-10-28 09:17:12,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:12,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533584023] [2020-10-28 09:17:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:12,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:12,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:13,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:13,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 09:17:13,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:17:13,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-28 09:17:13,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:13,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:13,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:17:13,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:13,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:17:13,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:13,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:13,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:13,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:13,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:13,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:13,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:17:13,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:13,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:13,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:13,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:13,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:13,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:13,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:13,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:13,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:13,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:13,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:13,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:13,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:13,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:13,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:13,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:17:13,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533584023] [2020-10-28 09:17:13,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:13,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:17:13,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774961148] [2020-10-28 09:17:13,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:17:13,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:17:13,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:17:13,358 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 10 states. [2020-10-28 09:17:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:13,671 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2020-10-28 09:17:13,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:17:13,671 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-28 09:17:13,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:13,673 INFO L225 Difference]: With dead ends: 108 [2020-10-28 09:17:13,673 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:17:13,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:17:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:17:13,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-28 09:17:13,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 09:17:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-28 09:17:13,684 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 40 [2020-10-28 09:17:13,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:13,685 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-28 09:17:13,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:17:13,685 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-28 09:17:13,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 09:17:13,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:13,686 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:13,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:17:13,686 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:13,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:13,686 INFO L82 PathProgramCache]: Analyzing trace with hash 451576945, now seen corresponding path program 6 times [2020-10-28 09:17:13,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:13,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011380704] [2020-10-28 09:17:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:13,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:13,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:13,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:13,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:13,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:13,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:14,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:14,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:14,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:14,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:14,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:14,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:15,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:15,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:15,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:15,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:16,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:17,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:18,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:18,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:18,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:18,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:18,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:18,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 09:17:18,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-28 09:17:18,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:17:18,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:18,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:18,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:17:18,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:18,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:17:18,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:18,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:18,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:18,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:18,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:18,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:18,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:17:18,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:18,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:18,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:18,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:18,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:18,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:18,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:18,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:18,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:18,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:18,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:18,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:18,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:18,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:18,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:18,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:18,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:18,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:17:18,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011380704] [2020-10-28 09:17:18,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:18,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:17:18,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472774518] [2020-10-28 09:17:18,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:17:18,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:18,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:17:18,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:17:18,841 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 10 states. [2020-10-28 09:17:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:19,226 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-28 09:17:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:17:19,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-28 09:17:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:19,228 INFO L225 Difference]: With dead ends: 64 [2020-10-28 09:17:19,228 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:17:19,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:17:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:17:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-10-28 09:17:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 09:17:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-28 09:17:19,250 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 43 [2020-10-28 09:17:19,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:19,250 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-28 09:17:19,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:17:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-28 09:17:19,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:17:19,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:19,251 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:19,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:17:19,252 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:19,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:19,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 7 times [2020-10-28 09:17:19,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:19,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986629977] [2020-10-28 09:17:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:19,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:19,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:19,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:20,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:20,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:20,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:21,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:21,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:21,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:22,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:22,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:22,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:23,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:23,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:23,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:23,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:24,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:24,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:17:24,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 09:17:24,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:17:24,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:24,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:24,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:17:24,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:24,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:17:24,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:26,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:26,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:26,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:26,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:26,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:26,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:17:26,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:26,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:26,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:26,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:26,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:26,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:26,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:26,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:26,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:26,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:26,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:26,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:26,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:26,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:26,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:26,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:26,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:26,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:17:26,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986629977] [2020-10-28 09:17:26,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:26,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:17:26,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658317795] [2020-10-28 09:17:26,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:17:26,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:26,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:17:26,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:17:26,372 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 27 states. [2020-10-28 09:17:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:28,571 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-10-28 09:17:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:17:28,572 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-10-28 09:17:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:28,573 INFO L225 Difference]: With dead ends: 83 [2020-10-28 09:17:28,573 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 09:17:28,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=185, Invalid=1707, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 09:17:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 09:17:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-10-28 09:17:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 09:17:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-28 09:17:28,594 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 45 [2020-10-28 09:17:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:28,594 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-28 09:17:28,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:17:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-28 09:17:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:17:28,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:28,595 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:28,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:17:28,595 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:28,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:28,596 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 3 times [2020-10-28 09:17:28,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:28,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064571117] [2020-10-28 09:17:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:28,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:28,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:28,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:28,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:29,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:29,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:30,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:30,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:30,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:32,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:32,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:32,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:33,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:33,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:17:33,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:17:33,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:17:33,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:33,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:33,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:17:33,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:33,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:17:33,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:34,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:34,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:34,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:34,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:34,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:34,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:17:34,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:34,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:34,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:34,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:34,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:34,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:34,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:34,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:34,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:34,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:34,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:34,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:34,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:34,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:34,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:34,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:34,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:34,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:17:34,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064571117] [2020-10-28 09:17:34,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:34,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:17:34,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592838108] [2020-10-28 09:17:34,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:17:34,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:34,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:17:34,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:17:34,034 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 17 states. [2020-10-28 09:17:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:34,933 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2020-10-28 09:17:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:17:34,933 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-28 09:17:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:34,935 INFO L225 Difference]: With dead ends: 94 [2020-10-28 09:17:34,935 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 09:17:34,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:17:34,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 09:17:34,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2020-10-28 09:17:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 09:17:34,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-28 09:17:34,949 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 45 [2020-10-28 09:17:34,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:34,950 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-28 09:17:34,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:17:34,950 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-28 09:17:34,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:17:34,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:34,951 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:34,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:17:34,951 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:34,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:34,952 INFO L82 PathProgramCache]: Analyzing trace with hash 550626477, now seen corresponding path program 4 times [2020-10-28 09:17:34,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:34,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457521678] [2020-10-28 09:17:34,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:34,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:35,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:35,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:35,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:35,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:35,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:35,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:36,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:38,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:38,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:38,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:39,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:39,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:39,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:39,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:17:39,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:17:39,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:17:39,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:39,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:39,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:17:39,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:39,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:17:39,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:40,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:40,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:40,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:40,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:40,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:40,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:40,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:40,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:40,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:40,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:40,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:40,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:40,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:40,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:40,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:40,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:40,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:40,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:40,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:40,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:40,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:40,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:17:40,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457521678] [2020-10-28 09:17:40,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:40,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:17:40,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922583611] [2020-10-28 09:17:40,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:17:40,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:40,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:17:40,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:17:40,401 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 16 states. [2020-10-28 09:17:40,811 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-10-28 09:17:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:41,247 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-10-28 09:17:41,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:17:41,248 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-28 09:17:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:41,249 INFO L225 Difference]: With dead ends: 95 [2020-10-28 09:17:41,249 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 09:17:41,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:17:41,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 09:17:41,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-10-28 09:17:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 09:17:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-28 09:17:41,264 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 45 [2020-10-28 09:17:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:41,264 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-28 09:17:41,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:17:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-28 09:17:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 09:17:41,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:41,265 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:41,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:17:41,266 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:41,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:41,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1846739949, now seen corresponding path program 8 times [2020-10-28 09:17:41,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:41,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296485818] [2020-10-28 09:17:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:41,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:41,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:42,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:42,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 09:17:42,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:17:42,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1390 [2020-10-28 09:17:42,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:42,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:42,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:17:42,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:42,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:17:42,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:42,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:42,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:42,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:42,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:42,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:42,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:17:42,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:42,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:42,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:42,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:42,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:42,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:42,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:42,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:42,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:42,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:42,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:42,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:42,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:42,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:42,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:42,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:17:42,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296485818] [2020-10-28 09:17:42,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:42,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:17:42,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348897595] [2020-10-28 09:17:42,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:17:42,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:42,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:17:42,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:17:42,805 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 12 states. [2020-10-28 09:17:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:43,240 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2020-10-28 09:17:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:17:43,241 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-28 09:17:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:43,242 INFO L225 Difference]: With dead ends: 159 [2020-10-28 09:17:43,242 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 09:17:43,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:17:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 09:17:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-28 09:17:43,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:17:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-10-28 09:17:43,257 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 47 [2020-10-28 09:17:43,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:43,257 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-10-28 09:17:43,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:17:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-10-28 09:17:43,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 09:17:43,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:43,258 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:43,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:17:43,258 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:43,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:43,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1003714415, now seen corresponding path program 9 times [2020-10-28 09:17:43,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:43,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300660065] [2020-10-28 09:17:43,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:43,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:43,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:43,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:44,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:44,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:44,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:44,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:45,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:45,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:45,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:45,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:46,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:46,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:47,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:47,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:48,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:48,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:48,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 09:17:48,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 09:17:48,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:17:48,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:48,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:17:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:48,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:17:48,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:48,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:48,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:48,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:48,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:48,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:48,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:48,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:48,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:48,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:48,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:48,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:48,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:48,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:48,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:48,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:48,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:48,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:48,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:17:48,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:48,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:48,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:48,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:48,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:48,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:17:48,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300660065] [2020-10-28 09:17:48,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:48,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:17:48,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684145240] [2020-10-28 09:17:48,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:17:48,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:48,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:17:48,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:17:48,433 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 12 states. [2020-10-28 09:17:48,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:48,794 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2020-10-28 09:17:48,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:17:48,795 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-28 09:17:48,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:48,796 INFO L225 Difference]: With dead ends: 93 [2020-10-28 09:17:48,796 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 09:17:48,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:17:48,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 09:17:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2020-10-28 09:17:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:17:48,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-28 09:17:48,808 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2020-10-28 09:17:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:48,809 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-28 09:17:48,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:17:48,809 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-28 09:17:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:17:48,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:48,812 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:48,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:17:48,812 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:48,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 10 times [2020-10-28 09:17:48,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:48,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130219356] [2020-10-28 09:17:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:48,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:49,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:49,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:50,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:50,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:51,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:51,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:52,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:52,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:53,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:53,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:53,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:53,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:17:53,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:17:53,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:17:53,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:53,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:53,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:17:53,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:17:53,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:17:53,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:56,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:17:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:56,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:56,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:56,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:17:56,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:56,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:17:56,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:56,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:56,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:56,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:17:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:56,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:56,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:17:56,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:17:56,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:17:56,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:17:56,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:17:56,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:17:56,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:17:56,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:17:56,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:17:56,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:17:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:17:56,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130219356] [2020-10-28 09:17:56,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:17:56,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:17:56,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292106440] [2020-10-28 09:17:56,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:17:56,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:17:56,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:17:56,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:17:56,836 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 33 states. [2020-10-28 09:17:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:17:59,493 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-10-28 09:17:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:17:59,493 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 52 [2020-10-28 09:17:59,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:17:59,495 INFO L225 Difference]: With dead ends: 96 [2020-10-28 09:17:59,495 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 09:17:59,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=150, Invalid=1830, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 09:17:59,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 09:17:59,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2020-10-28 09:17:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:17:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-28 09:17:59,510 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 52 [2020-10-28 09:17:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:17:59,510 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-28 09:17:59,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:17:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-28 09:17:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:17:59,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:17:59,511 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:17:59,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:17:59,512 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:17:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:17:59,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1426484168, now seen corresponding path program 5 times [2020-10-28 09:17:59,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:17:59,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180822345] [2020-10-28 09:17:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:17:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:17:59,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:59,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:59,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:59,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:59,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:17:59,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:00,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:00,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:00,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:00,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:01,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:01,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:03,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:03,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:04,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:04,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:04,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:18:04,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 09:18:04,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:18:04,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:04,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:04,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:18:04,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:04,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:18:04,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:05,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:05,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:05,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:05,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:05,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:05,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:18:05,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:05,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:05,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:05,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:05,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:05,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:05,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:05,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:05,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:05,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:05,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:05,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:05,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:05,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:05,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:05,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:05,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:05,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:18:05,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180822345] [2020-10-28 09:18:05,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:05,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:18:05,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951816256] [2020-10-28 09:18:05,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:18:05,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:05,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:18:05,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:18:05,050 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 21 states. [2020-10-28 09:18:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:06,239 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2020-10-28 09:18:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:18:06,240 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-28 09:18:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:06,241 INFO L225 Difference]: With dead ends: 146 [2020-10-28 09:18:06,241 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 09:18:06,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:18:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 09:18:06,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 92. [2020-10-28 09:18:06,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 09:18:06,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2020-10-28 09:18:06,260 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 52 [2020-10-28 09:18:06,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:06,261 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2020-10-28 09:18:06,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:18:06,261 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2020-10-28 09:18:06,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:18:06,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:06,262 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:06,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:18:06,262 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:06,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:06,262 INFO L82 PathProgramCache]: Analyzing trace with hash -960684668, now seen corresponding path program 6 times [2020-10-28 09:18:06,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:06,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539943334] [2020-10-28 09:18:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:06,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:06,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:06,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:07,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:07,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:07,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:08,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:08,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:08,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:09,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:09,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:09,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:09,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:11,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:11,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:18:11,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:18:11,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:18:11,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:11,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:11,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:18:11,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:18:11,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:18:11,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:11,685 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-28 09:18:12,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:12,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:12,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:12,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:12,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:12,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:18:12,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:12,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:12,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:12,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:12,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:12,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:12,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:12,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:12,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:12,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:12,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:12,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:12,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:12,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:12,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:12,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:12,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:12,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:18:12,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539943334] [2020-10-28 09:18:12,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:12,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:18:12,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947397373] [2020-10-28 09:18:12,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:18:12,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:12,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:18:12,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:18:12,099 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand 18 states. [2020-10-28 09:18:12,629 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-28 09:18:12,863 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 31 [2020-10-28 09:18:13,561 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-28 09:18:14,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:14,222 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2020-10-28 09:18:14,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:18:14,223 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-28 09:18:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:14,224 INFO L225 Difference]: With dead ends: 141 [2020-10-28 09:18:14,224 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 09:18:14,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:18:14,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 09:18:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2020-10-28 09:18:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 09:18:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-10-28 09:18:14,243 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 52 [2020-10-28 09:18:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:14,243 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-10-28 09:18:14,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:18:14,244 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-10-28 09:18:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:18:14,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:14,244 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:14,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:18:14,245 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:14,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1038990776, now seen corresponding path program 7 times [2020-10-28 09:18:14,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:14,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029799850] [2020-10-28 09:18:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:14,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:14,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:14,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:14,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:16,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:16,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:17,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:17,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:17,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:18,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:18,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:18,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:18,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:19,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:19,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:19,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:18:19,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 09:18:19,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:18:19,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:19,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:19,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:18:19,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:18:19,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:18:19,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:19,533 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-28 09:18:19,792 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-28 09:18:20,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:20,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:20,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:20,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:20,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:20,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:20,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:20,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:20,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:20,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:20,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:20,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:20,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:20,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:20,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:18:20,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:20,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:20,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:20,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:20,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:20,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 09:18:20,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029799850] [2020-10-28 09:18:20,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:20,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:18:20,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411283362] [2020-10-28 09:18:20,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:18:20,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:20,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:18:20,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:18:20,124 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 17 states. [2020-10-28 09:18:21,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:21,170 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2020-10-28 09:18:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:18:21,170 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-28 09:18:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:21,171 INFO L225 Difference]: With dead ends: 124 [2020-10-28 09:18:21,171 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 09:18:21,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:18:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 09:18:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2020-10-28 09:18:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 09:18:21,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2020-10-28 09:18:21,185 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 52 [2020-10-28 09:18:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:21,186 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2020-10-28 09:18:21,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:18:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2020-10-28 09:18:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:18:21,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:21,187 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:21,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:18:21,187 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:21,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:21,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1528543876, now seen corresponding path program 11 times [2020-10-28 09:18:21,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:21,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967185756] [2020-10-28 09:18:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:21,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:21,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:23,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:23,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:18:23,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:18:23,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2495 [2020-10-28 09:18:23,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:23,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:23,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:18:23,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:23,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:18:23,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:23,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:23,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:23,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:23,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:23,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:23,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:23,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:23,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:23,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:23,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:23,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:23,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:23,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:23,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:23,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:23,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:23,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:23,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:18:23,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:23,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:23,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:23,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:23,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:23,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 09:18:23,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967185756] [2020-10-28 09:18:23,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:23,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:18:23,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606692074] [2020-10-28 09:18:23,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:18:23,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:23,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:18:23,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:18:23,868 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand 14 states. [2020-10-28 09:18:24,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:24,363 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2020-10-28 09:18:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:18:24,364 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-28 09:18:24,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:24,365 INFO L225 Difference]: With dead ends: 155 [2020-10-28 09:18:24,365 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 09:18:24,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:18:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 09:18:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-28 09:18:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 09:18:24,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-28 09:18:24,379 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 54 [2020-10-28 09:18:24,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:24,380 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-28 09:18:24,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:18:24,380 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-28 09:18:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:18:24,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:24,381 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:24,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:18:24,381 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:24,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 12 times [2020-10-28 09:18:24,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:24,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753157685] [2020-10-28 09:18:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:24,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:24,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:25,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:25,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:26,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:27,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:29,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:29,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:29,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:18:29,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:18:29,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:18:29,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:29,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:29,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:18:29,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:29,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 09:18:29,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:29,971 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-28 09:18:30,298 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-28 09:18:30,542 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-28 09:18:30,712 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-28 09:18:31,081 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-28 09:18:31,567 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-10-28 09:18:32,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:32,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:32,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:32,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:32,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:32,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:18:32,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:32,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:32,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:32,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:32,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:32,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:32,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:32,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:32,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:32,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:32,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:32,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:18:32,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:32,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:32,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:32,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:32,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:32,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 09:18:33,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753157685] [2020-10-28 09:18:33,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:33,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:18:33,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920709478] [2020-10-28 09:18:33,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:18:33,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:33,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:18:33,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1038, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:18:33,013 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 34 states. [2020-10-28 09:18:34,053 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 42 [2020-10-28 09:18:34,362 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-28 09:18:34,600 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 46 [2020-10-28 09:18:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:35,860 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-10-28 09:18:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:18:35,862 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 59 [2020-10-28 09:18:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:35,863 INFO L225 Difference]: With dead ends: 94 [2020-10-28 09:18:35,863 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 09:18:35,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=126, Invalid=1596, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:18:35,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 09:18:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2020-10-28 09:18:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 09:18:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2020-10-28 09:18:35,879 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 59 [2020-10-28 09:18:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:35,880 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2020-10-28 09:18:35,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:18:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2020-10-28 09:18:35,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:18:35,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:35,880 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:35,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:18:35,881 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:35,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:35,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1786718545, now seen corresponding path program 8 times [2020-10-28 09:18:35,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:35,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248221554] [2020-10-28 09:18:35,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:35,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:35,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:36,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:36,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:36,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:36,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:36,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:36,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:37,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:37,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:37,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:38,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:38,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:39,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:40,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:40,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:40,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:40,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:40,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:40,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:18:40,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 09:18:40,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:18:40,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:40,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:18:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:18:40,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:41,939 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2020-10-28 09:18:42,118 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-28 09:18:42,261 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2020-10-28 09:18:42,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:42,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:42,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:42,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:42,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:42,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:42,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:42,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:42,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:42,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:42,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:42,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:42,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:42,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:42,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:42,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:42,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:42,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:18:42,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:42,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:42,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:42,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:42,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:42,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 09:18:42,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248221554] [2020-10-28 09:18:42,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:42,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:18:42,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137527445] [2020-10-28 09:18:42,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:18:42,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:42,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:18:42,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:18:42,716 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 23 states. [2020-10-28 09:18:43,677 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-28 09:18:43,863 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-28 09:18:44,017 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2020-10-28 09:18:44,329 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-28 09:18:44,549 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-28 09:18:44,748 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-28 09:18:44,902 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2020-10-28 09:18:45,403 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-28 09:18:45,781 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-28 09:18:46,001 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-28 09:18:46,710 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-28 09:18:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:47,046 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2020-10-28 09:18:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-28 09:18:47,047 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-10-28 09:18:47,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:47,048 INFO L225 Difference]: With dead ends: 126 [2020-10-28 09:18:47,048 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 09:18:47,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=734, Invalid=2458, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 09:18:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 09:18:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2020-10-28 09:18:47,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 09:18:47,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2020-10-28 09:18:47,071 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 59 [2020-10-28 09:18:47,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:47,071 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2020-10-28 09:18:47,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:18:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2020-10-28 09:18:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:18:47,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:47,072 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:47,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:18:47,072 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:47,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1230003213, now seen corresponding path program 9 times [2020-10-28 09:18:47,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:47,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862146574] [2020-10-28 09:18:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:47,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:47,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:47,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:47,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:47,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:47,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:49,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:49,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:50,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:50,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:50,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:50,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:50,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:50,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:51,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:52,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:52,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:18:52,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 09:18:52,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 09:18:52,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:52,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:18:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 09:18:52,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:18:52,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:52,406 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-10-28 09:18:52,590 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2020-10-28 09:18:53,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:53,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:53,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:53,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:53,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:53,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:53,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:53,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:53,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:53,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:53,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:53,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:53,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:53,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:53,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:53,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:53,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:53,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:53,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:53,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:53,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 09:18:53,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862146574] [2020-10-28 09:18:53,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:53,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:18:53,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14056168] [2020-10-28 09:18:53,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:18:53,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:53,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:18:53,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:18:53,199 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand 20 states. [2020-10-28 09:18:53,725 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-28 09:18:54,601 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-28 09:18:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:55,223 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2020-10-28 09:18:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:18:55,223 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-28 09:18:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:55,225 INFO L225 Difference]: With dead ends: 139 [2020-10-28 09:18:55,226 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 09:18:55,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:18:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 09:18:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 111. [2020-10-28 09:18:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 09:18:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 135 transitions. [2020-10-28 09:18:55,249 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 135 transitions. Word has length 59 [2020-10-28 09:18:55,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:55,249 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 135 transitions. [2020-10-28 09:18:55,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:18:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 135 transitions. [2020-10-28 09:18:55,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:18:55,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:55,250 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:55,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:18:55,250 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:55,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:55,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1007722543, now seen corresponding path program 10 times [2020-10-28 09:18:55,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:55,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678087473] [2020-10-28 09:18:55,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:55,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:55,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:55,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:57,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:57,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:00,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:00,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:00,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:19:00,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:19:00,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:19:00,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:00,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:19:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:19:00,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:00,956 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2020-10-28 09:19:01,100 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2020-10-28 09:19:01,266 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2020-10-28 09:19:01,473 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-28 09:19:01,613 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-28 09:19:01,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:01,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:01,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:01,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:01,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:01,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:01,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:01,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:01,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:01,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:01,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:01,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:01,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:01,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:01,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:01,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:01,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:01,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:19:01,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:01,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:01,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:01,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:01,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 09:19:01,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678087473] [2020-10-28 09:19:01,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:01,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:19:01,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251606798] [2020-10-28 09:19:01,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:19:01,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:01,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:19:01,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:19:01,899 INFO L87 Difference]: Start difference. First operand 111 states and 135 transitions. Second operand 21 states. [2020-10-28 09:19:02,470 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-28 09:19:03,524 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-28 09:19:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:03,766 INFO L93 Difference]: Finished difference Result 206 states and 256 transitions. [2020-10-28 09:19:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:19:03,767 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-28 09:19:03,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:03,769 INFO L225 Difference]: With dead ends: 206 [2020-10-28 09:19:03,769 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 09:19:03,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:19:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 09:19:03,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2020-10-28 09:19:03,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 09:19:03,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2020-10-28 09:19:03,795 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 59 [2020-10-28 09:19:03,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:03,796 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2020-10-28 09:19:03,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:19:03,796 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2020-10-28 09:19:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:19:03,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:03,797 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:03,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:19:03,797 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:03,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:03,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1386648973, now seen corresponding path program 11 times [2020-10-28 09:19:03,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:03,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913097610] [2020-10-28 09:19:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:03,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:03,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:05,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:05,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:05,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:06,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:08,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:08,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:08,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:08,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:19:08,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:19:08,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:19:08,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:08,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:08,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:19:08,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:08,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:19:08,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:08,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:08,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:08,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:08,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:08,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:08,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:08,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:08,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:08,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:08,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:08,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:08,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:08,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:08,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:08,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:08,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:08,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:08,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:19:08,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:08,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:08,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:08,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:08,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:08,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-28 09:19:08,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913097610] [2020-10-28 09:19:08,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:08,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:19:08,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16099994] [2020-10-28 09:19:08,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:19:08,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:08,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:19:08,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:19:08,979 INFO L87 Difference]: Start difference. First operand 137 states and 167 transitions. Second operand 9 states. [2020-10-28 09:19:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:09,374 INFO L93 Difference]: Finished difference Result 186 states and 227 transitions. [2020-10-28 09:19:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:19:09,375 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-28 09:19:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:09,377 INFO L225 Difference]: With dead ends: 186 [2020-10-28 09:19:09,377 INFO L226 Difference]: Without dead ends: 110 [2020-10-28 09:19:09,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:19:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-28 09:19:09,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2020-10-28 09:19:09,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 09:19:09,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2020-10-28 09:19:09,395 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 59 [2020-10-28 09:19:09,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:09,395 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2020-10-28 09:19:09,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:19:09,395 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2020-10-28 09:19:09,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:19:09,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:09,396 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:09,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:19:09,397 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2049569357, now seen corresponding path program 13 times [2020-10-28 09:19:09,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:09,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389447728] [2020-10-28 09:19:09,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:09,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:09,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:13,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:13,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:19:13,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:13,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4438 [2020-10-28 09:19:13,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:13,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:13,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:19:13,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:13,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:19:13,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:14,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:14,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:14,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:14,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:14,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:14,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:14,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:14,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:14,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:14,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:14,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:14,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:14,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:14,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:14,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:14,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:14,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:14,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:14,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:14,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:14,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:14,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-28 09:19:14,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389447728] [2020-10-28 09:19:14,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:14,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:19:14,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720312431] [2020-10-28 09:19:14,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:19:14,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:14,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:19:14,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:19:14,109 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand 16 states. [2020-10-28 09:19:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:14,722 INFO L93 Difference]: Finished difference Result 198 states and 229 transitions. [2020-10-28 09:19:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:19:14,723 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-28 09:19:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:14,725 INFO L225 Difference]: With dead ends: 198 [2020-10-28 09:19:14,725 INFO L226 Difference]: Without dead ends: 131 [2020-10-28 09:19:14,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:19:14,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-28 09:19:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2020-10-28 09:19:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 09:19:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2020-10-28 09:19:14,746 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 61 [2020-10-28 09:19:14,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:14,746 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2020-10-28 09:19:14,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:19:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2020-10-28 09:19:14,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:19:14,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:14,747 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:14,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:19:14,747 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:14,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1206194957, now seen corresponding path program 12 times [2020-10-28 09:19:14,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:14,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90973063] [2020-10-28 09:19:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:14,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:15,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:16,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:18,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:19,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:19,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:19,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:19:19,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:19:19,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:19:19,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:19,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:19,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:19:19,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:19,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 09:19:19,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:20,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:20,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:20,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:20,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:20,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:20,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:20,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:20,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:20,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:20,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:20,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:20,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:20,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:20,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:20,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:20,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:20,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:20,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:19:20,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:20,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:20,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:20,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:20,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:20,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-28 09:19:20,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90973063] [2020-10-28 09:19:20,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:20,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:19:20,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482406620] [2020-10-28 09:19:20,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:19:20,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:20,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:19:20,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:19:20,026 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand 16 states. [2020-10-28 09:19:20,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:20,800 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2020-10-28 09:19:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:19:20,801 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-28 09:19:20,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:20,803 INFO L225 Difference]: With dead ends: 123 [2020-10-28 09:19:20,803 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 09:19:20,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:19:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 09:19:20,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 76. [2020-10-28 09:19:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:19:20,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-10-28 09:19:20,822 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 61 [2020-10-28 09:19:20,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:20,822 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-10-28 09:19:20,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:19:20,822 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-10-28 09:19:20,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:19:20,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:20,823 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:20,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:19:20,823 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:20,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:20,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1874321502, now seen corresponding path program 14 times [2020-10-28 09:19:20,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:20,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909863923] [2020-10-28 09:19:20,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:20,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:23,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:25,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:19:25,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:19:25,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:19:25,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:25,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:25,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-28 09:19:25,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:25,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:19:25,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:26,878 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-28 09:19:27,006 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-28 09:19:27,231 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-28 09:19:27,403 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-28 09:19:27,578 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-28 09:19:27,742 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-10-28 09:19:27,999 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 52 [2020-10-28 09:19:28,228 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2020-10-28 09:19:28,495 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-28 09:19:28,732 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-28 09:19:28,987 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-10-28 09:19:29,199 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2020-10-28 09:19:29,425 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-28 09:19:29,717 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-28 09:19:29,965 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-28 09:19:30,245 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-28 09:19:30,545 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-28 09:19:30,801 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-28 09:19:31,035 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-28 09:19:31,272 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-28 09:19:31,546 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-28 09:19:31,795 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-28 09:19:32,129 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-28 09:19:32,389 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-28 09:19:32,648 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-28 09:19:32,892 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-28 09:19:33,145 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-28 09:19:33,383 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-28 09:19:33,636 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-28 09:19:33,845 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2020-10-28 09:19:34,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:34,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:34,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:34,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:34,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:34,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:34,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:34,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:34,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:34,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:34,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:34,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:34,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:34,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:34,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:34,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:34,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:34,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:34,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:34,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:34,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:34,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:34,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909863923] [2020-10-28 09:19:34,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:34,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-28 09:19:34,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158860878] [2020-10-28 09:19:34,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-28 09:19:34,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:34,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-28 09:19:34,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 09:19:34,598 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 46 states. [2020-10-28 09:19:35,947 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 79 [2020-10-28 09:19:36,242 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-28 09:19:37,047 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 89 [2020-10-28 09:19:37,762 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 67 [2020-10-28 09:19:38,197 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-28 09:19:38,566 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-28 09:19:39,046 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-28 09:19:39,666 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 93 [2020-10-28 09:19:40,241 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 99 [2020-10-28 09:19:41,280 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 99 [2020-10-28 09:19:42,367 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 101 [2020-10-28 09:19:42,967 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 78 [2020-10-28 09:19:43,504 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 76 [2020-10-28 09:19:44,309 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 88 [2020-10-28 09:19:44,860 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 66 [2020-10-28 09:19:45,470 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 85 [2020-10-28 09:19:45,947 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 60 [2020-10-28 09:19:47,209 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 133 DAG size of output: 98 [2020-10-28 09:19:47,977 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 87 [2020-10-28 09:19:48,358 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 81 [2020-10-28 09:19:48,566 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2020-10-28 09:19:49,112 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2020-10-28 09:19:50,311 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 148 DAG size of output: 113 [2020-10-28 09:19:50,884 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 91 [2020-10-28 09:19:51,984 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 97 [2020-10-28 09:19:52,693 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 93 [2020-10-28 09:19:53,039 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 60 [2020-10-28 09:19:53,687 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2020-10-28 09:19:53,918 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-28 09:19:54,539 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2020-10-28 09:19:55,289 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 96 [2020-10-28 09:19:55,737 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-28 09:19:56,048 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-28 09:19:56,535 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2020-10-28 09:19:57,649 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 92 [2020-10-28 09:19:58,514 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-28 09:19:58,745 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-28 09:19:59,104 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-28 09:19:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:59,523 INFO L93 Difference]: Finished difference Result 151 states and 175 transitions. [2020-10-28 09:19:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-28 09:19:59,524 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 66 [2020-10-28 09:19:59,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:59,525 INFO L225 Difference]: With dead ends: 151 [2020-10-28 09:19:59,525 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 09:19:59,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2316 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=1140, Invalid=6342, Unknown=0, NotChecked=0, Total=7482 [2020-10-28 09:19:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 09:19:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 96. [2020-10-28 09:19:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:19:59,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-10-28 09:19:59,556 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 66 [2020-10-28 09:19:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:59,556 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-10-28 09:19:59,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-28 09:19:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-10-28 09:19:59,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:19:59,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:59,557 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:59,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:19:59,558 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:59,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:59,558 INFO L82 PathProgramCache]: Analyzing trace with hash 68883168, now seen corresponding path program 13 times [2020-10-28 09:19:59,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:59,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265913662] [2020-10-28 09:19:59,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:59,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:01,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:01,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:03,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:03,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:20:04,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 09:20:04,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:20:04,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:20:04,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:04,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:20:04,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:05,208 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2020-10-28 09:20:05,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:05,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:05,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:05,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:05,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:05,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:05,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:05,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:05,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:05,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:05,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:05,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:05,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:05,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:05,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:05,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:05,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:05,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:05,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:05,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:05,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:05,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:05,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:05,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-28 09:20:05,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265913662] [2020-10-28 09:20:05,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:05,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:20:05,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670905057] [2020-10-28 09:20:05,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:20:05,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:05,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:20:05,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:20:05,759 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 23 states. [2020-10-28 09:20:06,256 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-10-28 09:20:06,739 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-28 09:20:06,916 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-28 09:20:07,690 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-28 09:20:07,997 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-28 09:20:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:08,451 INFO L93 Difference]: Finished difference Result 136 states and 155 transitions. [2020-10-28 09:20:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:20:08,452 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-10-28 09:20:08,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:08,453 INFO L225 Difference]: With dead ends: 136 [2020-10-28 09:20:08,453 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 09:20:08,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=421, Invalid=1649, Unknown=0, NotChecked=0, Total=2070 [2020-10-28 09:20:08,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 09:20:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2020-10-28 09:20:08,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:20:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-28 09:20:08,471 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 66 [2020-10-28 09:20:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:08,471 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-28 09:20:08,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:20:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-28 09:20:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:20:08,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:08,473 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:08,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:20:08,473 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1936361116, now seen corresponding path program 14 times [2020-10-28 09:20:08,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:08,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532105993] [2020-10-28 09:20:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:08,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:13,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:20:13,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:20:13,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:20:13,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:13,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:13,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:20:13,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:20:13,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:20:13,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:14,096 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-10-28 09:20:14,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:14,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:14,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:14,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:14,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:14,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:14,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:14,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:14,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:14,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:14,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:14,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:14,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:14,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:14,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:14,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:14,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:14,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:14,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:14,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:14,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:14,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 55 proven. 47 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 09:20:14,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532105993] [2020-10-28 09:20:14,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:14,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:20:14,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516362129] [2020-10-28 09:20:14,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:20:14,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:14,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:20:14,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:20:14,804 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 23 states. [2020-10-28 09:20:15,860 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-28 09:20:16,267 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-28 09:20:16,460 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-28 09:20:17,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:17,030 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2020-10-28 09:20:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:20:17,032 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2020-10-28 09:20:17,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:17,032 INFO L225 Difference]: With dead ends: 120 [2020-10-28 09:20:17,032 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 09:20:17,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 09:20:17,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 09:20:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-10-28 09:20:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 09:20:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-10-28 09:20:17,054 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 66 [2020-10-28 09:20:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:17,055 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-10-28 09:20:17,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:20:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-10-28 09:20:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:20:17,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:17,056 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:17,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:20:17,056 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:17,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1034442400, now seen corresponding path program 15 times [2020-10-28 09:20:17,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:17,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836809415] [2020-10-28 09:20:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:17,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:17,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:17,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:17,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:17,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:17,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking...