/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-examples/standard_copy8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:55:02,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:55:02,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:55:02,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:55:02,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:55:02,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:55:02,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:55:02,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:55:02,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:55:02,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:55:02,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:55:02,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:55:02,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:55:02,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:55:02,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:55:02,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:55:02,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:55:02,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:55:02,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:55:02,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:55:02,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:55:02,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:55:02,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:55:02,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:55:02,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:55:02,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:55:02,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:55:02,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:55:02,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:55:02,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:55:02,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:55:02,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:55:02,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:55:02,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:55:02,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:55:02,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:55:02,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:55:02,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:55:02,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:55:02,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:55:02,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:55:02,508 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 08:55:02,535 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:55:02,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:55:02,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:55:02,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:55:02,538 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:55:02,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:55:02,538 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:55:02,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:55:02,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:55:02,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:55:02,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:55:02,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:55:02,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:55:02,540 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:55:02,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:55:02,540 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:55:02,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:55:02,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:55:02,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:55:02,541 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:55:02,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:55:02,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:55:02,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:55:02,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:55:02,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:55:02,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:55:02,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:55:02,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:55:02,543 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:55:02,543 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:55:02,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:55:02,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:55:02,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:55:02,954 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:55:02,955 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:55:02,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2020-10-28 08:55:03,036 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4aad343ca/7efba2373d414aa3a59a1962c4fe6d48/FLAG323487664 [2020-10-28 08:55:03,650 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:55:03,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2020-10-28 08:55:03,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4aad343ca/7efba2373d414aa3a59a1962c4fe6d48/FLAG323487664 [2020-10-28 08:55:04,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4aad343ca/7efba2373d414aa3a59a1962c4fe6d48 [2020-10-28 08:55:04,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:55:04,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:55:04,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:55:04,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:55:04,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:55:04,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:55:04" (1/1) ... [2020-10-28 08:55:04,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34aa4f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:04, skipping insertion in model container [2020-10-28 08:55:04,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:55:04" (1/1) ... [2020-10-28 08:55:04,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:55:04,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:55:04,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:55:04,275 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:55:04,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:55:04,330 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:55:04,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:04 WrapperNode [2020-10-28 08:55:04,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:55:04,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:55:04,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:55:04,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:55:04,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:04" (1/1) ... [2020-10-28 08:55:04,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:04" (1/1) ... [2020-10-28 08:55:04,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:04" (1/1) ... [2020-10-28 08:55:04,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:04" (1/1) ... [2020-10-28 08:55:04,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:04" (1/1) ... [2020-10-28 08:55:04,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:04" (1/1) ... [2020-10-28 08:55:04,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:04" (1/1) ... [2020-10-28 08:55:04,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:55:04,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:55:04,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:55:04,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:55:04,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:04" (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 08:55:04,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:55:04,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:55:04,507 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:55:04,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:55:04,508 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:55:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:55:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:55:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:55:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:55:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:55:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:55:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:55:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:55:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:55:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:55:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:55:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:55:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:55:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:55:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:55:05,158 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:55:05,158 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-28 08:55:05,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:55:05 BoogieIcfgContainer [2020-10-28 08:55:05,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:55:05,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:55:05,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:55:05,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:55:05,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:55:04" (1/3) ... [2020-10-28 08:55:05,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3f5dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:55:05, skipping insertion in model container [2020-10-28 08:55:05,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:55:04" (2/3) ... [2020-10-28 08:55:05,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3f5dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:55:05, skipping insertion in model container [2020-10-28 08:55:05,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:55:05" (3/3) ... [2020-10-28 08:55:05,170 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-1.i [2020-10-28 08:55:05,183 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:55:05,189 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:55:05,204 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:55:05,233 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:55:05,234 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:55:05,234 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:55:05,234 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:55:05,234 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:55:05,234 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:55:05,235 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:55:05,235 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:55:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-10-28 08:55:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 08:55:05,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:05,263 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 08:55:05,264 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:05,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1242794554, now seen corresponding path program 1 times [2020-10-28 08:55:05,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:05,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072775204] [2020-10-28 08:55:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:05,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:05,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:05,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:05,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:05,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:05,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:05,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:05,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:06,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:07,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:07,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 08:55:07,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:55:07,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2532 [2020-10-28 08:55:07,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:07,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:07,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:07,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 08:55:07,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:07,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:55:08,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:08,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:08,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:08,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:08,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 08:55:08,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:08,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:08,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:08,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:08,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:08,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:08,103 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 08:55:08,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072775204] [2020-10-28 08:55:08,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:55:08,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:55:08,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199630015] [2020-10-28 08:55:08,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:55:08,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:08,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:55:08,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:55:08,141 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2020-10-28 08:55:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:08,353 INFO L93 Difference]: Finished difference Result 95 states and 137 transitions. [2020-10-28 08:55:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:55:08,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-28 08:55:08,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:08,364 INFO L225 Difference]: With dead ends: 95 [2020-10-28 08:55:08,364 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 08:55:08,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:55:08,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 08:55:08,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 08:55:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 08:55:08,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-10-28 08:55:08,415 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 31 [2020-10-28 08:55:08,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:08,415 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-10-28 08:55:08,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:55:08,415 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-10-28 08:55:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 08:55:08,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:08,417 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 08:55:08,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:55:08,418 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:08,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:08,419 INFO L82 PathProgramCache]: Analyzing trace with hash 443594030, now seen corresponding path program 1 times [2020-10-28 08:55:08,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:08,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578790017] [2020-10-28 08:55:08,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:08,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:08,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:13,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 08:55:13,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 08:55:13,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:55:13,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:13,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:13,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:55:13,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:55:13,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:55:13,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 08:55:13,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:13,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:13,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:13,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:13,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:13,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:13,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:13,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:13,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:13,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:13,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:13,517 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 08:55:13,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578790017] [2020-10-28 08:55:13,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:55:13,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:55:13,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112762554] [2020-10-28 08:55:13,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:55:13,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:13,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:55:13,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:13,522 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 4 states. [2020-10-28 08:55:13,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:13,801 INFO L93 Difference]: Finished difference Result 95 states and 119 transitions. [2020-10-28 08:55:13,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:55:13,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-28 08:55:13,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:13,803 INFO L225 Difference]: With dead ends: 95 [2020-10-28 08:55:13,803 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 08:55:13,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:13,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 08:55:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-10-28 08:55:13,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 08:55:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-28 08:55:13,816 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 31 [2020-10-28 08:55:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:13,817 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-28 08:55:13,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:55:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-28 08:55:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 08:55:13,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:13,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:13,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:55:13,819 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:13,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:13,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2114218722, now seen corresponding path program 1 times [2020-10-28 08:55:13,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:13,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848648102] [2020-10-28 08:55:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:13,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:14,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:15,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:18,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 08:55:18,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:55:18,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 08:55:18,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:18,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:18,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:55:18,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:55:18,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:55:18,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:18,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:18,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:18,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:18,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:18,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:18,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:55:18,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:18,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:18,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:18,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:18,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:18,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 08:55:18,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848648102] [2020-10-28 08:55:18,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:18,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:55:18,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518986123] [2020-10-28 08:55:18,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:55:18,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:18,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:55:18,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:18,919 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 5 states. [2020-10-28 08:55:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:19,172 INFO L93 Difference]: Finished difference Result 118 states and 142 transitions. [2020-10-28 08:55:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:55:19,172 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-28 08:55:19,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:19,174 INFO L225 Difference]: With dead ends: 118 [2020-10-28 08:55:19,177 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 08:55:19,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:19,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 08:55:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-10-28 08:55:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 08:55:19,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-10-28 08:55:19,204 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 47 [2020-10-28 08:55:19,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:19,206 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-10-28 08:55:19,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:55:19,206 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-10-28 08:55:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:55:19,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:19,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:19,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:55:19,211 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:19,215 INFO L82 PathProgramCache]: Analyzing trace with hash 926373134, now seen corresponding path program 2 times [2020-10-28 08:55:19,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:19,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511445258] [2020-10-28 08:55:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:19,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:19,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:19,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:19,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:19,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:19,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:19,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:24,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:55:24,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:55:24,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:55:24,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:24,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:24,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:55:24,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:24,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:55:24,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:24,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:24,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:24,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:24,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:24,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:24,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:24,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:24,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:24,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:24,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:24,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-28 08:55:24,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511445258] [2020-10-28 08:55:24,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:55:24,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:55:24,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964634947] [2020-10-28 08:55:24,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:55:24,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:24,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:55:24,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:24,353 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 4 states. [2020-10-28 08:55:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:24,527 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2020-10-28 08:55:24,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:55:24,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-10-28 08:55:24,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:24,529 INFO L225 Difference]: With dead ends: 132 [2020-10-28 08:55:24,529 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 08:55:24,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:24,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 08:55:24,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-28 08:55:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 08:55:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-28 08:55:24,556 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 63 [2020-10-28 08:55:24,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:24,557 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-28 08:55:24,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:55:24,557 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-28 08:55:24,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 08:55:24,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:24,559 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:24,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:55:24,559 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:24,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1026858900, now seen corresponding path program 1 times [2020-10-28 08:55:24,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:24,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096701335] [2020-10-28 08:55:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:24,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:24,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:25,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:29,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 08:55:29,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:55:29,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:55:29,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:29,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:29,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:55:29,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:55:29,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:55:29,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:29,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:29,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:29,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:29,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:29,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:29,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:29,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:29,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:29,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:29,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:29,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-28 08:55:29,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096701335] [2020-10-28 08:55:29,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:29,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:55:29,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437026728] [2020-10-28 08:55:29,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:55:29,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:29,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:55:29,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:29,663 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 6 states. [2020-10-28 08:55:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:29,896 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2020-10-28 08:55:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:55:29,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 08:55:29,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:29,898 INFO L225 Difference]: With dead ends: 149 [2020-10-28 08:55:29,898 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 08:55:29,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 08:55:29,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2020-10-28 08:55:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 08:55:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-10-28 08:55:29,909 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 65 [2020-10-28 08:55:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:29,910 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-10-28 08:55:29,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:55:29,910 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-10-28 08:55:29,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:55:29,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:29,912 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:29,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:55:29,912 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:29,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:29,913 INFO L82 PathProgramCache]: Analyzing trace with hash -635337636, now seen corresponding path program 2 times [2020-10-28 08:55:29,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:29,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900940288] [2020-10-28 08:55:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:29,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:29,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:30,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:30,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:30,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:34,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:55:34,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:55:34,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 08:55:34,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:34,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:34,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:55:34,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:34,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:55:34,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:35,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:35,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:35,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:35,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:35,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:35,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:35,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:35,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:35,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:35,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:35,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:35,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-28 08:55:35,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900940288] [2020-10-28 08:55:35,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:35,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:55:35,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431138337] [2020-10-28 08:55:35,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:55:35,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:35,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:55:35,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:35,048 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 5 states. [2020-10-28 08:55:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:35,172 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2020-10-28 08:55:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:55:35,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-10-28 08:55:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:35,174 INFO L225 Difference]: With dead ends: 166 [2020-10-28 08:55:35,174 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 08:55:35,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:35,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 08:55:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-28 08:55:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 08:55:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2020-10-28 08:55:35,195 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 81 [2020-10-28 08:55:35,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:35,196 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2020-10-28 08:55:35,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:55:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2020-10-28 08:55:35,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:55:35,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:35,201 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:35,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:55:35,203 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:35,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:35,204 INFO L82 PathProgramCache]: Analyzing trace with hash -8866758, now seen corresponding path program 3 times [2020-10-28 08:55:35,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:35,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833128782] [2020-10-28 08:55:35,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:35,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:35,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:35,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:35,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:35,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:35,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:40,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:40,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:55:40,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:55:40,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:55:40,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:40,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:40,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:55:40,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:55:40,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:55:40,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:40,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:40,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:40,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:40,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:40,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:40,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:40,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:40,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:40,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:40,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:40,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:40,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-28 08:55:40,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833128782] [2020-10-28 08:55:40,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:40,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:55:40,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098762479] [2020-10-28 08:55:40,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:55:40,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:40,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:55:40,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:40,350 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 7 states. [2020-10-28 08:55:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:40,677 INFO L93 Difference]: Finished difference Result 181 states and 205 transitions. [2020-10-28 08:55:40,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:55:40,678 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 83 [2020-10-28 08:55:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:40,679 INFO L225 Difference]: With dead ends: 181 [2020-10-28 08:55:40,679 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 08:55:40,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 08:55:40,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-10-28 08:55:40,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 08:55:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2020-10-28 08:55:40,690 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 83 [2020-10-28 08:55:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:40,690 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2020-10-28 08:55:40,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:55:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2020-10-28 08:55:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 08:55:40,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:40,692 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:40,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:55:40,692 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:40,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1158167594, now seen corresponding path program 4 times [2020-10-28 08:55:40,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:40,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666855675] [2020-10-28 08:55:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:40,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:40,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:40,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:40,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:40,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:40,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:45,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:45,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 08:55:45,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:45,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:55:45,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:45,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:45,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:55:45,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:55:45,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:55:45,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:45,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:45,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:45,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:45,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:45,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:45,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:55:45,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:45,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:45,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:45,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:45,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:45,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-10-28 08:55:45,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666855675] [2020-10-28 08:55:45,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:45,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:55:45,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454343367] [2020-10-28 08:55:45,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:55:45,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:45,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:55:45,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:45,913 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand 8 states. [2020-10-28 08:55:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:46,334 INFO L93 Difference]: Finished difference Result 211 states and 235 transitions. [2020-10-28 08:55:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:55:46,334 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-28 08:55:46,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:46,336 INFO L225 Difference]: With dead ends: 211 [2020-10-28 08:55:46,336 INFO L226 Difference]: Without dead ends: 128 [2020-10-28 08:55:46,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-28 08:55:46,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-10-28 08:55:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 08:55:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2020-10-28 08:55:46,348 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 99 [2020-10-28 08:55:46,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:46,348 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2020-10-28 08:55:46,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:55:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2020-10-28 08:55:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 08:55:46,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:46,350 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:46,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:55:46,351 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:46,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:46,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2085051366, now seen corresponding path program 5 times [2020-10-28 08:55:46,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:46,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892727605] [2020-10-28 08:55:46,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:46,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:46,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:46,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:46,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:46,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:51,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:51,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 08:55:51,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:51,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 08:55:51,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:51,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:51,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:55:51,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:51,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:55:51,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:51,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:51,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:51,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:51,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:51,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:51,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:51,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:51,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:51,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:51,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:51,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:51,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-28 08:55:51,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892727605] [2020-10-28 08:55:51,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:51,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:55:51,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375639916] [2020-10-28 08:55:51,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:55:51,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:51,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:55:51,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:51,503 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand 6 states. [2020-10-28 08:55:51,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:51,670 INFO L93 Difference]: Finished difference Result 232 states and 250 transitions. [2020-10-28 08:55:51,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:55:51,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-10-28 08:55:51,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:51,671 INFO L225 Difference]: With dead ends: 232 [2020-10-28 08:55:51,672 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 08:55:51,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:51,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 08:55:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-28 08:55:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 08:55:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2020-10-28 08:55:51,693 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 115 [2020-10-28 08:55:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:51,693 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2020-10-28 08:55:51,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:55:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2020-10-28 08:55:51,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 08:55:51,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:51,695 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:51,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:55:51,696 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:51,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1904583560, now seen corresponding path program 6 times [2020-10-28 08:55:51,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:51,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173705509] [2020-10-28 08:55:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:51,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:51,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:51,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:51,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:51,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:52,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:56,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 08:55:56,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:56,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:55:56,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:56,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:56,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:55:56,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:55:56,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:55:56,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:56,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:56,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:56,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:56,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:56,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:56,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:56,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:56,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-10-28 08:55:56,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173705509] [2020-10-28 08:55:56,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:56,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:55:56,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561118698] [2020-10-28 08:55:56,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:55:56,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:56,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:55:56,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:55:56,860 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand 9 states. [2020-10-28 08:55:57,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:57,260 INFO L93 Difference]: Finished difference Result 243 states and 267 transitions. [2020-10-28 08:55:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:55:57,261 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 117 [2020-10-28 08:55:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:57,263 INFO L225 Difference]: With dead ends: 243 [2020-10-28 08:55:57,263 INFO L226 Difference]: Without dead ends: 146 [2020-10-28 08:55:57,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:55:57,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-28 08:55:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2020-10-28 08:55:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 08:55:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 147 transitions. [2020-10-28 08:55:57,279 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 147 transitions. Word has length 117 [2020-10-28 08:55:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:57,280 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 147 transitions. [2020-10-28 08:55:57,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:55:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 147 transitions. [2020-10-28 08:55:57,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 08:55:57,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:57,285 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:57,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:55:57,285 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:57,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:57,286 INFO L82 PathProgramCache]: Analyzing trace with hash -675600280, now seen corresponding path program 7 times [2020-10-28 08:55:57,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:57,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243306649] [2020-10-28 08:55:57,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:57,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:57,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:57,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:57,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:57,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:57,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:02,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:02,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 08:56:02,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:02,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 08:56:02,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:02,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:56:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:56:02,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:56:02,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:02,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:02,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:02,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:02,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:02,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:02,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:02,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:02,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:02,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-10-28 08:56:02,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243306649] [2020-10-28 08:56:02,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:02,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:56:02,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044957401] [2020-10-28 08:56:02,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:56:02,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:02,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:56:02,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:02,496 INFO L87 Difference]: Start difference. First operand 138 states and 147 transitions. Second operand 10 states. [2020-10-28 08:56:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:02,965 INFO L93 Difference]: Finished difference Result 273 states and 297 transitions. [2020-10-28 08:56:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:56:02,966 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-10-28 08:56:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:02,967 INFO L225 Difference]: With dead ends: 273 [2020-10-28 08:56:02,968 INFO L226 Difference]: Without dead ends: 162 [2020-10-28 08:56:02,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-28 08:56:02,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-10-28 08:56:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 08:56:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 163 transitions. [2020-10-28 08:56:02,976 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 163 transitions. Word has length 133 [2020-10-28 08:56:02,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:02,977 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 163 transitions. [2020-10-28 08:56:02,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:56:02,977 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 163 transitions. [2020-10-28 08:56:02,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 08:56:02,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:02,979 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:02,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:56:02,979 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:02,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:02,980 INFO L82 PathProgramCache]: Analyzing trace with hash -241904552, now seen corresponding path program 8 times [2020-10-28 08:56:02,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:02,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031541096] [2020-10-28 08:56:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:03,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:03,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:03,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:03,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:03,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:03,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:08,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 08:56:08,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:08,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 08:56:08,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:08,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:08,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:56:08,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:08,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:56:08,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:08,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:08,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:08,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:08,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:08,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:56:08,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:08,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:08,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:08,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:08,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:08,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-28 08:56:08,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031541096] [2020-10-28 08:56:08,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:08,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:56:08,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718012127] [2020-10-28 08:56:08,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:56:08,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:08,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:56:08,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:56:08,159 INFO L87 Difference]: Start difference. First operand 154 states and 163 transitions. Second operand 7 states. [2020-10-28 08:56:08,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:08,301 INFO L93 Difference]: Finished difference Result 298 states and 316 transitions. [2020-10-28 08:56:08,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:56:08,304 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 149 [2020-10-28 08:56:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:08,305 INFO L225 Difference]: With dead ends: 298 [2020-10-28 08:56:08,305 INFO L226 Difference]: Without dead ends: 157 [2020-10-28 08:56:08,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:56:08,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-28 08:56:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-28 08:56:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 08:56:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 165 transitions. [2020-10-28 08:56:08,318 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 165 transitions. Word has length 149 [2020-10-28 08:56:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:08,318 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 165 transitions. [2020-10-28 08:56:08,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:56:08,318 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 165 transitions. [2020-10-28 08:56:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 08:56:08,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:08,320 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:08,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:56:08,321 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:08,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:08,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1719732938, now seen corresponding path program 9 times [2020-10-28 08:56:08,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:08,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522631494] [2020-10-28 08:56:08,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:08,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:08,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:13,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:13,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 08:56:13,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:13,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 08:56:13,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:13,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:13,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:56:13,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 08:56:13,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:56:13,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:13,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:13,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:13,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:13,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:13,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:13,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:56:13,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:13,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:13,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:13,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:13,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:13,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2020-10-28 08:56:13,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522631494] [2020-10-28 08:56:13,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:13,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:56:13,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809694492] [2020-10-28 08:56:13,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:56:13,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:13,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:56:13,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:56:13,526 INFO L87 Difference]: Start difference. First operand 156 states and 165 transitions. Second operand 11 states. [2020-10-28 08:56:14,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:14,033 INFO L93 Difference]: Finished difference Result 305 states and 329 transitions. [2020-10-28 08:56:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:56:14,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 151 [2020-10-28 08:56:14,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:14,036 INFO L225 Difference]: With dead ends: 305 [2020-10-28 08:56:14,036 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 08:56:14,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:56:14,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 08:56:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2020-10-28 08:56:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-28 08:56:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 181 transitions. [2020-10-28 08:56:14,045 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 181 transitions. Word has length 151 [2020-10-28 08:56:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:14,045 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 181 transitions. [2020-10-28 08:56:14,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:56:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 181 transitions. [2020-10-28 08:56:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-28 08:56:14,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:14,048 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:14,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:56:14,048 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1266678490, now seen corresponding path program 10 times [2020-10-28 08:56:14,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:14,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834176952] [2020-10-28 08:56:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:14,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:14,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:14,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:14,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:14,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:15,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:19,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-28 08:56:19,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:19,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 08:56:19,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:19,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:19,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:56:19,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:19,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:56:19,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:19,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:19,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:19,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:19,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:19,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:19,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:19,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:19,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:19,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:19,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:19,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-28 08:56:19,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834176952] [2020-10-28 08:56:19,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:19,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:56:19,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939369728] [2020-10-28 08:56:19,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:56:19,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:19,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:56:19,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:56:19,215 INFO L87 Difference]: Start difference. First operand 172 states and 181 transitions. Second operand 8 states. [2020-10-28 08:56:19,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:19,363 INFO L93 Difference]: Finished difference Result 332 states and 350 transitions. [2020-10-28 08:56:19,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:56:19,364 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 167 [2020-10-28 08:56:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:19,365 INFO L225 Difference]: With dead ends: 332 [2020-10-28 08:56:19,365 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 08:56:19,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:56:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 08:56:19,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-10-28 08:56:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 08:56:19,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 183 transitions. [2020-10-28 08:56:19,373 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 183 transitions. Word has length 167 [2020-10-28 08:56:19,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:19,374 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 183 transitions. [2020-10-28 08:56:19,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:56:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 183 transitions. [2020-10-28 08:56:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-28 08:56:19,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:19,376 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:19,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:56:19,376 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:19,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1679627644, now seen corresponding path program 11 times [2020-10-28 08:56:19,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:19,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974843930] [2020-10-28 08:56:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:19,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:19,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:24,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:24,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 08:56:24,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:24,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 08:56:24,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:24,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:24,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:56:24,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 08:56:24,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:56:24,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:24,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:24,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:24,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:24,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:24,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:24,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:24,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:24,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:24,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:24,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:24,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:24,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-10-28 08:56:24,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974843930] [2020-10-28 08:56:24,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:24,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:56:24,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509601059] [2020-10-28 08:56:24,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:56:24,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:24,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:56:24,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:56:24,614 INFO L87 Difference]: Start difference. First operand 174 states and 183 transitions. Second operand 12 states. [2020-10-28 08:56:25,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:25,198 INFO L93 Difference]: Finished difference Result 337 states and 361 transitions. [2020-10-28 08:56:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:56:25,198 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 169 [2020-10-28 08:56:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:25,200 INFO L225 Difference]: With dead ends: 337 [2020-10-28 08:56:25,200 INFO L226 Difference]: Without dead ends: 198 [2020-10-28 08:56:25,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:56:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-28 08:56:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 190. [2020-10-28 08:56:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-28 08:56:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 199 transitions. [2020-10-28 08:56:25,209 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 199 transitions. Word has length 169 [2020-10-28 08:56:25,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:25,210 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 199 transitions. [2020-10-28 08:56:25,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:56:25,210 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 199 transitions. [2020-10-28 08:56:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-28 08:56:25,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:25,212 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:25,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:56:25,213 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:25,213 INFO L82 PathProgramCache]: Analyzing trace with hash -18194828, now seen corresponding path program 12 times [2020-10-28 08:56:25,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:25,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782275650] [2020-10-28 08:56:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:25,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:25,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:25,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:25,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:25,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:26,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:30,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:30,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-28 08:56:30,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:30,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-28 08:56:30,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:30,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:30,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:56:30,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:56:30,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:56:30,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:30,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:30,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:30,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:30,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:30,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:30,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:56:30,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:30,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:30,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:30,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:30,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:30,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2020-10-28 08:56:30,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782275650] [2020-10-28 08:56:30,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:30,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:56:30,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782626212] [2020-10-28 08:56:30,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:56:30,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:30,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:56:30,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:56:30,554 INFO L87 Difference]: Start difference. First operand 190 states and 199 transitions. Second operand 13 states. [2020-10-28 08:56:31,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:31,164 INFO L93 Difference]: Finished difference Result 367 states and 391 transitions. [2020-10-28 08:56:31,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:56:31,165 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 185 [2020-10-28 08:56:31,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:31,167 INFO L225 Difference]: With dead ends: 367 [2020-10-28 08:56:31,167 INFO L226 Difference]: Without dead ends: 214 [2020-10-28 08:56:31,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:56:31,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-28 08:56:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 206. [2020-10-28 08:56:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-28 08:56:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 215 transitions. [2020-10-28 08:56:31,177 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 215 transitions. Word has length 185 [2020-10-28 08:56:31,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:31,177 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 215 transitions. [2020-10-28 08:56:31,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:56:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 215 transitions. [2020-10-28 08:56:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-28 08:56:31,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:31,180 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:31,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:56:31,180 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:31,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:31,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1442493028, now seen corresponding path program 13 times [2020-10-28 08:56:31,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:31,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828493116] [2020-10-28 08:56:31,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:31,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:31,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:31,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:31,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:31,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:33,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:36,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:36,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-28 08:56:36,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:36,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 08:56:36,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:36,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:36,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:56:36,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:36,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:56:36,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:36,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:36,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:36,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:36,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:36,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:36,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:36,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:56:36,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:36,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:36,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:36,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:36,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:36,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-28 08:56:36,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828493116] [2020-10-28 08:56:36,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:36,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:56:36,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971282581] [2020-10-28 08:56:36,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:56:36,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:36,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:56:36,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:36,387 INFO L87 Difference]: Start difference. First operand 206 states and 215 transitions. Second operand 9 states. [2020-10-28 08:56:36,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:36,565 INFO L93 Difference]: Finished difference Result 398 states and 416 transitions. [2020-10-28 08:56:36,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:56:36,565 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 201 [2020-10-28 08:56:36,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:36,567 INFO L225 Difference]: With dead ends: 398 [2020-10-28 08:56:36,568 INFO L226 Difference]: Without dead ends: 209 [2020-10-28 08:56:36,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-28 08:56:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2020-10-28 08:56:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 08:56:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 217 transitions. [2020-10-28 08:56:36,578 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 217 transitions. Word has length 201 [2020-10-28 08:56:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:36,579 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 217 transitions. [2020-10-28 08:56:36,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:56:36,579 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 217 transitions. [2020-10-28 08:56:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-28 08:56:36,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:36,581 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:36,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:56:36,582 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:36,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:36,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1946501054, now seen corresponding path program 14 times [2020-10-28 08:56:36,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:36,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247398573] [2020-10-28 08:56:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:36,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:36,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:36,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:36,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:36,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:38,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:41,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:41,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-28 08:56:41,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:41,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-28 08:56:41,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:41,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:41,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:56:41,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:56:41,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:56:41,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:41,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:41,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:41,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:41,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:41,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:41,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:41,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:41,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:41,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:41,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:41,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:41,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2020-10-28 08:56:41,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247398573] [2020-10-28 08:56:41,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:41,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:56:41,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207712424] [2020-10-28 08:56:41,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:56:41,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:41,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:56:41,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:56:41,921 INFO L87 Difference]: Start difference. First operand 208 states and 217 transitions. Second operand 14 states. [2020-10-28 08:56:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:42,585 INFO L93 Difference]: Finished difference Result 399 states and 423 transitions. [2020-10-28 08:56:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:56:42,586 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 203 [2020-10-28 08:56:42,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:42,588 INFO L225 Difference]: With dead ends: 399 [2020-10-28 08:56:42,588 INFO L226 Difference]: Without dead ends: 232 [2020-10-28 08:56:42,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:56:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-28 08:56:42,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-10-28 08:56:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-28 08:56:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 233 transitions. [2020-10-28 08:56:42,612 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 233 transitions. Word has length 203 [2020-10-28 08:56:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:42,613 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 233 transitions. [2020-10-28 08:56:42,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:56:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 233 transitions. [2020-10-28 08:56:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-28 08:56:42,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:42,616 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:56:42,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:56:42,616 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1406633934, now seen corresponding path program 15 times [2020-10-28 08:56:42,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:42,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116129566] [2020-10-28 08:56:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:42,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:42,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:42,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:42,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:42,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:44,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:47,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-28 08:56:47,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:47,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-28 08:56:47,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:47,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:47,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:56:47,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:47,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:56:47,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:47,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:47,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:47,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:47,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:47,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:56:47,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:47,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:47,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:47,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:47,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:47,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-28 08:56:47,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116129566] [2020-10-28 08:56:47,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:47,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:56:47,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267375391] [2020-10-28 08:56:47,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:56:47,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:47,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:56:47,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:47,901 INFO L87 Difference]: Start difference. First operand 224 states and 233 transitions. Second operand 10 states. [2020-10-28 08:56:48,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:48,083 INFO L93 Difference]: Finished difference Result 432 states and 450 transitions. [2020-10-28 08:56:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:56:48,083 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 219 [2020-10-28 08:56:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:48,086 INFO L225 Difference]: With dead ends: 432 [2020-10-28 08:56:48,086 INFO L226 Difference]: Without dead ends: 227 [2020-10-28 08:56:48,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-28 08:56:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2020-10-28 08:56:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-28 08:56:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 235 transitions. [2020-10-28 08:56:48,104 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 235 transitions. Word has length 219 [2020-10-28 08:56:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:48,104 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 235 transitions. [2020-10-28 08:56:48,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:56:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 235 transitions. [2020-10-28 08:56:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-28 08:56:48,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:48,106 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 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 08:56:48,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:56:48,107 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:48,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1658849936, now seen corresponding path program 16 times [2020-10-28 08:56:48,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:48,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884049996] [2020-10-28 08:56:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:48,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:48,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:48,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:48,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:48,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:50,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:53,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:53,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 08:56:53,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:53,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5230 [2020-10-28 08:56:53,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:53,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:53,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:56:53,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-28 08:56:53,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:56:53,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:53,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:53,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:53,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:53,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:53,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:53,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:53,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:53,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:53,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:53,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:53,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:53,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 896 trivial. 0 not checked. [2020-10-28 08:56:53,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884049996] [2020-10-28 08:56:53,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:53,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:56:53,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462326660] [2020-10-28 08:56:53,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:56:53,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:53,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:56:53,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:56:53,638 INFO L87 Difference]: Start difference. First operand 226 states and 235 transitions. Second operand 15 states. [2020-10-28 08:56:54,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:54,349 INFO L93 Difference]: Finished difference Result 431 states and 455 transitions. [2020-10-28 08:56:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:56:54,350 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 221 [2020-10-28 08:56:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:54,352 INFO L225 Difference]: With dead ends: 431 [2020-10-28 08:56:54,352 INFO L226 Difference]: Without dead ends: 250 [2020-10-28 08:56:54,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:56:54,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-28 08:56:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 242. [2020-10-28 08:56:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-28 08:56:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 251 transitions. [2020-10-28 08:56:54,363 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 251 transitions. Word has length 221 [2020-10-28 08:56:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:54,364 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 251 transitions. [2020-10-28 08:56:54,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:56:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 251 transitions. [2020-10-28 08:56:54,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-28 08:56:54,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:54,365 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 7, 7, 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 08:56:54,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:56:54,365 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:54,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:54,366 INFO L82 PathProgramCache]: Analyzing trace with hash 495593088, now seen corresponding path program 17 times [2020-10-28 08:56:54,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:54,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992784260] [2020-10-28 08:56:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:54,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:54,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:54,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:54,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:54,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:59,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:59,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:59,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-28 08:56:59,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:56:59,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 08:56:59,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:59,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:59,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:56:59,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-28 08:56:59,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:56:59,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:59,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:59,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:59,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:59,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:59,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:59,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:59,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:59,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:59,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:59,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:59,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:59,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2020-10-28 08:56:59,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992784260] [2020-10-28 08:56:59,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:59,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:56:59,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303134487] [2020-10-28 08:56:59,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:56:59,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:59,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:56:59,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:56:59,698 INFO L87 Difference]: Start difference. First operand 242 states and 251 transitions. Second operand 16 states. [2020-10-28 08:57:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:00,475 INFO L93 Difference]: Finished difference Result 461 states and 485 transitions. [2020-10-28 08:57:00,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:57:00,476 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 237 [2020-10-28 08:57:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:00,478 INFO L225 Difference]: With dead ends: 461 [2020-10-28 08:57:00,479 INFO L226 Difference]: Without dead ends: 266 [2020-10-28 08:57:00,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:57:00,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-28 08:57:00,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 258. [2020-10-28 08:57:00,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-28 08:57:00,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 267 transitions. [2020-10-28 08:57:00,490 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 267 transitions. Word has length 237 [2020-10-28 08:57:00,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:00,490 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 267 transitions. [2020-10-28 08:57:00,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:57:00,490 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 267 transitions. [2020-10-28 08:57:00,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-28 08:57:00,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:00,492 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 7, 7, 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 08:57:00,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:57:00,492 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:00,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:00,493 INFO L82 PathProgramCache]: Analyzing trace with hash -609410448, now seen corresponding path program 18 times [2020-10-28 08:57:00,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:00,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894214102] [2020-10-28 08:57:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:00,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:00,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:00,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:00,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:00,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:06,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:06,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-28 08:57:06,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:06,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5467 [2020-10-28 08:57:06,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:06,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:06,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:57:06,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:06,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:57:06,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:06,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:06,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:06,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:06,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:06,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:06,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:06,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:06,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:06,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:06,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:06,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:06,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-28 08:57:06,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894214102] [2020-10-28 08:57:06,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:06,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:57:06,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888528311] [2020-10-28 08:57:06,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:57:06,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:06,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:57:06,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:57:06,150 INFO L87 Difference]: Start difference. First operand 258 states and 267 transitions. Second operand 11 states. [2020-10-28 08:57:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:06,343 INFO L93 Difference]: Finished difference Result 498 states and 516 transitions. [2020-10-28 08:57:06,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:57:06,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 253 [2020-10-28 08:57:06,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:06,345 INFO L225 Difference]: With dead ends: 498 [2020-10-28 08:57:06,345 INFO L226 Difference]: Without dead ends: 261 [2020-10-28 08:57:06,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:57:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-28 08:57:06,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2020-10-28 08:57:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-28 08:57:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 269 transitions. [2020-10-28 08:57:06,357 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 269 transitions. Word has length 253 [2020-10-28 08:57:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:06,357 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 269 transitions. [2020-10-28 08:57:06,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:57:06,357 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 269 transitions. [2020-10-28 08:57:06,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-28 08:57:06,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:06,373 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 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 08:57:06,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:57:06,374 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:06,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:06,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2053726898, now seen corresponding path program 19 times [2020-10-28 08:57:06,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:06,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097057438] [2020-10-28 08:57:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:06,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:06,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:06,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:06,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:06,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:06,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:11,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-28 08:57:11,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:57:11,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5176 [2020-10-28 08:57:11,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:11,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:11,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:57:11,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-28 08:57:11,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:57:11,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:11,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:11,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:11,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:11,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:11,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:11,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:11,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:11,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:11,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:11,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:11,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-28 08:57:11,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097057438] [2020-10-28 08:57:11,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:11,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:57:11,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25932767] [2020-10-28 08:57:11,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:57:11,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:11,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:57:11,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:57:11,913 INFO L87 Difference]: Start difference. First operand 260 states and 269 transitions. Second operand 17 states. [2020-10-28 08:57:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:12,627 INFO L93 Difference]: Finished difference Result 493 states and 517 transitions. [2020-10-28 08:57:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:57:12,627 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 255 [2020-10-28 08:57:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:12,629 INFO L225 Difference]: With dead ends: 493 [2020-10-28 08:57:12,629 INFO L226 Difference]: Without dead ends: 284 [2020-10-28 08:57:12,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:57:12,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-28 08:57:12,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 276. [2020-10-28 08:57:12,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-28 08:57:12,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 285 transitions. [2020-10-28 08:57:12,642 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 285 transitions. Word has length 255 [2020-10-28 08:57:12,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:12,643 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 285 transitions. [2020-10-28 08:57:12,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:57:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 285 transitions. [2020-10-28 08:57:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-28 08:57:12,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:12,645 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 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 08:57:12,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:57:12,645 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1446183618, now seen corresponding path program 20 times [2020-10-28 08:57:12,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:12,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160937966] [2020-10-28 08:57:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:12,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:12,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:12,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:12,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:12,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:17,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:17,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-28 08:57:17,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:17,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5242 [2020-10-28 08:57:17,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:17,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:17,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:57:17,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 08:57:17,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:57:17,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:18,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:18,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:18,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:18,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:18,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:18,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:18,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:18,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:18,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:18,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1632 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1436 trivial. 0 not checked. [2020-10-28 08:57:18,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160937966] [2020-10-28 08:57:18,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:18,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:57:18,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061071514] [2020-10-28 08:57:18,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:57:18,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:18,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:57:18,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:57:18,232 INFO L87 Difference]: Start difference. First operand 276 states and 285 transitions. Second operand 18 states. [2020-10-28 08:57:19,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:19,062 INFO L93 Difference]: Finished difference Result 523 states and 547 transitions. [2020-10-28 08:57:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:57:19,063 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 271 [2020-10-28 08:57:19,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:19,064 INFO L225 Difference]: With dead ends: 523 [2020-10-28 08:57:19,065 INFO L226 Difference]: Without dead ends: 300 [2020-10-28 08:57:19,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:57:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-28 08:57:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 292. [2020-10-28 08:57:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-28 08:57:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 301 transitions. [2020-10-28 08:57:19,077 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 301 transitions. Word has length 271 [2020-10-28 08:57:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:19,077 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 301 transitions. [2020-10-28 08:57:19,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:57:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 301 transitions. [2020-10-28 08:57:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-28 08:57:19,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:19,079 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 8, 8, 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 08:57:19,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:57:19,081 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:19,082 INFO L82 PathProgramCache]: Analyzing trace with hash -755745490, now seen corresponding path program 21 times [2020-10-28 08:57:19,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:19,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771854385] [2020-10-28 08:57:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:19,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:19,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:19,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:19,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:19,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:24,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:24,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-28 08:57:24,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:24,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5265 [2020-10-28 08:57:24,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:24,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:24,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:57:24,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:24,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:57:24,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:24,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:24,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:24,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:24,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:24,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:24,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:24,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:24,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:24,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:24,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:24,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:24,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-28 08:57:24,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771854385] [2020-10-28 08:57:24,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:24,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:57:24,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143764425] [2020-10-28 08:57:24,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:57:24,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:24,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:57:24,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:57:24,581 INFO L87 Difference]: Start difference. First operand 292 states and 301 transitions. Second operand 12 states. [2020-10-28 08:57:24,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:24,748 INFO L93 Difference]: Finished difference Result 564 states and 582 transitions. [2020-10-28 08:57:24,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:57:24,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 287 [2020-10-28 08:57:24,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:24,750 INFO L225 Difference]: With dead ends: 564 [2020-10-28 08:57:24,750 INFO L226 Difference]: Without dead ends: 295 [2020-10-28 08:57:24,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:57:24,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-28 08:57:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2020-10-28 08:57:24,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-28 08:57:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 303 transitions. [2020-10-28 08:57:24,763 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 303 transitions. Word has length 287 [2020-10-28 08:57:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:24,763 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 303 transitions. [2020-10-28 08:57:24,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:57:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 303 transitions. [2020-10-28 08:57:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-28 08:57:24,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:24,766 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 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 08:57:24,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:57:24,766 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:24,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:24,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1039499404, now seen corresponding path program 22 times [2020-10-28 08:57:24,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:24,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297805895] [2020-10-28 08:57:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:24,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:24,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:25,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:25,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:25,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:30,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:30,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-28 08:57:30,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:30,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5279 [2020-10-28 08:57:30,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:30,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:30,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:57:30,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 08:57:30,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:57:30,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:30,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:30,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:30,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:30,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:30,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:30,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:57:30,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:30,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:30,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:30,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1881 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2020-10-28 08:57:30,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297805895] [2020-10-28 08:57:30,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:30,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:57:30,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448752952] [2020-10-28 08:57:30,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:57:30,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:30,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:57:30,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:57:30,440 INFO L87 Difference]: Start difference. First operand 294 states and 303 transitions. Second operand 19 states. [2020-10-28 08:57:31,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:31,349 INFO L93 Difference]: Finished difference Result 555 states and 579 transitions. [2020-10-28 08:57:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:57:31,350 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 289 [2020-10-28 08:57:31,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:31,351 INFO L225 Difference]: With dead ends: 555 [2020-10-28 08:57:31,352 INFO L226 Difference]: Without dead ends: 318 [2020-10-28 08:57:31,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:57:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-28 08:57:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 310. [2020-10-28 08:57:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-28 08:57:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 319 transitions. [2020-10-28 08:57:31,367 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 319 transitions. Word has length 289 [2020-10-28 08:57:31,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:31,367 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 319 transitions. [2020-10-28 08:57:31,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:57:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 319 transitions. [2020-10-28 08:57:31,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-28 08:57:31,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:31,370 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 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 08:57:31,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:57:31,370 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:31,374 INFO L82 PathProgramCache]: Analyzing trace with hash -486071172, now seen corresponding path program 23 times [2020-10-28 08:57:31,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:31,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100362296] [2020-10-28 08:57:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:31,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:31,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:31,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:31,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:31,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:36,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:36,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-28 08:57:36,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:36,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5218 [2020-10-28 08:57:36,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:36,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:36,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:57:36,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:36,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:57:36,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:36,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:36,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:36,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:36,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:36,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:36,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:36,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:36,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:36,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:36,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:36,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:36,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2129 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-10-28 08:57:36,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100362296] [2020-10-28 08:57:36,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:36,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:57:36,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469336033] [2020-10-28 08:57:36,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:57:36,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:36,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:57:36,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:57:36,872 INFO L87 Difference]: Start difference. First operand 310 states and 319 transitions. Second operand 13 states. [2020-10-28 08:57:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:37,099 INFO L93 Difference]: Finished difference Result 598 states and 616 transitions. [2020-10-28 08:57:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:57:37,100 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 305 [2020-10-28 08:57:37,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:37,103 INFO L225 Difference]: With dead ends: 598 [2020-10-28 08:57:37,103 INFO L226 Difference]: Without dead ends: 313 [2020-10-28 08:57:37,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:57:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-28 08:57:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 312. [2020-10-28 08:57:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-28 08:57:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 321 transitions. [2020-10-28 08:57:37,117 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 321 transitions. Word has length 305 [2020-10-28 08:57:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:37,117 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 321 transitions. [2020-10-28 08:57:37,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:57:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 321 transitions. [2020-10-28 08:57:37,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-28 08:57:37,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:37,119 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 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 08:57:37,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:57:37,120 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:37,121 INFO L82 PathProgramCache]: Analyzing trace with hash 200117338, now seen corresponding path program 24 times [2020-10-28 08:57:37,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:37,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347111049] [2020-10-28 08:57:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:37,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:37,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:37,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:37,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:37,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:42,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:42,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-28 08:57:42,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:42,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-28 08:57:42,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:42,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:42,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:57:42,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:57:42,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:57:42,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:42,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:42,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:42,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:42,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:42,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:42,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:57:42,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:42,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:42,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:42,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:42,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:42,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:57:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2020-10-28 08:57:42,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347111049] [2020-10-28 08:57:42,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:42,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:57:42,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942451362] [2020-10-28 08:57:42,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:57:42,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:42,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:57:42,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:57:42,838 INFO L87 Difference]: Start difference. First operand 312 states and 321 transitions. Second operand 20 states. [2020-10-28 08:57:43,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:43,677 INFO L93 Difference]: Finished difference Result 587 states and 611 transitions. [2020-10-28 08:57:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:57:43,678 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 307 [2020-10-28 08:57:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:43,680 INFO L225 Difference]: With dead ends: 587 [2020-10-28 08:57:43,681 INFO L226 Difference]: Without dead ends: 336 [2020-10-28 08:57:43,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:57:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-28 08:57:43,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 328. [2020-10-28 08:57:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-28 08:57:43,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 337 transitions. [2020-10-28 08:57:43,715 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 337 transitions. Word has length 307 [2020-10-28 08:57:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:43,715 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 337 transitions. [2020-10-28 08:57:43,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:57:43,716 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 337 transitions. [2020-10-28 08:57:43,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-28 08:57:43,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:43,718 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 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 08:57:43,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:57:43,719 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:43,719 INFO L82 PathProgramCache]: Analyzing trace with hash 151557194, now seen corresponding path program 25 times [2020-10-28 08:57:43,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:43,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683859989] [2020-10-28 08:57:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:43,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:43,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:43,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:44,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:44,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:49,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:49,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 08:57:49,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:49,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5597 [2020-10-28 08:57:49,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:49,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:49,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:57:49,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 08:57:49,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:57:49,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:49,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:49,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:49,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:49,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:49,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:49,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:49,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:49,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:49,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:49,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:49,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:49,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2412 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2123 trivial. 0 not checked. [2020-10-28 08:57:49,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683859989] [2020-10-28 08:57:49,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:49,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:57:49,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679659483] [2020-10-28 08:57:49,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:57:49,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:49,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:57:49,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:57:49,795 INFO L87 Difference]: Start difference. First operand 328 states and 337 transitions. Second operand 21 states. [2020-10-28 08:57:50,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:50,785 INFO L93 Difference]: Finished difference Result 617 states and 641 transitions. [2020-10-28 08:57:50,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:57:50,785 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 323 [2020-10-28 08:57:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:50,787 INFO L225 Difference]: With dead ends: 617 [2020-10-28 08:57:50,788 INFO L226 Difference]: Without dead ends: 352 [2020-10-28 08:57:50,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:57:50,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-28 08:57:50,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2020-10-28 08:57:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-28 08:57:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 353 transitions. [2020-10-28 08:57:50,799 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 353 transitions. Word has length 323 [2020-10-28 08:57:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:50,800 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 353 transitions. [2020-10-28 08:57:50,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:57:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 353 transitions. [2020-10-28 08:57:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-28 08:57:50,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:50,802 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 10, 10, 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 08:57:50,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:57:50,802 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1836811206, now seen corresponding path program 26 times [2020-10-28 08:57:50,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:50,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599027850] [2020-10-28 08:57:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:50,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:51,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:51,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:51,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:51,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:56,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:56,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 349 [2020-10-28 08:57:56,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:56,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5907 [2020-10-28 08:57:56,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:56,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:56,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:57:56,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:56,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:57:56,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:56,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:56,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:56,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:56,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:56,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:56,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:57:56,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:56,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:56,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:56,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:56,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:56,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2692 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2020-10-28 08:57:57,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599027850] [2020-10-28 08:57:57,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:57,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:57:57,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615648852] [2020-10-28 08:57:57,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:57:57,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:57,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:57:57,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:57:57,143 INFO L87 Difference]: Start difference. First operand 344 states and 353 transitions. Second operand 14 states. [2020-10-28 08:57:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:57,423 INFO L93 Difference]: Finished difference Result 664 states and 682 transitions. [2020-10-28 08:57:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:57:57,424 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 339 [2020-10-28 08:57:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:57,427 INFO L225 Difference]: With dead ends: 664 [2020-10-28 08:57:57,427 INFO L226 Difference]: Without dead ends: 347 [2020-10-28 08:57:57,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:57:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-28 08:57:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 346. [2020-10-28 08:57:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-10-28 08:57:57,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 355 transitions. [2020-10-28 08:57:57,451 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 355 transitions. Word has length 339 [2020-10-28 08:57:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:57,451 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 355 transitions. [2020-10-28 08:57:57,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:57:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 355 transitions. [2020-10-28 08:57:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-28 08:57:57,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:57,454 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 11, 11, 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 08:57:57,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:57:57,454 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:57,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:57,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1728539800, now seen corresponding path program 27 times [2020-10-28 08:57:57,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:57,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016302531] [2020-10-28 08:57:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:57,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:57,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:57,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:57,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:58,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:02,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:02,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 351 [2020-10-28 08:58:02,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:02,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5172 [2020-10-28 08:58:02,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:02,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:02,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:58:02,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-28 08:58:02,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:58:02,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:03,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:03,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:03,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:03,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:03,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:03,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:03,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:03,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:03,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:03,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:03,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:03,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2713 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2389 trivial. 0 not checked. [2020-10-28 08:58:03,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016302531] [2020-10-28 08:58:03,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:03,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:58:03,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216599960] [2020-10-28 08:58:03,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:58:03,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:03,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:58:03,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:58:03,184 INFO L87 Difference]: Start difference. First operand 346 states and 355 transitions. Second operand 22 states. [2020-10-28 08:58:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:04,095 INFO L93 Difference]: Finished difference Result 649 states and 673 transitions. [2020-10-28 08:58:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:58:04,095 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 341 [2020-10-28 08:58:04,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:04,098 INFO L225 Difference]: With dead ends: 649 [2020-10-28 08:58:04,098 INFO L226 Difference]: Without dead ends: 370 [2020-10-28 08:58:04,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:58:04,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-28 08:58:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 362. [2020-10-28 08:58:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-10-28 08:58:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 371 transitions. [2020-10-28 08:58:04,110 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 371 transitions. Word has length 341 [2020-10-28 08:58:04,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:04,111 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 371 transitions. [2020-10-28 08:58:04,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:58:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 371 transitions. [2020-10-28 08:58:04,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-10-28 08:58:04,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:04,114 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 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 08:58:04,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:58:04,114 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:04,115 INFO L82 PathProgramCache]: Analyzing trace with hash -924600184, now seen corresponding path program 28 times [2020-10-28 08:58:04,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:04,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427140531] [2020-10-28 08:58:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:04,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:04,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:04,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:04,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:04,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:09,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:09,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 367 [2020-10-28 08:58:09,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:09,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5350 [2020-10-28 08:58:09,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:09,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:09,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:58:09,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:09,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:58:09,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:09,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:09,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:09,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:09,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:09,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:09,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:09,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:09,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:09,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:09,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:09,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:09,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2020-10-28 08:58:09,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427140531] [2020-10-28 08:58:09,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:09,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:58:09,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152635596] [2020-10-28 08:58:09,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:58:09,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:09,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:58:09,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:58:09,885 INFO L87 Difference]: Start difference. First operand 362 states and 371 transitions. Second operand 15 states. [2020-10-28 08:58:10,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:10,098 INFO L93 Difference]: Finished difference Result 698 states and 716 transitions. [2020-10-28 08:58:10,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:58:10,098 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 357 [2020-10-28 08:58:10,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:10,101 INFO L225 Difference]: With dead ends: 698 [2020-10-28 08:58:10,101 INFO L226 Difference]: Without dead ends: 365 [2020-10-28 08:58:10,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:58:10,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-28 08:58:10,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 364. [2020-10-28 08:58:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-28 08:58:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 373 transitions. [2020-10-28 08:58:10,122 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 373 transitions. Word has length 357 [2020-10-28 08:58:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:10,122 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 373 transitions. [2020-10-28 08:58:10,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:58:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 373 transitions. [2020-10-28 08:58:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-10-28 08:58:10,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:10,125 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 12, 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 08:58:10,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:58:10,126 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:10,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:10,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2128966298, now seen corresponding path program 29 times [2020-10-28 08:58:10,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:10,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522687164] [2020-10-28 08:58:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:10,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:10,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:10,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:10,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:10,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:15,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:15,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 369 [2020-10-28 08:58:15,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:15,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5463 [2020-10-28 08:58:15,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:15,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:15,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:58:15,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:58:15,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:58:15,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:16,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:16,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:16,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:16,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:16,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:16,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:16,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:16,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:16,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:16,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:16,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:16,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3032 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2671 trivial. 0 not checked. [2020-10-28 08:58:16,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522687164] [2020-10-28 08:58:16,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:16,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:58:16,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075974279] [2020-10-28 08:58:16,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:58:16,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:16,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:58:16,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:58:16,157 INFO L87 Difference]: Start difference. First operand 364 states and 373 transitions. Second operand 23 states. [2020-10-28 08:58:17,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:17,192 INFO L93 Difference]: Finished difference Result 681 states and 705 transitions. [2020-10-28 08:58:17,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:58:17,193 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 359 [2020-10-28 08:58:17,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:17,195 INFO L225 Difference]: With dead ends: 681 [2020-10-28 08:58:17,195 INFO L226 Difference]: Without dead ends: 388 [2020-10-28 08:58:17,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:58:17,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-28 08:58:17,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 380. [2020-10-28 08:58:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-10-28 08:58:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 389 transitions. [2020-10-28 08:58:17,207 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 389 transitions. Word has length 359 [2020-10-28 08:58:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:17,207 INFO L481 AbstractCegarLoop]: Abstraction has 380 states and 389 transitions. [2020-10-28 08:58:17,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:58:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 389 transitions. [2020-10-28 08:58:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-10-28 08:58:17,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:17,210 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 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 08:58:17,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:58:17,211 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash 32914774, now seen corresponding path program 30 times [2020-10-28 08:58:17,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:17,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112950227] [2020-10-28 08:58:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:17,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:17,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:17,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:17,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:17,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:23,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:23,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-28 08:58:23,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:23,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5826 [2020-10-28 08:58:23,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:23,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:58:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-28 08:58:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:58:23,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:23,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:23,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:23,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:23,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:23,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:23,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:23,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:23,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:23,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:23,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:23,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:23,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3344 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2944 trivial. 0 not checked. [2020-10-28 08:58:23,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112950227] [2020-10-28 08:58:23,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:23,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:58:23,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522267787] [2020-10-28 08:58:23,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:58:23,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:23,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:58:23,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:58:23,643 INFO L87 Difference]: Start difference. First operand 380 states and 389 transitions. Second operand 24 states. [2020-10-28 08:58:24,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:24,891 INFO L93 Difference]: Finished difference Result 711 states and 735 transitions. [2020-10-28 08:58:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:58:24,891 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 375 [2020-10-28 08:58:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:24,894 INFO L225 Difference]: With dead ends: 711 [2020-10-28 08:58:24,895 INFO L226 Difference]: Without dead ends: 404 [2020-10-28 08:58:24,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:58:24,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-28 08:58:24,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 396. [2020-10-28 08:58:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2020-10-28 08:58:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 405 transitions. [2020-10-28 08:58:24,907 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 405 transitions. Word has length 375 [2020-10-28 08:58:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:24,907 INFO L481 AbstractCegarLoop]: Abstraction has 396 states and 405 transitions. [2020-10-28 08:58:24,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:58:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 405 transitions. [2020-10-28 08:58:24,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-28 08:58:24,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:24,911 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 12, 12, 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 08:58:24,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:58:24,911 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:24,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2103259834, now seen corresponding path program 31 times [2020-10-28 08:58:24,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:24,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691784332] [2020-10-28 08:58:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:25,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:25,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:25,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:25,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:25,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:30,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:30,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 401 [2020-10-28 08:58:30,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:30,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5436 [2020-10-28 08:58:30,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:30,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:30,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:58:30,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:30,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:58:30,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:30,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:30,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:30,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:30,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:30,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:30,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:30,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:30,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:30,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:30,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:30,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:30,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3672 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2020-10-28 08:58:30,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691784332] [2020-10-28 08:58:30,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:30,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:58:30,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838487291] [2020-10-28 08:58:30,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:58:30,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:30,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:58:30,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:58:30,747 INFO L87 Difference]: Start difference. First operand 396 states and 405 transitions. Second operand 16 states. [2020-10-28 08:58:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:30,929 INFO L93 Difference]: Finished difference Result 764 states and 782 transitions. [2020-10-28 08:58:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:58:30,930 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 391 [2020-10-28 08:58:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:30,932 INFO L225 Difference]: With dead ends: 764 [2020-10-28 08:58:30,933 INFO L226 Difference]: Without dead ends: 399 [2020-10-28 08:58:30,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:58:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-10-28 08:58:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 398. [2020-10-28 08:58:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2020-10-28 08:58:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 407 transitions. [2020-10-28 08:58:30,946 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 407 transitions. Word has length 391 [2020-10-28 08:58:30,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:30,946 INFO L481 AbstractCegarLoop]: Abstraction has 398 states and 407 transitions. [2020-10-28 08:58:30,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:58:30,946 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 407 transitions. [2020-10-28 08:58:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-28 08:58:30,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:30,949 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 13, 13, 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 08:58:30,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:58:30,949 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:30,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:30,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1545267876, now seen corresponding path program 32 times [2020-10-28 08:58:30,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:30,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844164233] [2020-10-28 08:58:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:31,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:31,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:31,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:31,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:31,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:36,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:36,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 403 [2020-10-28 08:58:36,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:36,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5736 [2020-10-28 08:58:36,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:36,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:36,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:58:36,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-28 08:58:36,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:58:36,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:37,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:37,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:37,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:37,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:37,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:37,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:37,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:37,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:37,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:37,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:37,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:37,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3697 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3256 trivial. 0 not checked. [2020-10-28 08:58:37,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844164233] [2020-10-28 08:58:37,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:37,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:58:37,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856408703] [2020-10-28 08:58:37,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:58:37,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:37,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:58:37,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:58:37,340 INFO L87 Difference]: Start difference. First operand 398 states and 407 transitions. Second operand 25 states. [2020-10-28 08:58:38,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:38,547 INFO L93 Difference]: Finished difference Result 743 states and 767 transitions. [2020-10-28 08:58:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:58:38,548 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 393 [2020-10-28 08:58:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:38,550 INFO L225 Difference]: With dead ends: 743 [2020-10-28 08:58:38,550 INFO L226 Difference]: Without dead ends: 422 [2020-10-28 08:58:38,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:58:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-28 08:58:38,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 414. [2020-10-28 08:58:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-28 08:58:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 423 transitions. [2020-10-28 08:58:38,563 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 423 transitions. Word has length 393 [2020-10-28 08:58:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:38,564 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 423 transitions. [2020-10-28 08:58:38,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:58:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 423 transitions. [2020-10-28 08:58:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-10-28 08:58:38,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:38,567 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 13, 13, 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 08:58:38,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:58:38,567 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:38,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:38,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1499603308, now seen corresponding path program 33 times [2020-10-28 08:58:38,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:38,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665173841] [2020-10-28 08:58:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:38,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:38,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:38,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:38,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:39,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:39,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking...