/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_06.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:34:12,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:34:12,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:34:12,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:34:12,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:34:12,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:34:12,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:34:12,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:34:12,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:34:12,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:34:12,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:34:12,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:34:12,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:34:12,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:34:12,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:34:12,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:34:12,410 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:34:12,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:34:12,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:34:12,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:34:12,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:34:12,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:34:12,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:34:12,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:34:12,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:34:12,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:34:12,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:34:12,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:34:12,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:34:12,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:34:12,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:34:12,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:34:12,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:34:12,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:34:12,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:34:12,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:34:12,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:34:12,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:34:12,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:34:12,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:34:12,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:34:12,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:34:12,511 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:34:12,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:34:12,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:34:12,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:34:12,517 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:34:12,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:34:12,517 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:34:12,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:34:12,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:34:12,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:34:12,519 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:34:12,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:34:12,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:34:12,520 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:34:12,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:34:12,520 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:34:12,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:34:12,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:34:12,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:34:12,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:34:12,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:34:12,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:34:12,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:34:12,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:34:12,522 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:34:12,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:34:12,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:34:12,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:34:12,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:34:12,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:34:12,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:34:13,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:34:13,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:34:13,013 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:34:13,014 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:34:13,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_06.i [2020-10-27 14:34:13,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c8112c90/d59f642ffb724b5097fc1c3e3a122c3e/FLAGab590ec9c [2020-10-27 14:34:13,779 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:34:13,780 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_two_index_06.i [2020-10-27 14:34:13,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c8112c90/d59f642ffb724b5097fc1c3e3a122c3e/FLAGab590ec9c [2020-10-27 14:34:14,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c8112c90/d59f642ffb724b5097fc1c3e3a122c3e [2020-10-27 14:34:14,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:34:14,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:34:14,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:34:14,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:34:14,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:34:14,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:34:14" (1/1) ... [2020-10-27 14:34:14,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cab4213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:14, skipping insertion in model container [2020-10-27 14:34:14,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:34:14" (1/1) ... [2020-10-27 14:34:14,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:34:14,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:34:14,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:34:14,348 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:34:14,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:34:14,390 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:34:14,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:14 WrapperNode [2020-10-27 14:34:14,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:34:14,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:34:14,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:34:14,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:34:14,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:14" (1/1) ... [2020-10-27 14:34:14,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:14" (1/1) ... [2020-10-27 14:34:14,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:14" (1/1) ... [2020-10-27 14:34:14,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:14" (1/1) ... [2020-10-27 14:34:14,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:14" (1/1) ... [2020-10-27 14:34:14,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:14" (1/1) ... [2020-10-27 14:34:14,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:14" (1/1) ... [2020-10-27 14:34:14,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:34:14,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:34:14,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:34:14,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:34:14,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:34:14,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:34:14,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:34:14,516 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:34:14,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:34:14,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:34:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:34:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:34:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:34:14,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:34:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:34:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:34:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:34:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:34:14,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:34:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:34:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:34:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:34:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:34:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:34:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:34:14,951 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:34:14,952 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:34:14,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:34:14 BoogieIcfgContainer [2020-10-27 14:34:14,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:34:14,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:34:14,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:34:14,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:34:14,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:34:14" (1/3) ... [2020-10-27 14:34:14,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aaeefd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:34:14, skipping insertion in model container [2020-10-27 14:34:14,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:34:14" (2/3) ... [2020-10-27 14:34:14,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aaeefd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:34:14, skipping insertion in model container [2020-10-27 14:34:14,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:34:14" (3/3) ... [2020-10-27 14:34:14,981 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_06.i [2020-10-27 14:34:14,996 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:34:15,001 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:34:15,017 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:34:15,062 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:34:15,062 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:34:15,062 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:34:15,063 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:34:15,063 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:34:15,063 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:34:15,063 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:34:15,063 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:34:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-27 14:34:15,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:34:15,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:15,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:15,098 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:15,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:15,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1774182118, now seen corresponding path program 1 times [2020-10-27 14:34:15,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:15,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286900865] [2020-10-27 14:34:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:15,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:15,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:15,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:15,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:34:15,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:34:15,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-27 14:34:15,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:15,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:15,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:34:15,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:15,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 14:34:15,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:15,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:15,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:15,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:15,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:15,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:34:15,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:15,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:15,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:15,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:15,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:34:15,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286900865] [2020-10-27 14:34:15,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:34:15,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:34:15,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027500578] [2020-10-27 14:34:15,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:34:15,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:15,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:34:15,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:34:15,780 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-27 14:34:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:15,866 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-10-27 14:34:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:34:15,868 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-27 14:34:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:15,877 INFO L225 Difference]: With dead ends: 48 [2020-10-27 14:34:15,877 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 14:34:15,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:34:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 14:34:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 14:34:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 14:34:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-27 14:34:15,924 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-10-27 14:34:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:15,925 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-27 14:34:15,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:34:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-27 14:34:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 14:34:15,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:15,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:15,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:34:15,927 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:15,928 INFO L82 PathProgramCache]: Analyzing trace with hash 414065378, now seen corresponding path program 1 times [2020-10-27 14:34:15,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:15,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049687418] [2020-10-27 14:34:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:15,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:15,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:16,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:16,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 14:34:16,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:34:16,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-27 14:34:16,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:16,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:34:16,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:34:16,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:34:16,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:16,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:16,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:16,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:16,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:16,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:16,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:34:16,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:16,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:16,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:16,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:16,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:34:16,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049687418] [2020-10-27 14:34:16,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:34:16,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:34:16,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093059959] [2020-10-27 14:34:16,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:34:16,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:16,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:34:16,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:34:16,280 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-10-27 14:34:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:16,365 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-27 14:34:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:34:16,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 14:34:16,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:16,368 INFO L225 Difference]: With dead ends: 40 [2020-10-27 14:34:16,369 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 14:34:16,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:34:16,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 14:34:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-27 14:34:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 14:34:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-27 14:34:16,382 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2020-10-27 14:34:16,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:16,382 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-27 14:34:16,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:34:16,382 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-27 14:34:16,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 14:34:16,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:16,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:16,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:34:16,384 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1170351871, now seen corresponding path program 1 times [2020-10-27 14:34:16,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:16,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356448976] [2020-10-27 14:34:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:16,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:16,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:16,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:17,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:17,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 14:34:17,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:17,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 709 [2020-10-27 14:34:17,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:17,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:34:17,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:34:17,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:34:17,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:17,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:17,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:17,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:17,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:17,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:17,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:34:17,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:17,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:17,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:17,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:17,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:34:17,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356448976] [2020-10-27 14:34:17,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:17,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:34:17,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851845779] [2020-10-27 14:34:17,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:34:17,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:17,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:34:17,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:34:17,179 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-27 14:34:17,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:17,294 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-27 14:34:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:34:17,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-27 14:34:17,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:17,296 INFO L225 Difference]: With dead ends: 46 [2020-10-27 14:34:17,296 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 14:34:17,297 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 [2020-10-27 14:34:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 14:34:17,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2020-10-27 14:34:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 14:34:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 14:34:17,305 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2020-10-27 14:34:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:17,306 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 14:34:17,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:34:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 14:34:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:34:17,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:17,307 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:17,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:34:17,308 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:17,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1420739774, now seen corresponding path program 2 times [2020-10-27 14:34:17,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:17,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922873039] [2020-10-27 14:34:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:17,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:17,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:17,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:18,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:18,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 14:34:18,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:18,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 694 [2020-10-27 14:34:18,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:18,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:34:18,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:34:18,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:34:18,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:18,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:18,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:18,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:18,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:18,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:18,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:18,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:18,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:18,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:18,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:18,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 14:34:18,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922873039] [2020-10-27 14:34:18,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:18,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:34:18,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157715525] [2020-10-27 14:34:18,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:34:18,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:18,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:34:18,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:34:18,096 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-27 14:34:18,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:18,206 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-27 14:34:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:34:18,206 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 14:34:18,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:18,207 INFO L225 Difference]: With dead ends: 52 [2020-10-27 14:34:18,208 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 14:34:18,208 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 [2020-10-27 14:34:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 14:34:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2020-10-27 14:34:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 14:34:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-27 14:34:18,216 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-27 14:34:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:18,217 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-27 14:34:18,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:34:18,217 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-27 14:34:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:34:18,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:18,218 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:18,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:34:18,218 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:18,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:18,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1013754463, now seen corresponding path program 3 times [2020-10-27 14:34:18,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:18,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553548214] [2020-10-27 14:34:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:18,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:18,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:18,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:19,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:19,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:34:19,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:19,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1406 [2020-10-27 14:34:19,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:19,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:34:19,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 14:34:19,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:34:19,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:19,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:19,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:19,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:19,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:19,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:19,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:34:19,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:19,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:19,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:19,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:19,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:34:19,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553548214] [2020-10-27 14:34:19,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:19,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:34:19,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790629988] [2020-10-27 14:34:19,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:34:19,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:19,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:34:19,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:34:19,740 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-10-27 14:34:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:19,900 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-10-27 14:34:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:34:19,901 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-27 14:34:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:19,902 INFO L225 Difference]: With dead ends: 58 [2020-10-27 14:34:19,902 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:34:19,903 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 [2020-10-27 14:34:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:34:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-10-27 14:34:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:34:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 14:34:19,910 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2020-10-27 14:34:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:19,910 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 14:34:19,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:34:19,911 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 14:34:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 14:34:19,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:19,912 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:19,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:34:19,912 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:19,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2063426654, now seen corresponding path program 4 times [2020-10-27 14:34:19,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:19,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665817435] [2020-10-27 14:34:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:19,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:19,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:20,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:21,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:21,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 14:34:21,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:21,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1663 [2020-10-27 14:34:21,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:21,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:34:21,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:34:21,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:34:21,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:21,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:21,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:21,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:21,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:21,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:21,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:21,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:21,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:21,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:21,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:21,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 14:34:21,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665817435] [2020-10-27 14:34:21,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:21,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:34:21,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416029055] [2020-10-27 14:34:21,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:34:21,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:21,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:34:21,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:34:21,674 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2020-10-27 14:34:21,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:21,807 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-27 14:34:21,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:34:21,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-27 14:34:21,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:21,809 INFO L225 Difference]: With dead ends: 64 [2020-10-27 14:34:21,809 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:34:21,810 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 [2020-10-27 14:34:21,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:34:21,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-27 14:34:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 14:34:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-27 14:34:21,817 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2020-10-27 14:34:21,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:21,817 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-27 14:34:21,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:34:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-27 14:34:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:34:21,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:21,819 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:21,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:34:21,819 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:21,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:21,820 INFO L82 PathProgramCache]: Analyzing trace with hash 532089409, now seen corresponding path program 5 times [2020-10-27 14:34:21,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:21,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680153055] [2020-10-27 14:34:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:21,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:21,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:22,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:24,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:24,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:34:24,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:24,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2600 [2020-10-27 14:34:24,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:24,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:34:24,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 14:34:24,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:34:24,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:24,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:24,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:24,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:24,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:24,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:24,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:24,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:24,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:24,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:24,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:24,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:34:24,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680153055] [2020-10-27 14:34:24,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:24,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:34:24,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735343510] [2020-10-27 14:34:24,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:34:24,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:24,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:34:24,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:34:24,533 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 9 states. [2020-10-27 14:34:24,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:24,719 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-27 14:34:24,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:34:24,720 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 14:34:24,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:24,721 INFO L225 Difference]: With dead ends: 70 [2020-10-27 14:34:24,721 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 14:34:24,722 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 [2020-10-27 14:34:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 14:34:24,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2020-10-27 14:34:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:34:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-27 14:34:24,738 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2020-10-27 14:34:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:24,738 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-27 14:34:24,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:34:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-27 14:34:24,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:34:24,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:24,739 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:24,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:34:24,740 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:24,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1725973506, now seen corresponding path program 6 times [2020-10-27 14:34:24,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:24,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816533458] [2020-10-27 14:34:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:24,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:24,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:25,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:27,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:27,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:34:27,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:27,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2893 [2020-10-27 14:34:27,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:27,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:34:27,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:34:27,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:34:27,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:27,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:27,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:27,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:27,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:27,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:27,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:34:27,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:27,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:27,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-27 14:34:27,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816533458] [2020-10-27 14:34:27,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:27,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:34:27,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479471321] [2020-10-27 14:34:27,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:34:27,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:27,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:34:27,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:34:27,773 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2020-10-27 14:34:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:27,979 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-27 14:34:27,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:34:27,979 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-27 14:34:27,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:27,981 INFO L225 Difference]: With dead ends: 76 [2020-10-27 14:34:27,981 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:34:27,982 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 [2020-10-27 14:34:27,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:34:27,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2020-10-27 14:34:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 14:34:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-27 14:34:27,995 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2020-10-27 14:34:27,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:27,996 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-27 14:34:27,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:34:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-27 14:34:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:34:27,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:27,999 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:27,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:34:27,999 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:28,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:28,000 INFO L82 PathProgramCache]: Analyzing trace with hash -74778911, now seen corresponding path program 7 times [2020-10-27 14:34:28,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:28,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781628555] [2020-10-27 14:34:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:28,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:28,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:28,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:31,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:31,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:34:31,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:31,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3935 [2020-10-27 14:34:31,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:31,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:34:31,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 14:34:31,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:34:31,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:32,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:32,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:32,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:32,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:32,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:32,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:34:32,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:32,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:32,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:32,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:32,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 14:34:32,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781628555] [2020-10-27 14:34:32,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:32,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:34:32,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002174632] [2020-10-27 14:34:32,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:34:32,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:32,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:34:32,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:34:32,080 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2020-10-27 14:34:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:32,291 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2020-10-27 14:34:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:34:32,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-27 14:34:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:32,292 INFO L225 Difference]: With dead ends: 82 [2020-10-27 14:34:32,293 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 14:34:32,294 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 [2020-10-27 14:34:32,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 14:34:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 37. [2020-10-27 14:34:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 14:34:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-27 14:34:32,307 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2020-10-27 14:34:32,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:32,307 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-27 14:34:32,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:34:32,307 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-27 14:34:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:34:32,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:32,309 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:32,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:34:32,309 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:32,310 INFO L82 PathProgramCache]: Analyzing trace with hash -91736990, now seen corresponding path program 8 times [2020-10-27 14:34:32,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:32,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970568606] [2020-10-27 14:34:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:32,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:32,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:32,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:37,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:37,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:34:37,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:37,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4765 [2020-10-27 14:34:37,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:37,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:34:37,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:34:37,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:34:37,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:37,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:37,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:37,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:37,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:37,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:37,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:37,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:37,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:37,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:37,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:37,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:34:37,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970568606] [2020-10-27 14:34:37,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:37,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:34:37,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848558957] [2020-10-27 14:34:37,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:34:37,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:37,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:34:37,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:34:37,233 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 12 states. [2020-10-27 14:34:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:37,455 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-27 14:34:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:34:37,456 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-27 14:34:37,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:37,457 INFO L225 Difference]: With dead ends: 88 [2020-10-27 14:34:37,457 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:34:37,458 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 [2020-10-27 14:34:37,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:34:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 39. [2020-10-27 14:34:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:34:37,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-27 14:34:37,472 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2020-10-27 14:34:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:37,472 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-27 14:34:37,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:34:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-27 14:34:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 14:34:37,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:37,477 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:37,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:34:37,477 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:37,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1955521663, now seen corresponding path program 9 times [2020-10-27 14:34:37,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:37,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030089503] [2020-10-27 14:34:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:37,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:37,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:37,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:42,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:42,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 14:34:42,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:42,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 14:34:42,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:42,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:34:42,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:34:42,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:34:42,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:42,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:42,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:42,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:42,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:42,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:42,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:42,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:42,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:42,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:42,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:42,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 14:34:42,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030089503] [2020-10-27 14:34:42,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:42,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:34:42,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66859777] [2020-10-27 14:34:42,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:34:42,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:42,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:34:42,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:34:42,681 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 13 states. [2020-10-27 14:34:42,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:42,991 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2020-10-27 14:34:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:34:42,991 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-10-27 14:34:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:42,992 INFO L225 Difference]: With dead ends: 94 [2020-10-27 14:34:42,993 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:34:42,993 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 [2020-10-27 14:34:42,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:34:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2020-10-27 14:34:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:34:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-27 14:34:43,001 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2020-10-27 14:34:43,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:43,001 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-27 14:34:43,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:34:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-27 14:34:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 14:34:43,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:43,002 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:43,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:34:43,003 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:43,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1307022142, now seen corresponding path program 10 times [2020-10-27 14:34:43,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:43,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446212861] [2020-10-27 14:34:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:43,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:43,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:43,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:48,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:48,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 14:34:48,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:48,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:34:48,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:48,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:34:48,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:34:48,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:34:48,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:48,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:48,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:48,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:48,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:48,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:48,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:34:48,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:48,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:48,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:48,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:48,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 14:34:48,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446212861] [2020-10-27 14:34:48,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:48,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:34:48,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764627303] [2020-10-27 14:34:48,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:34:48,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:48,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:34:48,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:34:48,227 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 14 states. [2020-10-27 14:34:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:48,552 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2020-10-27 14:34:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:34:48,553 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-27 14:34:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:48,555 INFO L225 Difference]: With dead ends: 100 [2020-10-27 14:34:48,555 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:34:48,556 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 [2020-10-27 14:34:48,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:34:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2020-10-27 14:34:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:34:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-27 14:34:48,565 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 37 [2020-10-27 14:34:48,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:48,565 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-27 14:34:48,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:34:48,565 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-27 14:34:48,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:34:48,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:48,566 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:48,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:34:48,566 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:48,567 INFO L82 PathProgramCache]: Analyzing trace with hash 726366241, now seen corresponding path program 11 times [2020-10-27 14:34:48,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:48,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782524008] [2020-10-27 14:34:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:48,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:48,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:48,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:53,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:53,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:34:53,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:53,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:34:53,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:34:53,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 14:34:53,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 14:34:53,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:53,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:53,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:53,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:53,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:53,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:53,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 14:34:53,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:53,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:53,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:53,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:53,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-27 14:34:53,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782524008] [2020-10-27 14:34:53,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:53,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:34:53,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397788609] [2020-10-27 14:34:53,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:34:53,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:53,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:34:53,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:34:53,815 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 15 states. [2020-10-27 14:34:54,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:54,161 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2020-10-27 14:34:54,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:34:54,161 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-27 14:34:54,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:54,162 INFO L225 Difference]: With dead ends: 106 [2020-10-27 14:34:54,162 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 14:34:54,164 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 [2020-10-27 14:34:54,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 14:34:54,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 45. [2020-10-27 14:34:54,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 14:34:54,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-27 14:34:54,183 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2020-10-27 14:34:54,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:54,184 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-27 14:34:54,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:34:54,184 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-27 14:34:54,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 14:34:54,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:54,185 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:54,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:34:54,185 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1473319646, now seen corresponding path program 12 times [2020-10-27 14:34:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:54,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399009947] [2020-10-27 14:34:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:54,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:54,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:54,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:59,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:59,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:34:59,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:34:59,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:34:59,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:34:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:34:59,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:34:59,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:59,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:34:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:59,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:59,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:34:59,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:34:59,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:34:59,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:34:59,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:34:59,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:34:59,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:34:59,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:34:59,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:34:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-27 14:34:59,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399009947] [2020-10-27 14:34:59,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:34:59,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:34:59,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245185240] [2020-10-27 14:34:59,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:34:59,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:34:59,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:34:59,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:34:59,461 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 16 states. [2020-10-27 14:34:59,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:34:59,827 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2020-10-27 14:34:59,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:34:59,828 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 41 [2020-10-27 14:34:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:34:59,829 INFO L225 Difference]: With dead ends: 112 [2020-10-27 14:34:59,829 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 14:34:59,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:34:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 14:34:59,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 47. [2020-10-27 14:34:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:34:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-27 14:34:59,838 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 41 [2020-10-27 14:34:59,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:34:59,839 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-27 14:34:59,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:34:59,839 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-27 14:34:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:34:59,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:34:59,840 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:34:59,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:34:59,840 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:34:59,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:34:59,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2122058945, now seen corresponding path program 13 times [2020-10-27 14:34:59,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:34:59,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241165402] [2020-10-27 14:34:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:34:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:34:59,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:34:59,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:00,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:04,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:04,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:35:04,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:04,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:35:04,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:04,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:35:04,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:35:04,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:35:04,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:05,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:05,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:05,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:05,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:05,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:05,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:35:05,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:05,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:05,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:05,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:05,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-27 14:35:05,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241165402] [2020-10-27 14:35:05,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:05,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:35:05,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901929744] [2020-10-27 14:35:05,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:35:05,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:05,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:35:05,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:35:05,115 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2020-10-27 14:35:05,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:05,469 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2020-10-27 14:35:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:35:05,469 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-27 14:35:05,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:05,471 INFO L225 Difference]: With dead ends: 118 [2020-10-27 14:35:05,471 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 14:35:05,472 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 [2020-10-27 14:35:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 14:35:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 49. [2020-10-27 14:35:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:35:05,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-27 14:35:05,480 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 43 [2020-10-27 14:35:05,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:05,480 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-27 14:35:05,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:35:05,480 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-27 14:35:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:35:05,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:05,481 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:05,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:35:05,481 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:05,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:05,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2146022786, now seen corresponding path program 14 times [2020-10-27 14:35:05,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:05,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145405589] [2020-10-27 14:35:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:05,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:05,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:06,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:10,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:10,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:35:10,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:10,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:35:10,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:10,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:35:10,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:35:10,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:35:10,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:10,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:10,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:10,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:10,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:10,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:10,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:35:10,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:10,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:10,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:10,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:10,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-27 14:35:10,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145405589] [2020-10-27 14:35:10,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:10,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:35:10,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825860596] [2020-10-27 14:35:10,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:35:10,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:10,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:35:10,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:35:10,783 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 18 states. [2020-10-27 14:35:11,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:11,262 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2020-10-27 14:35:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:35:11,262 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 14:35:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:11,263 INFO L225 Difference]: With dead ends: 124 [2020-10-27 14:35:11,263 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 14:35:11,266 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 [2020-10-27 14:35:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 14:35:11,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 51. [2020-10-27 14:35:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:35:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-27 14:35:11,274 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 45 [2020-10-27 14:35:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:11,274 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-27 14:35:11,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:35:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-27 14:35:11,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:35:11,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:11,275 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:11,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:35:11,276 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:11,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:11,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1880827551, now seen corresponding path program 15 times [2020-10-27 14:35:11,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:11,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417373441] [2020-10-27 14:35:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:11,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:11,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:12,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:16,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:16,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:35:16,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:16,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:35:16,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:16,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:35:16,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:35:16,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:35:16,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:16,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:16,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:16,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:16,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:16,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:16,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:16,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:16,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:16,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:16,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:16,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-27 14:35:16,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417373441] [2020-10-27 14:35:16,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:16,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:35:16,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609885954] [2020-10-27 14:35:16,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:35:16,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:16,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:35:16,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:35:16,598 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 19 states. [2020-10-27 14:35:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:17,025 INFO L93 Difference]: Finished difference Result 130 states and 151 transitions. [2020-10-27 14:35:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:35:17,026 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-27 14:35:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:17,028 INFO L225 Difference]: With dead ends: 130 [2020-10-27 14:35:17,028 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 14:35:17,029 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 [2020-10-27 14:35:17,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 14:35:17,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 53. [2020-10-27 14:35:17,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:35:17,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-27 14:35:17,036 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 47 [2020-10-27 14:35:17,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:17,037 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-27 14:35:17,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:35:17,037 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-27 14:35:17,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 14:35:17,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:17,038 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:17,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:35:17,038 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:17,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1155974626, now seen corresponding path program 16 times [2020-10-27 14:35:17,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:17,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515543071] [2020-10-27 14:35:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:17,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:17,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:17,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:22,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:22,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:35:22,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:35:22,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:35:22,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:22,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:35:22,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:35:22,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:35:22,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:22,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:22,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:22,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:22,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:22,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:22,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:35:22,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:22,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:22,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:22,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:22,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-27 14:35:22,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515543071] [2020-10-27 14:35:22,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:22,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:35:22,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842619299] [2020-10-27 14:35:22,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:35:22,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:22,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:35:22,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:35:22,411 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 20 states. [2020-10-27 14:35:23,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:23,023 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2020-10-27 14:35:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:35:23,030 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-27 14:35:23,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:23,031 INFO L225 Difference]: With dead ends: 136 [2020-10-27 14:35:23,031 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 14:35:23,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:35:23,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 14:35:23,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 55. [2020-10-27 14:35:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 14:35:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-27 14:35:23,044 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 49 [2020-10-27 14:35:23,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:23,046 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-27 14:35:23,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:35:23,046 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-27 14:35:23,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:35:23,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:23,047 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:23,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:35:23,048 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:23,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:23,050 INFO L82 PathProgramCache]: Analyzing trace with hash -236462591, now seen corresponding path program 17 times [2020-10-27 14:35:23,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:23,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283347509] [2020-10-27 14:35:23,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:23,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:23,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:28,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:28,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:35:28,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:28,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:35:28,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:28,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:35:28,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 14:35:28,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 14:35:28,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:28,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:28,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:28,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:28,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:28,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:28,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:35:28,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:28,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:28,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:28,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:28,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-27 14:35:28,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283347509] [2020-10-27 14:35:28,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:28,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:35:28,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110315738] [2020-10-27 14:35:28,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:35:28,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:28,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:35:28,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:35:28,484 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 21 states. [2020-10-27 14:35:28,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:28,927 INFO L93 Difference]: Finished difference Result 142 states and 165 transitions. [2020-10-27 14:35:28,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:35:28,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-27 14:35:28,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:28,931 INFO L225 Difference]: With dead ends: 142 [2020-10-27 14:35:28,931 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:35:28,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:35:28,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:35:28,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 57. [2020-10-27 14:35:28,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:35:28,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-27 14:35:28,950 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2020-10-27 14:35:28,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:28,951 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-27 14:35:28,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:35:28,951 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-27 14:35:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:35:28,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:28,952 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:28,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:35:28,952 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:28,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1262755394, now seen corresponding path program 18 times [2020-10-27 14:35:28,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:28,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633582151] [2020-10-27 14:35:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:28,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:29,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:33,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:33,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:35:33,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:33,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:35:33,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:33,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:35:33,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:35:33,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:35:33,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:34,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:34,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:34,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:34,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:34,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:34,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:35:34,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:34,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:34,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-27 14:35:34,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633582151] [2020-10-27 14:35:34,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:34,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:35:34,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979563975] [2020-10-27 14:35:34,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:35:34,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:34,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:35:34,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:35:34,354 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 22 states. [2020-10-27 14:35:34,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:34,866 INFO L93 Difference]: Finished difference Result 148 states and 172 transitions. [2020-10-27 14:35:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:35:34,866 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-10-27 14:35:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:34,868 INFO L225 Difference]: With dead ends: 148 [2020-10-27 14:35:34,868 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:35:34,869 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 [2020-10-27 14:35:34,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:35:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 59. [2020-10-27 14:35:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 14:35:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-27 14:35:34,886 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 53 [2020-10-27 14:35:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:34,887 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-27 14:35:34,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:35:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-27 14:35:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 14:35:34,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:34,888 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:34,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:35:34,891 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:34,892 INFO L82 PathProgramCache]: Analyzing trace with hash -563668319, now seen corresponding path program 19 times [2020-10-27 14:35:34,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:34,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842485943] [2020-10-27 14:35:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:34,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:35,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:39,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:39,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 14:35:39,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:39,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 14:35:39,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:39,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:35:39,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 14:35:39,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:35:39,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:40,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:40,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:40,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:40,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:40,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:40,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:40,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:40,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:40,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-27 14:35:40,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842485943] [2020-10-27 14:35:40,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:40,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:35:40,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777954852] [2020-10-27 14:35:40,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:35:40,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:40,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:35:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:35:40,348 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 23 states. [2020-10-27 14:35:40,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:40,848 INFO L93 Difference]: Finished difference Result 154 states and 179 transitions. [2020-10-27 14:35:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:35:40,849 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2020-10-27 14:35:40,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:40,850 INFO L225 Difference]: With dead ends: 154 [2020-10-27 14:35:40,851 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 14:35:40,852 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 [2020-10-27 14:35:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 14:35:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 61. [2020-10-27 14:35:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 14:35:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-27 14:35:40,859 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 55 [2020-10-27 14:35:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:40,859 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-27 14:35:40,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:35:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-27 14:35:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:35:40,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:40,860 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:40,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:35:40,860 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash 262127266, now seen corresponding path program 20 times [2020-10-27 14:35:40,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:40,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594020547] [2020-10-27 14:35:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:40,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:41,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:45,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:45,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:35:45,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:45,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:35:45,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:45,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:35:45,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:35:45,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:35:45,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:46,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:46,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:46,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:46,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:46,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:46,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:46,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:46,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:46,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:46,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:46,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-27 14:35:46,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594020547] [2020-10-27 14:35:46,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:46,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:35:46,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808204267] [2020-10-27 14:35:46,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:35:46,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:46,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:35:46,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:35:46,309 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 24 states. [2020-10-27 14:35:46,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:46,874 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2020-10-27 14:35:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:35:46,877 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2020-10-27 14:35:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:46,878 INFO L225 Difference]: With dead ends: 160 [2020-10-27 14:35:46,878 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:35:46,879 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 [2020-10-27 14:35:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:35:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 63. [2020-10-27 14:35:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:35:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-27 14:35:46,885 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2020-10-27 14:35:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:46,886 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-27 14:35:46,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:35:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-27 14:35:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:35:46,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:46,887 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:46,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:35:46,887 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:46,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1455722305, now seen corresponding path program 21 times [2020-10-27 14:35:46,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:46,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58070922] [2020-10-27 14:35:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:47,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:51,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:51,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 14:35:51,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:51,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 14:35:51,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:51,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:35:51,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 14:35:51,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:35:51,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:52,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:52,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:52,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:52,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:52,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:52,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:35:52,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:52,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:52,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:52,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:52,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-10-27 14:35:52,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58070922] [2020-10-27 14:35:52,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:52,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:35:52,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087234566] [2020-10-27 14:35:52,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:35:52,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:52,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:35:52,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:35:52,408 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 25 states. [2020-10-27 14:35:52,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:52,972 INFO L93 Difference]: Finished difference Result 166 states and 193 transitions. [2020-10-27 14:35:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:35:52,973 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-27 14:35:52,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:52,975 INFO L225 Difference]: With dead ends: 166 [2020-10-27 14:35:52,975 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 14:35:52,976 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 [2020-10-27 14:35:52,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 14:35:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 65. [2020-10-27 14:35:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:35:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-27 14:35:52,983 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 59 [2020-10-27 14:35:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:52,983 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-27 14:35:52,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:35:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-27 14:35:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 14:35:52,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:52,984 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:52,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:35:52,984 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:52,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash 387426050, now seen corresponding path program 22 times [2020-10-27 14:35:52,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:52,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249133851] [2020-10-27 14:35:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:53,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:53,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:58,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:58,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:35:58,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:35:58,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:35:58,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:58,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:35:58,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:35:58,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:35:58,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:58,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:35:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:58,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:58,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:35:58,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:35:58,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:35:58,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:35:58,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:35:58,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:35:58,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:35:58,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:35:58,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:35:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-10-27 14:35:58,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249133851] [2020-10-27 14:35:58,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:35:58,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:35:58,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096442937] [2020-10-27 14:35:58,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:35:58,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:35:58,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:35:58,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:35:58,500 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2020-10-27 14:35:59,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:35:59,108 INFO L93 Difference]: Finished difference Result 172 states and 200 transitions. [2020-10-27 14:35:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:35:59,109 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 61 [2020-10-27 14:35:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:35:59,110 INFO L225 Difference]: With dead ends: 172 [2020-10-27 14:35:59,111 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 14:35:59,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:35:59,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 14:35:59,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 67. [2020-10-27 14:35:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 14:35:59,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-27 14:35:59,119 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 61 [2020-10-27 14:35:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:35:59,119 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-27 14:35:59,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:35:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-27 14:35:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:35:59,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:35:59,120 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:35:59,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:35:59,121 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:35:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:35:59,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1138899937, now seen corresponding path program 23 times [2020-10-27 14:35:59,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:35:59,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406709909] [2020-10-27 14:35:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:35:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:35:59,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:35:59,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:04,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:04,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:36:04,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:04,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:36:04,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:36:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 14:36:04,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:36:04,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:04,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:04,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:04,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:04,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:04,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:04,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:36:04,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:04,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:04,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:04,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:04,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-10-27 14:36:04,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406709909] [2020-10-27 14:36:04,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:04,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:36:04,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867522333] [2020-10-27 14:36:04,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:36:04,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:04,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:36:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:36:04,672 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 27 states. [2020-10-27 14:36:05,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:05,283 INFO L93 Difference]: Finished difference Result 178 states and 207 transitions. [2020-10-27 14:36:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:36:05,284 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 63 [2020-10-27 14:36:05,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:05,285 INFO L225 Difference]: With dead ends: 178 [2020-10-27 14:36:05,285 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 14:36:05,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:36:05,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 14:36:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 69. [2020-10-27 14:36:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:36:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-27 14:36:05,293 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 63 [2020-10-27 14:36:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:05,293 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-27 14:36:05,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:36:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-27 14:36:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 14:36:05,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:05,294 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:05,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:36:05,294 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:05,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:05,294 INFO L82 PathProgramCache]: Analyzing trace with hash -817244318, now seen corresponding path program 24 times [2020-10-27 14:36:05,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:05,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644043557] [2020-10-27 14:36:05,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:05,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:05,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:10,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:10,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:36:10,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:10,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:36:10,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:10,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:36:10,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:36:10,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:36:10,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:10,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:10,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:10,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:10,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:10,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:10,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:36:10,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:10,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:10,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:10,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:10,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-27 14:36:10,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644043557] [2020-10-27 14:36:10,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:10,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:36:10,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793563882] [2020-10-27 14:36:10,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:36:10,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:10,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:36:10,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:36:10,892 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 28 states. [2020-10-27 14:36:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:11,622 INFO L93 Difference]: Finished difference Result 184 states and 214 transitions. [2020-10-27 14:36:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:36:11,623 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 65 [2020-10-27 14:36:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:11,625 INFO L225 Difference]: With dead ends: 184 [2020-10-27 14:36:11,625 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 14:36:11,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:36:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 14:36:11,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 71. [2020-10-27 14:36:11,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 14:36:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-27 14:36:11,633 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 65 [2020-10-27 14:36:11,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:11,634 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-27 14:36:11,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:36:11,634 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-27 14:36:11,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 14:36:11,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:11,635 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:11,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:36:11,635 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:11,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1776148351, now seen corresponding path program 25 times [2020-10-27 14:36:11,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:11,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74811168] [2020-10-27 14:36:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:11,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:11,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:16,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:16,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 14:36:16,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:16,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:36:16,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:16,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:36:16,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 14:36:16,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:36:16,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:17,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:17,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:17,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:17,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:17,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:17,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:17,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:17,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:17,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:17,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-10-27 14:36:17,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74811168] [2020-10-27 14:36:17,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:17,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:36:17,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501097085] [2020-10-27 14:36:17,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:36:17,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:17,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:36:17,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:36:17,274 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 29 states. [2020-10-27 14:36:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:17,874 INFO L93 Difference]: Finished difference Result 190 states and 221 transitions. [2020-10-27 14:36:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:36:17,875 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-10-27 14:36:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:17,876 INFO L225 Difference]: With dead ends: 190 [2020-10-27 14:36:17,876 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 14:36:17,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:36:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 14:36:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 73. [2020-10-27 14:36:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 14:36:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-27 14:36:17,885 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 67 [2020-10-27 14:36:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:17,885 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-27 14:36:17,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:36:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-27 14:36:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:36:17,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:17,886 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:17,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:36:17,887 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:17,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:17,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1851019202, now seen corresponding path program 26 times [2020-10-27 14:36:17,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:17,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139465649] [2020-10-27 14:36:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:17,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:18,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:22,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:22,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:36:22,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:22,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:36:22,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:22,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:36:22,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:36:22,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:36:22,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:23,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:23,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:23,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:23,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:23,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:23,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:36:23,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:23,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:23,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:23,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:23,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-27 14:36:23,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139465649] [2020-10-27 14:36:23,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:23,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:36:23,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666519099] [2020-10-27 14:36:23,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:36:23,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:23,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:36:23,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:36:23,577 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 30 states. [2020-10-27 14:36:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:24,238 INFO L93 Difference]: Finished difference Result 196 states and 228 transitions. [2020-10-27 14:36:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:36:24,239 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 69 [2020-10-27 14:36:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:24,241 INFO L225 Difference]: With dead ends: 196 [2020-10-27 14:36:24,241 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 14:36:24,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:36:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 14:36:24,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 75. [2020-10-27 14:36:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 14:36:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-27 14:36:24,249 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 69 [2020-10-27 14:36:24,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:24,250 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-27 14:36:24,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:36:24,250 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-27 14:36:24,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:36:24,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:24,251 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:24,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:36:24,251 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:24,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1701199137, now seen corresponding path program 27 times [2020-10-27 14:36:24,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:24,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958868022] [2020-10-27 14:36:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:24,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:24,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:29,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:29,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:36:29,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:29,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 14:36:29,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:29,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:36:29,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 14:36:29,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:36:29,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:29,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:29,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:29,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:29,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:29,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:29,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:29,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:29,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:29,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:29,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:29,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-27 14:36:29,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958868022] [2020-10-27 14:36:29,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:29,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:36:29,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065143200] [2020-10-27 14:36:29,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:36:29,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:29,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:36:29,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:36:29,978 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 31 states. [2020-10-27 14:36:30,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:30,667 INFO L93 Difference]: Finished difference Result 202 states and 235 transitions. [2020-10-27 14:36:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:36:30,668 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 71 [2020-10-27 14:36:30,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:30,669 INFO L225 Difference]: With dead ends: 202 [2020-10-27 14:36:30,669 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 14:36:30,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:36:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 14:36:30,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 77. [2020-10-27 14:36:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:36:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-27 14:36:30,679 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 71 [2020-10-27 14:36:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:30,679 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-27 14:36:30,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:36:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-27 14:36:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:36:30,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:30,684 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:30,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:36:30,684 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash -757788638, now seen corresponding path program 28 times [2020-10-27 14:36:30,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:30,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50587566] [2020-10-27 14:36:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:30,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:30,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:35,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:35,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:36:35,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:35,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:36:35,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:35,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:36:35,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:36:35,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:36:35,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:36,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:36,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:36,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:36,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:36,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:36,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:36,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:36,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:36,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:36,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:36,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-27 14:36:36,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50587566] [2020-10-27 14:36:36,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:36,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:36:36,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628440914] [2020-10-27 14:36:36,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:36:36,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:36,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:36:36,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:36:36,458 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 32 states. [2020-10-27 14:36:37,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:37,399 INFO L93 Difference]: Finished difference Result 208 states and 242 transitions. [2020-10-27 14:36:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:36:37,400 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 73 [2020-10-27 14:36:37,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:37,401 INFO L225 Difference]: With dead ends: 208 [2020-10-27 14:36:37,401 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 14:36:37,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:36:37,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 14:36:37,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 79. [2020-10-27 14:36:37,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 14:36:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-27 14:36:37,409 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 73 [2020-10-27 14:36:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:37,409 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-27 14:36:37,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:36:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-27 14:36:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:36:37,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:37,410 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:37,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:36:37,410 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:37,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:37,411 INFO L82 PathProgramCache]: Analyzing trace with hash 286298561, now seen corresponding path program 29 times [2020-10-27 14:36:37,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:37,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751366605] [2020-10-27 14:36:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:37,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:37,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:42,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:42,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:36:42,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:42,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 14:36:42,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:42,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:36:42,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-27 14:36:42,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:36:42,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:43,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:43,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:43,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:43,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:43,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:43,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:36:43,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:43,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:43,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:43,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:43,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-10-27 14:36:43,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751366605] [2020-10-27 14:36:43,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:43,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:36:43,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873033825] [2020-10-27 14:36:43,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:36:43,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:43,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:36:43,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:36:43,255 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 33 states. [2020-10-27 14:36:44,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:44,051 INFO L93 Difference]: Finished difference Result 214 states and 249 transitions. [2020-10-27 14:36:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:36:44,056 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 75 [2020-10-27 14:36:44,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:44,057 INFO L225 Difference]: With dead ends: 214 [2020-10-27 14:36:44,057 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 14:36:44,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:36:44,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 14:36:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 81. [2020-10-27 14:36:44,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 14:36:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-27 14:36:44,070 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 75 [2020-10-27 14:36:44,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:44,071 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-27 14:36:44,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:36:44,071 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-27 14:36:44,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 14:36:44,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:44,072 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:44,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:36:44,072 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:44,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1676286082, now seen corresponding path program 30 times [2020-10-27 14:36:44,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:44,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090755978] [2020-10-27 14:36:44,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:44,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:44,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:49,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:49,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:36:49,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:49,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 14:36:49,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:49,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:36:49,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:36:49,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:36:49,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:49,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:49,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:49,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:49,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:49,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:49,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:36:49,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:49,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:49,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:49,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:49,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-10-27 14:36:49,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090755978] [2020-10-27 14:36:49,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:49,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:36:49,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132935467] [2020-10-27 14:36:49,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:36:49,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:49,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:36:49,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:36:49,956 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 34 states. [2020-10-27 14:36:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:50,772 INFO L93 Difference]: Finished difference Result 220 states and 256 transitions. [2020-10-27 14:36:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:36:50,773 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-10-27 14:36:50,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:50,775 INFO L225 Difference]: With dead ends: 220 [2020-10-27 14:36:50,775 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 14:36:50,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:36:50,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 14:36:50,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 83. [2020-10-27 14:36:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:36:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-27 14:36:50,782 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 77 [2020-10-27 14:36:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:50,783 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-27 14:36:50,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:36:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-27 14:36:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:36:50,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:50,784 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:50,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:36:50,784 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1610817121, now seen corresponding path program 31 times [2020-10-27 14:36:50,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:50,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939956618] [2020-10-27 14:36:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:50,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:51,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:55,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:55,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:36:55,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:36:55,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 14:36:55,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:55,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:36:55,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-27 14:36:55,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:36:55,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:56,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:36:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:56,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:56,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:36:56,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:36:56,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:36:56,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:36:56,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:36:56,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:36:56,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:36:56,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:36:56,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:36:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-27 14:36:56,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939956618] [2020-10-27 14:36:56,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:36:56,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:36:56,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989473725] [2020-10-27 14:36:56,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:36:56,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:36:56,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:36:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:36:56,709 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 35 states. [2020-10-27 14:36:57,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:36:57,557 INFO L93 Difference]: Finished difference Result 226 states and 263 transitions. [2020-10-27 14:36:57,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:36:57,558 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 79 [2020-10-27 14:36:57,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:36:57,560 INFO L225 Difference]: With dead ends: 226 [2020-10-27 14:36:57,560 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 14:36:57,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:36:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 14:36:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 85. [2020-10-27 14:36:57,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 14:36:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-27 14:36:57,569 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 79 [2020-10-27 14:36:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:36:57,569 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-27 14:36:57,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:36:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-27 14:36:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:36:57,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:36:57,570 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:36:57,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:36:57,571 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:36:57,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:36:57,571 INFO L82 PathProgramCache]: Analyzing trace with hash -248420126, now seen corresponding path program 32 times [2020-10-27 14:36:57,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:36:57,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84998786] [2020-10-27 14:36:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:36:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:36:57,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:36:58,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:02,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:02,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 14:37:02,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:02,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:37:02,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:02,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:37:02,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:37:02,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:37:02,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:03,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:03,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:03,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:03,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:03,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:03,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:03,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:03,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:03,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:03,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:03,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-27 14:37:03,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84998786] [2020-10-27 14:37:03,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:03,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:37:03,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585346687] [2020-10-27 14:37:03,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:37:03,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:37:03,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:37:03,492 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 36 states. [2020-10-27 14:37:04,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:04,556 INFO L93 Difference]: Finished difference Result 232 states and 270 transitions. [2020-10-27 14:37:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:37:04,556 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 81 [2020-10-27 14:37:04,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:04,558 INFO L225 Difference]: With dead ends: 232 [2020-10-27 14:37:04,558 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 14:37:04,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:37:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 14:37:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 87. [2020-10-27 14:37:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 14:37:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-27 14:37:04,565 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 81 [2020-10-27 14:37:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:04,566 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-27 14:37:04,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:37:04,566 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-27 14:37:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:37:04,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:04,567 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:04,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:37:04,567 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:04,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:04,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1600134399, now seen corresponding path program 33 times [2020-10-27 14:37:04,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:04,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145461695] [2020-10-27 14:37:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:04,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:05,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:09,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:09,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:37:09,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:09,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:37:09,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:09,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:37:09,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-27 14:37:09,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:37:09,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:10,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:10,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:10,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:10,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:10,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:10,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:37:10,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:10,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:10,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:10,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:10,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-10-27 14:37:10,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145461695] [2020-10-27 14:37:10,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:10,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:37:10,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841291694] [2020-10-27 14:37:10,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:37:10,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:10,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:37:10,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:37:10,580 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 37 states. [2020-10-27 14:37:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:11,505 INFO L93 Difference]: Finished difference Result 238 states and 277 transitions. [2020-10-27 14:37:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:37:11,506 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 83 [2020-10-27 14:37:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:11,508 INFO L225 Difference]: With dead ends: 238 [2020-10-27 14:37:11,509 INFO L226 Difference]: Without dead ends: 191 [2020-10-27 14:37:11,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:37:11,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-27 14:37:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 89. [2020-10-27 14:37:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 14:37:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-27 14:37:11,516 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 83 [2020-10-27 14:37:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:11,516 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-27 14:37:11,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:37:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-27 14:37:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:37:11,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:11,517 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:11,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:37:11,518 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:11,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:11,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1832320702, now seen corresponding path program 34 times [2020-10-27 14:37:11,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:11,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765323429] [2020-10-27 14:37:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:11,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:12,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:16,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:16,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:37:16,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:16,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 14:37:16,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:16,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:37:16,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:37:16,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:37:16,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:17,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:17,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:17,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:17,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:17,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:17,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:17,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:17,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:17,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:17,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:17,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-10-27 14:37:17,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765323429] [2020-10-27 14:37:17,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:17,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:37:17,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397705259] [2020-10-27 14:37:17,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:37:17,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:37:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:37:17,609 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 38 states. [2020-10-27 14:37:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:18,552 INFO L93 Difference]: Finished difference Result 244 states and 284 transitions. [2020-10-27 14:37:18,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:37:18,553 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 85 [2020-10-27 14:37:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:18,554 INFO L225 Difference]: With dead ends: 244 [2020-10-27 14:37:18,554 INFO L226 Difference]: Without dead ends: 196 [2020-10-27 14:37:18,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:37:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-27 14:37:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 91. [2020-10-27 14:37:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:37:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-27 14:37:18,562 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 85 [2020-10-27 14:37:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:18,562 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-27 14:37:18,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:37:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-27 14:37:18,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:37:18,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:18,563 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:18,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:37:18,563 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:18,564 INFO L82 PathProgramCache]: Analyzing trace with hash -926359647, now seen corresponding path program 35 times [2020-10-27 14:37:18,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:18,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972482610] [2020-10-27 14:37:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:18,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:19,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:23,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:23,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:37:23,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:23,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:37:23,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:23,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:37:23,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 14:37:23,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 14:37:23,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:24,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:24,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:24,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:24,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:24,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:24,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:24,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:24,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:24,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:24,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:24,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-10-27 14:37:24,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972482610] [2020-10-27 14:37:24,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:24,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:37:24,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979933428] [2020-10-27 14:37:24,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:37:24,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:24,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:37:24,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:37:24,727 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 39 states. [2020-10-27 14:37:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:25,668 INFO L93 Difference]: Finished difference Result 250 states and 291 transitions. [2020-10-27 14:37:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:37:25,669 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 87 [2020-10-27 14:37:25,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:25,671 INFO L225 Difference]: With dead ends: 250 [2020-10-27 14:37:25,671 INFO L226 Difference]: Without dead ends: 201 [2020-10-27 14:37:25,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:37:25,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-27 14:37:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 93. [2020-10-27 14:37:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:37:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-27 14:37:25,682 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 87 [2020-10-27 14:37:25,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:25,682 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-27 14:37:25,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:37:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-27 14:37:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 14:37:25,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:25,684 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:25,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:37:25,684 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:25,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1991319134, now seen corresponding path program 36 times [2020-10-27 14:37:25,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:25,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308005308] [2020-10-27 14:37:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:25,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:26,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:30,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:30,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 14:37:30,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:30,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 14:37:30,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:37:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 14:37:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:37:30,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:31,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:31,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:31,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:31,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:31,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:31,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:31,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:31,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:31,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:31,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:31,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:37:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2020-10-27 14:37:31,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308005308] [2020-10-27 14:37:31,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:31,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:37:31,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79584440] [2020-10-27 14:37:31,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:37:31,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:31,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:37:31,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:37:31,856 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 40 states. [2020-10-27 14:37:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:33,151 INFO L93 Difference]: Finished difference Result 256 states and 298 transitions. [2020-10-27 14:37:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:37:33,152 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 89 [2020-10-27 14:37:33,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:33,154 INFO L225 Difference]: With dead ends: 256 [2020-10-27 14:37:33,154 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 14:37:33,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:37:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 14:37:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 95. [2020-10-27 14:37:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 14:37:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-27 14:37:33,162 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 89 [2020-10-27 14:37:33,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:33,162 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-27 14:37:33,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:37:33,163 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-27 14:37:33,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-27 14:37:33,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:33,164 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:33,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:37:33,164 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:33,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:33,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1780476863, now seen corresponding path program 37 times [2020-10-27 14:37:33,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:33,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484003872] [2020-10-27 14:37:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:33,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:33,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:38,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:38,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 14:37:38,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:38,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:37:38,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:38,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 14:37:38,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-27 14:37:38,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:37:38,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:39,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:39,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:39,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:39,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:39,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:39,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:39,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:39,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:39,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:39,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:39,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2020-10-27 14:37:39,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484003872] [2020-10-27 14:37:39,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:39,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 14:37:39,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268856885] [2020-10-27 14:37:39,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 14:37:39,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:39,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 14:37:39,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:37:39,342 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 41 states. [2020-10-27 14:37:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:40,414 INFO L93 Difference]: Finished difference Result 262 states and 305 transitions. [2020-10-27 14:37:40,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:37:40,414 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 91 [2020-10-27 14:37:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:40,416 INFO L225 Difference]: With dead ends: 262 [2020-10-27 14:37:40,416 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 14:37:40,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:37:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 14:37:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 97. [2020-10-27 14:37:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 14:37:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-10-27 14:37:40,424 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 91 [2020-10-27 14:37:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:40,424 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-10-27 14:37:40,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 14:37:40,425 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-10-27 14:37:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 14:37:40,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:40,426 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:40,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:37:40,426 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:40,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:40,426 INFO L82 PathProgramCache]: Analyzing trace with hash 501287426, now seen corresponding path program 38 times [2020-10-27 14:37:40,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:40,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294071746] [2020-10-27 14:37:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:40,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:40,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:45,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:45,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 14:37:45,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:45,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:37:45,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:45,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 14:37:45,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:37:45,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:37:45,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:46,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:46,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:46,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:46,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:46,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:46,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:46,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:46,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:46,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:46,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:46,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2020-10-27 14:37:46,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294071746] [2020-10-27 14:37:46,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:46,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 14:37:46,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236562527] [2020-10-27 14:37:46,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 14:37:46,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:46,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 14:37:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:37:46,693 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 42 states. [2020-10-27 14:37:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:47,710 INFO L93 Difference]: Finished difference Result 268 states and 312 transitions. [2020-10-27 14:37:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:37:47,711 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 93 [2020-10-27 14:37:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:47,713 INFO L225 Difference]: With dead ends: 268 [2020-10-27 14:37:47,713 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 14:37:47,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:37:47,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 14:37:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 99. [2020-10-27 14:37:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 14:37:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-27 14:37:47,732 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 93 [2020-10-27 14:37:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:47,732 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-27 14:37:47,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 14:37:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-27 14:37:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:37:47,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:47,734 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:47,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 14:37:47,734 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:47,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1396211487, now seen corresponding path program 39 times [2020-10-27 14:37:47,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:47,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120387828] [2020-10-27 14:37:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:47,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:48,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:52,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:52,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 14:37:52,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:37:52,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:37:52,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:52,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 14:37:52,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 14:37:52,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:37:52,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:54,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:37:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:54,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:54,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:37:54,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:37:54,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:37:54,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:37:54,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:37:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:37:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:37:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:37:54,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:37:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-10-27 14:37:54,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120387828] [2020-10-27 14:37:54,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:37:54,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 14:37:54,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098411645] [2020-10-27 14:37:54,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 14:37:54,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:37:54,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 14:37:54,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:37:54,143 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 43 states. [2020-10-27 14:37:55,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:37:55,340 INFO L93 Difference]: Finished difference Result 274 states and 319 transitions. [2020-10-27 14:37:55,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:37:55,340 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 95 [2020-10-27 14:37:55,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:37:55,342 INFO L225 Difference]: With dead ends: 274 [2020-10-27 14:37:55,343 INFO L226 Difference]: Without dead ends: 221 [2020-10-27 14:37:55,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:37:55,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-27 14:37:55,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 101. [2020-10-27 14:37:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:37:55,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-10-27 14:37:55,350 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 95 [2020-10-27 14:37:55,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:37:55,350 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-10-27 14:37:55,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 14:37:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-10-27 14:37:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 14:37:55,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:37:55,351 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:37:55,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 14:37:55,352 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:37:55,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:37:55,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2111997342, now seen corresponding path program 40 times [2020-10-27 14:37:55,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:37:55,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322098401] [2020-10-27 14:37:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:37:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:37:55,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:37:55,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:00,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:00,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 14:38:00,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:38:00,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-27 14:38:00,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:00,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 14:38:00,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:38:00,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:38:00,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:01,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:38:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:38:01,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:38:01,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:38:01,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:38:01,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:38:01,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:38:01,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:38:01,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:38:01,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:38:01,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:38:01,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:38:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2020-10-27 14:38:01,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322098401] [2020-10-27 14:38:01,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:38:01,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 14:38:01,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489545071] [2020-10-27 14:38:01,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 14:38:01,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:38:01,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 14:38:01,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:38:01,884 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 44 states.