/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=SHALLOWEST --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-cav19/array_init_pair_sum_const.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 18:58:27,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 18:58:27,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 18:58:27,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 18:58:27,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 18:58:27,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 18:58:27,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 18:58:27,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 18:58:27,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 18:58:27,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 18:58:27,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 18:58:27,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 18:58:27,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 18:58:27,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 18:58:27,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 18:58:27,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 18:58:27,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 18:58:27,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 18:58:27,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 18:58:27,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 18:58:27,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 18:58:27,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 18:58:27,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 18:58:27,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 18:58:27,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 18:58:27,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 18:58:27,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 18:58:27,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 18:58:27,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 18:58:27,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 18:58:27,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 18:58:27,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 18:58:27,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 18:58:27,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 18:58:27,320 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 18:58:27,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 18:58:27,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 18:58:27,321 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 18:58:27,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 18:58:27,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 18:58:27,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 18:58:27,325 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 [2020-10-26 18:58:27,384 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 18:58:27,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 18:58:27,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 18:58:27,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 18:58:27,390 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 18:58:27,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 18:58:27,391 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 18:58:27,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 18:58:27,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 18:58:27,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 18:58:27,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 18:58:27,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 18:58:27,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 18:58:27,394 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 18:58:27,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 18:58:27,394 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 18:58:27,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 18:58:27,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 18:58:27,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 18:58:27,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 18:58:27,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 18:58:27,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 18:58:27,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 18:58:27,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 18:58:27,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 18:58:27,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 18:58:27,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 18:58:27,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 18:58:27,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 18:58:27,398 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 18:58:27,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 18:58:27,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 18:58:27,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 18:58:27,837 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 18:58:27,838 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 18:58:27,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_pair_sum_const.c [2020-10-26 18:58:27,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/011ac668a/49b7b3aa3d854cf2abe667ac4d64ee07/FLAG6af4b81a7 [2020-10-26 18:58:28,631 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 18:58:28,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-cav19/array_init_pair_sum_const.c [2020-10-26 18:58:28,639 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/011ac668a/49b7b3aa3d854cf2abe667ac4d64ee07/FLAG6af4b81a7 [2020-10-26 18:58:29,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/011ac668a/49b7b3aa3d854cf2abe667ac4d64ee07 [2020-10-26 18:58:29,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 18:58:29,020 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 18:58:29,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 18:58:29,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 18:58:29,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 18:58:29,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4118f9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29, skipping insertion in model container [2020-10-26 18:58:29,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 18:58:29,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 18:58:29,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 18:58:29,241 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 18:58:29,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 18:58:29,304 INFO L208 MainTranslator]: Completed translation [2020-10-26 18:58:29,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29 WrapperNode [2020-10-26 18:58:29,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 18:58:29,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 18:58:29,308 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 18:58:29,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 18:58:29,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (1/1) ... [2020-10-26 18:58:29,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 18:58:29,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 18:58:29,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 18:58:29,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 18:58:29,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (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 [2020-10-26 18:58:29,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 18:58:29,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 18:58:29,501 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 18:58:29,501 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 18:58:29,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 18:58:29,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 18:58:29,503 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 18:58:29,503 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 18:58:29,503 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 18:58:29,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 18:58:29,504 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 18:58:29,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 18:58:29,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 18:58:29,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 18:58:29,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 18:58:29,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 18:58:29,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 18:58:29,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 18:58:29,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 18:58:29,984 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 18:58:29,985 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 18:58:29,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 06:58:29 BoogieIcfgContainer [2020-10-26 18:58:29,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 18:58:29,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 18:58:29,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 18:58:30,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 18:58:30,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 06:58:29" (1/3) ... [2020-10-26 18:58:30,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e21b1ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 06:58:30, skipping insertion in model container [2020-10-26 18:58:30,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 06:58:29" (2/3) ... [2020-10-26 18:58:30,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e21b1ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 06:58:30, skipping insertion in model container [2020-10-26 18:58:30,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 06:58:29" (3/3) ... [2020-10-26 18:58:30,008 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_sum_const.c [2020-10-26 18:58:30,022 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 18:58:30,027 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 18:58:30,044 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 18:58:30,088 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 18:58:30,088 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 18:58:30,088 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 18:58:30,088 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 18:58:30,089 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 18:58:30,089 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 18:58:30,089 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 18:58:30,089 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 18:58:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-26 18:58:30,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 18:58:30,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:30,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:30,124 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:30,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:30,131 INFO L82 PathProgramCache]: Analyzing trace with hash 875303383, now seen corresponding path program 1 times [2020-10-26 18:58:30,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:30,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790424215] [2020-10-26 18:58:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:30,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:30,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:30,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:30,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 18:58:30,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 18:58:30,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-26 18:58:30,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:30,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:58:30,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:30,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 18:58:30,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 18:58:30,934 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-26 18:58:30,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:30,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:30,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:30,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:30,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:30,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 18:58:30,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:30,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:30,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:30,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:30,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:30,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790424215] [2020-10-26 18:58:31,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 18:58:31,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 18:58:31,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291568323] [2020-10-26 18:58:31,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 18:58:31,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:31,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 18:58:31,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 18:58:31,037 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 4 states. [2020-10-26 18:58:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:31,219 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-26 18:58:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 18:58:31,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-26 18:58:31,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:31,239 INFO L225 Difference]: With dead ends: 53 [2020-10-26 18:58:31,239 INFO L226 Difference]: Without dead ends: 25 [2020-10-26 18:58:31,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 18:58:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-26 18:58:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-26 18:58:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 18:58:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-26 18:58:31,291 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-10-26 18:58:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:31,291 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-26 18:58:31,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 18:58:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-26 18:58:31,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 18:58:31,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:31,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:31,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 18:58:31,294 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:31,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:31,295 INFO L82 PathProgramCache]: Analyzing trace with hash -974180161, now seen corresponding path program 1 times [2020-10-26 18:58:31,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:31,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109163962] [2020-10-26 18:58:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 18:58:31,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:58:31,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-26 18:58:31,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 18:58:31,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:31,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 18:58:31,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:31,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:31,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:31,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:31,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:31,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 18:58:31,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:31,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:31,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:31,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:31,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:31,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109163962] [2020-10-26 18:58:31,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:31,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 18:58:31,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558154354] [2020-10-26 18:58:31,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 18:58:31,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:31,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 18:58:31,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 18:58:31,848 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-10-26 18:58:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:31,946 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-26 18:58:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 18:58:31,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-26 18:58:31,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:31,948 INFO L225 Difference]: With dead ends: 42 [2020-10-26 18:58:31,948 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 18:58:31,949 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 [2020-10-26 18:58:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 18:58:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-26 18:58:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-26 18:58:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-26 18:58:31,958 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-10-26 18:58:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:31,958 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-26 18:58:31,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 18:58:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-26 18:58:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 18:58:31,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:31,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:31,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 18:58:31,960 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:31,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1390486431, now seen corresponding path program 2 times [2020-10-26 18:58:31,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:31,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914952835] [2020-10-26 18:58:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:31,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:32,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 18:58:32,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:58:32,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 506 [2020-10-26 18:58:32,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 18:58:32,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:32,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:58:32,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:32,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:32,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:32,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:32,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:32,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:58:32,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:32,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:32,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:32,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914952835] [2020-10-26 18:58:32,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:32,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 18:58:32,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969388065] [2020-10-26 18:58:32,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 18:58:32,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:32,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 18:58:32,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 18:58:32,593 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2020-10-26 18:58:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:32,711 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-26 18:58:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 18:58:32,712 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-26 18:58:32,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:32,713 INFO L225 Difference]: With dead ends: 44 [2020-10-26 18:58:32,714 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 18:58:32,715 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 [2020-10-26 18:58:32,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 18:58:32,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-26 18:58:32,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 18:58:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-26 18:58:32,723 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-10-26 18:58:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:32,724 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-26 18:58:32,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 18:58:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-26 18:58:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 18:58:32,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:32,725 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:32,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 18:58:32,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:32,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2028853373, now seen corresponding path program 3 times [2020-10-26 18:58:32,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:32,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000573100] [2020-10-26 18:58:32,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:32,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:32,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 18:58:33,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:58:33,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-26 18:58:33,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:58:33,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:33,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 18:58:33,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:33,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:33,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:33,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:33,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 18:58:33,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:33,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:33,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:33,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:33,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000573100] [2020-10-26 18:58:33,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:33,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 18:58:33,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453715170] [2020-10-26 18:58:33,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 18:58:33,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:33,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 18:58:33,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 18:58:33,341 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2020-10-26 18:58:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:33,460 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-26 18:58:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 18:58:33,460 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-26 18:58:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:33,462 INFO L225 Difference]: With dead ends: 46 [2020-10-26 18:58:33,462 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 18:58:33,463 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 [2020-10-26 18:58:33,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 18:58:33,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-26 18:58:33,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 18:58:33,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-26 18:58:33,470 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 22 [2020-10-26 18:58:33,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:33,470 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-26 18:58:33,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 18:58:33,470 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-26 18:58:33,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 18:58:33,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:33,471 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:33,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 18:58:33,472 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:33,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:33,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1319161307, now seen corresponding path program 4 times [2020-10-26 18:58:33,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:33,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566695911] [2020-10-26 18:58:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:33,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:33,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:33,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 18:58:33,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:58:33,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-26 18:58:33,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:33,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 18:58:33,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:33,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 18:58:33,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:34,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:34,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:34,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:34,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:34,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:34,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:34,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:34,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 18:58:34,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566695911] [2020-10-26 18:58:34,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:34,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 18:58:34,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654942479] [2020-10-26 18:58:34,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 18:58:34,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:34,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 18:58:34,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 18:58:34,031 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-26 18:58:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:34,156 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-26 18:58:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 18:58:34,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-26 18:58:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:34,157 INFO L225 Difference]: With dead ends: 48 [2020-10-26 18:58:34,157 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 18:58:34,158 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 [2020-10-26 18:58:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 18:58:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-26 18:58:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 18:58:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-26 18:58:34,165 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2020-10-26 18:58:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:34,166 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-26 18:58:34,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 18:58:34,166 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-26 18:58:34,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 18:58:34,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:34,167 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:34,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 18:58:34,167 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:34,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:34,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2090081351, now seen corresponding path program 5 times [2020-10-26 18:58:34,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:34,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067838172] [2020-10-26 18:58:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:34,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:34,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:34,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:34,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:34,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 18:58:34,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:58:34,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-26 18:58:34,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:34,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 18:58:34,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:34,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 18:58:34,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:34,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:34,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:34,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:34,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:34,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:34,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:34,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:34,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:34,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:34,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:34,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-26 18:58:34,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067838172] [2020-10-26 18:58:34,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 18:58:34,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 18:58:34,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954107682] [2020-10-26 18:58:34,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 18:58:34,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:34,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 18:58:34,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 18:58:34,827 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 5 states. [2020-10-26 18:58:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:34,917 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-26 18:58:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 18:58:34,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-26 18:58:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:34,919 INFO L225 Difference]: With dead ends: 46 [2020-10-26 18:58:34,919 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 18:58:34,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 18:58:34,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 18:58:34,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-26 18:58:34,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 18:58:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-26 18:58:34,927 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2020-10-26 18:58:34,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:34,927 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-26 18:58:34,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 18:58:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-26 18:58:34,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 18:58:34,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:34,928 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:34,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 18:58:34,929 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:34,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1582698967, now seen corresponding path program 1 times [2020-10-26 18:58:34,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:34,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107754868] [2020-10-26 18:58:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:35,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:35,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:36,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:36,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 18:58:36,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:58:36,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1339 [2020-10-26 18:58:36,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:36,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 18:58:36,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:36,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 18:58:36,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:36,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:36,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:36,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:36,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:36,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:36,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 18:58:36,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:36,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:36,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:36,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:36,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-26 18:58:36,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107754868] [2020-10-26 18:58:36,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:36,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 18:58:36,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255823783] [2020-10-26 18:58:36,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 18:58:36,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:36,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 18:58:36,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 18:58:36,371 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 6 states. [2020-10-26 18:58:36,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:36,493 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-26 18:58:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 18:58:36,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-26 18:58:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:36,496 INFO L225 Difference]: With dead ends: 52 [2020-10-26 18:58:36,497 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 18:58:36,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 18:58:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 18:58:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-26 18:58:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 18:58:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-26 18:58:36,508 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-10-26 18:58:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:36,508 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-26 18:58:36,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 18:58:36,508 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-26 18:58:36,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 18:58:36,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:36,509 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:36,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 18:58:36,510 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:36,510 INFO L82 PathProgramCache]: Analyzing trace with hash -661467253, now seen corresponding path program 2 times [2020-10-26 18:58:36,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:36,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455569656] [2020-10-26 18:58:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:36,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:36,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:36,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:37,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:41,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:41,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 18:58:41,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:58:41,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 18:58:41,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:41,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 18:58:41,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:41,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 18:58:41,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:41,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:41,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:41,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:41,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:41,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:41,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:41,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:41,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:41,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:41,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:41,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 18:58:41,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455569656] [2020-10-26 18:58:41,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:41,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 18:58:41,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082689177] [2020-10-26 18:58:41,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 18:58:41,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:41,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 18:58:41,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 18:58:41,627 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 9 states. [2020-10-26 18:58:41,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:41,752 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-10-26 18:58:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 18:58:41,752 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-26 18:58:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:41,753 INFO L225 Difference]: With dead ends: 56 [2020-10-26 18:58:41,753 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 18:58:41,754 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 [2020-10-26 18:58:41,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 18:58:41,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-26 18:58:41,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 18:58:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-26 18:58:41,761 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2020-10-26 18:58:41,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:41,761 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-26 18:58:41,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 18:58:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-26 18:58:41,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 18:58:41,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:41,763 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:41,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 18:58:41,763 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:41,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:41,764 INFO L82 PathProgramCache]: Analyzing trace with hash -444327891, now seen corresponding path program 3 times [2020-10-26 18:58:41,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:41,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264853623] [2020-10-26 18:58:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:41,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:41,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:41,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:44,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:46,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:46,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 18:58:46,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:58:46,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 18:58:46,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:46,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 18:58:46,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:46,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 18:58:46,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:47,324 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2020-10-26 18:58:47,477 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 29 [2020-10-26 18:58:47,792 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 46 [2020-10-26 18:58:47,928 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2020-10-26 18:58:48,164 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 36 [2020-10-26 18:58:48,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:48,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:48,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:48,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:48,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:48,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:48,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:48,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:48,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:48,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:48,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-26 18:58:48,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264853623] [2020-10-26 18:58:48,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:48,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 18:58:48,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020371848] [2020-10-26 18:58:48,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 18:58:48,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:48,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 18:58:48,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-26 18:58:48,335 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-26 18:58:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:49,119 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-26 18:58:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 18:58:49,119 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-26 18:58:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:49,121 INFO L225 Difference]: With dead ends: 49 [2020-10-26 18:58:49,121 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 18:58:49,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-26 18:58:49,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 18:58:49,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-26 18:58:49,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 18:58:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-26 18:58:49,131 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 32 [2020-10-26 18:58:49,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:49,131 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-26 18:58:49,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 18:58:49,131 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-26 18:58:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 18:58:49,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:49,133 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:49,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 18:58:49,133 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1920868755, now seen corresponding path program 1 times [2020-10-26 18:58:49,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:49,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122215075] [2020-10-26 18:58:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:49,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:49,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:52,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:52,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 18:58:52,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:58:52,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2900 [2020-10-26 18:58:52,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:52,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 18:58:52,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:52,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 18:58:52,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:52,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:52,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:52,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:52,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:52,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:52,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:52,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:52,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:52,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:52,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:52,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:52,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 18:58:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:52,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:52,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:52,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:58:52,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:52,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:58:52,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:58:52,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:52,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-26 18:58:52,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122215075] [2020-10-26 18:58:52,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:52,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 18:58:52,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600301804] [2020-10-26 18:58:52,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 18:58:52,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:52,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 18:58:52,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 18:58:52,161 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 7 states. [2020-10-26 18:58:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:52,324 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-10-26 18:58:52,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 18:58:52,325 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-26 18:58:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:52,326 INFO L225 Difference]: With dead ends: 70 [2020-10-26 18:58:52,326 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 18:58:52,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 18:58:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 18:58:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-10-26 18:58:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 18:58:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-26 18:58:52,345 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2020-10-26 18:58:52,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:52,347 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-26 18:58:52,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 18:58:52,347 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-26 18:58:52,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 18:58:52,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:52,351 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:52,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 18:58:52,351 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:52,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:52,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1749487605, now seen corresponding path program 2 times [2020-10-26 18:58:52,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:52,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792674521] [2020-10-26 18:58:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:52,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:52,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:53,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:57,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:57,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:57,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 18:58:57,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:58:57,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 18:58:57,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:57,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 18:58:57,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:58:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 18:58:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:57,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:58:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:57,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:57,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:57,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:58:57,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:57,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:58:57,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:57,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:57,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:58:57,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:57,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:57,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 18:58:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:57,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:57,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:58:57,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:58:57,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:58:57,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:58:57,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:58:57,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:58:57,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:58:57,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:58:57,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:58:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 18:58:57,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792674521] [2020-10-26 18:58:57,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:58:57,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 18:58:57,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209500004] [2020-10-26 18:58:57,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 18:58:57,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:58:57,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 18:58:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 18:58:57,567 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 10 states. [2020-10-26 18:58:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:58:57,728 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-10-26 18:58:57,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 18:58:57,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-26 18:58:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:58:57,731 INFO L225 Difference]: With dead ends: 74 [2020-10-26 18:58:57,731 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 18:58:57,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 18:58:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 18:58:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-26 18:58:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 18:58:57,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-26 18:58:57,752 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2020-10-26 18:58:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:58:57,752 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-26 18:58:57,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 18:58:57,752 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-26 18:58:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 18:58:57,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:58:57,759 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:58:57,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 18:58:57,759 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:58:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:58:57,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1551267223, now seen corresponding path program 3 times [2020-10-26 18:58:57,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:58:57,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122280662] [2020-10-26 18:58:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:58:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:58:57,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:57,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:58:59,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:01,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:02,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:02,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 18:59:02,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:02,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 18:59:02,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:02,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 18:59:02,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:02,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 18:59:02,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:59:03,633 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-26 18:59:03,895 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2020-10-26 18:59:04,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:04,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:04,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:04,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:04,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:04,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:04,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:04,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:04,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:04,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:04,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:04,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 18:59:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:04,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:04,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:04,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:04,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:04,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:04,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:04,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:04,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:04,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:04,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-26 18:59:04,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122280662] [2020-10-26 18:59:04,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:04,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 18:59:04,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587339274] [2020-10-26 18:59:04,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 18:59:04,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:04,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 18:59:04,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-26 18:59:04,149 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 17 states. [2020-10-26 18:59:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:05,200 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-26 18:59:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 18:59:05,201 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-26 18:59:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:05,202 INFO L225 Difference]: With dead ends: 61 [2020-10-26 18:59:05,202 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 18:59:05,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-10-26 18:59:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 18:59:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-10-26 18:59:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 18:59:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-26 18:59:05,214 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 44 [2020-10-26 18:59:05,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:05,214 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-26 18:59:05,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 18:59:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-26 18:59:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 18:59:05,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:05,215 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:05,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 18:59:05,216 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:05,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:05,216 INFO L82 PathProgramCache]: Analyzing trace with hash 404321533, now seen corresponding path program 4 times [2020-10-26 18:59:05,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:05,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988852608] [2020-10-26 18:59:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:05,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:05,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:05,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:08,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:08,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 18:59:08,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:08,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2777 [2020-10-26 18:59:08,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:08,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 18:59:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 18:59:08,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:08,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:08,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:08,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:08,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:08,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:08,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:59:08,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:08,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:08,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:08,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:08,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:08,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 18:59:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:08,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:08,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:08,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:08,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:08,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:08,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:08,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:08,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:08,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:08,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:08,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 18:59:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:08,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:08,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:08,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:08,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:08,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:08,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:08,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:08,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:08,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:08,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-10-26 18:59:08,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988852608] [2020-10-26 18:59:08,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:08,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 18:59:08,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858384875] [2020-10-26 18:59:08,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 18:59:08,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:08,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 18:59:08,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 18:59:08,127 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 8 states. [2020-10-26 18:59:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:08,361 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-10-26 18:59:08,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 18:59:08,362 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-26 18:59:08,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:08,363 INFO L225 Difference]: With dead ends: 90 [2020-10-26 18:59:08,363 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 18:59:08,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-26 18:59:08,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 18:59:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2020-10-26 18:59:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 18:59:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-26 18:59:08,375 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2020-10-26 18:59:08,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:08,375 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-26 18:59:08,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 18:59:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-26 18:59:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 18:59:08,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:08,376 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:08,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 18:59:08,377 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash 570617951, now seen corresponding path program 5 times [2020-10-26 18:59:08,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:08,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680914119] [2020-10-26 18:59:08,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:08,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:08,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:09,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:10,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:13,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:13,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 18:59:13,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:13,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 18:59:13,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:13,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 18:59:13,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:13,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 18:59:13,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:14,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:14,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:14,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:14,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:14,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:14,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:14,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:14,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:14,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:14,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:14,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:14,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 18:59:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:14,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:14,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:14,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:14,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:14,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:14,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:14,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:14,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:14,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:14,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:14,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 18:59:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:14,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:14,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:14,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:14,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:14,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:14,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:14,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:14,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:14,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:14,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 61 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 18:59:14,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680914119] [2020-10-26 18:59:14,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:14,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 18:59:14,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147602323] [2020-10-26 18:59:14,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 18:59:14,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:14,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 18:59:14,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-26 18:59:14,885 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 20 states. [2020-10-26 18:59:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:16,207 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-26 18:59:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 18:59:16,208 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-10-26 18:59:16,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:16,209 INFO L225 Difference]: With dead ends: 71 [2020-10-26 18:59:16,209 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 18:59:16,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2020-10-26 18:59:16,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 18:59:16,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-26 18:59:16,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 18:59:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-26 18:59:16,242 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 54 [2020-10-26 18:59:16,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:16,242 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-26 18:59:16,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 18:59:16,242 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-26 18:59:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 18:59:16,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:16,244 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:16,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 18:59:16,246 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:16,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:16,247 INFO L82 PathProgramCache]: Analyzing trace with hash 67282885, now seen corresponding path program 6 times [2020-10-26 18:59:16,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:16,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126420474] [2020-10-26 18:59:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:16,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:16,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:16,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:19,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:19,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 18:59:19,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:19,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2922 [2020-10-26 18:59:19,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:19,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 18:59:19,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:19,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 18:59:19,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:19,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:19,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:19,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:19,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:19,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:19,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:19,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:19,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:19,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:19,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:19,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:19,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 18:59:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:19,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:19,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:19,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:19,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:19,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:19,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:19,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:19,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:19,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:19,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:19,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 18:59:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:19,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:19,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:19,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:19,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:19,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 18:59:19,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:19,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:19,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:19,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:19,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:19,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 18:59:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:19,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:19,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:19,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:19,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:19,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:19,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:19,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:19,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:19,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:19,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-26 18:59:19,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126420474] [2020-10-26 18:59:19,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:19,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 18:59:19,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497599885] [2020-10-26 18:59:19,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 18:59:19,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:19,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 18:59:19,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 18:59:19,344 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 11 states. [2020-10-26 18:59:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:19,535 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-10-26 18:59:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 18:59:19,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-26 18:59:19,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:19,536 INFO L225 Difference]: With dead ends: 112 [2020-10-26 18:59:19,536 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 18:59:19,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 18:59:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 18:59:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-26 18:59:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 18:59:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-26 18:59:19,549 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2020-10-26 18:59:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:19,549 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-26 18:59:19,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 18:59:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-26 18:59:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 18:59:19,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:19,550 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:19,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 18:59:19,551 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:19,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:19,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1549330535, now seen corresponding path program 7 times [2020-10-26 18:59:19,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:19,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066634071] [2020-10-26 18:59:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:19,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:19,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:19,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:22,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:22,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 18:59:22,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:22,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3395 [2020-10-26 18:59:22,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:22,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 18:59:22,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:22,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 18:59:22,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:23,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:23,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:23,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:23,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:23,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:23,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 18:59:23,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:23,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:23,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:23,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:23,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:23,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 18:59:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:23,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:23,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:23,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:23,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:23,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:23,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:23,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:23,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:23,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:23,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:23,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 18:59:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:23,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:23,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:23,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:23,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:23,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:23,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:23,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:23,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:23,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:23,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:23,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 18:59:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:23,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:23,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:23,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:23,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:23,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:23,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:23,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:23,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:23,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:23,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-26 18:59:23,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066634071] [2020-10-26 18:59:23,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:23,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 18:59:23,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641789776] [2020-10-26 18:59:23,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 18:59:23,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:23,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 18:59:23,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 18:59:23,150 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 12 states. [2020-10-26 18:59:23,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:23,323 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2020-10-26 18:59:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 18:59:23,325 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2020-10-26 18:59:23,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:23,326 INFO L225 Difference]: With dead ends: 114 [2020-10-26 18:59:23,326 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 18:59:23,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 18:59:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 18:59:23,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 18:59:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 18:59:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-26 18:59:23,352 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2020-10-26 18:59:23,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:23,352 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-26 18:59:23,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 18:59:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-26 18:59:23,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 18:59:23,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:23,354 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:23,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 18:59:23,354 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:23,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:23,358 INFO L82 PathProgramCache]: Analyzing trace with hash -132020087, now seen corresponding path program 8 times [2020-10-26 18:59:23,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:23,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390281987] [2020-10-26 18:59:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:23,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:23,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:23,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:27,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 18:59:27,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:27,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4064 [2020-10-26 18:59:27,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:27,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 18:59:27,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:27,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 18:59:27,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:27,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:27,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:27,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:27,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:27,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:27,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:27,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:27,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:27,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:27,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:27,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 18:59:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:27,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:27,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:27,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:27,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:27,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:27,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:27,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:27,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:27,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:27,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 18:59:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:27,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:27,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:27,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:27,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:27,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:27,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:27,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:27,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 18:59:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:27,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:27,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:27,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:27,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:27,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:27,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:27,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:27,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:27,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:27,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-26 18:59:27,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390281987] [2020-10-26 18:59:27,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:27,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 18:59:27,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163583073] [2020-10-26 18:59:27,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 18:59:27,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:27,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 18:59:27,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-26 18:59:27,566 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 9 states. [2020-10-26 18:59:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:27,902 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-10-26 18:59:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 18:59:27,903 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-10-26 18:59:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:27,904 INFO L225 Difference]: With dead ends: 112 [2020-10-26 18:59:27,905 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 18:59:27,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-26 18:59:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 18:59:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2020-10-26 18:59:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 18:59:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-26 18:59:27,920 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2020-10-26 18:59:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:27,921 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-26 18:59:27,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 18:59:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-26 18:59:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 18:59:27,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:27,922 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:27,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 18:59:27,923 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:27,923 INFO L82 PathProgramCache]: Analyzing trace with hash -939224981, now seen corresponding path program 9 times [2020-10-26 18:59:27,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:27,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553733239] [2020-10-26 18:59:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:27,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:29,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:29,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:31,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:33,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:33,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 18:59:33,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 18:59:33,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5288 [2020-10-26 18:59:33,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:33,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 18:59:33,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:33,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 18:59:33,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:33,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:33,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:33,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:33,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:33,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:33,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 18:59:33,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:33,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:33,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:33,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:33,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 18:59:33,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 18:59:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:33,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:33,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:33,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:33,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:33,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:33,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:33,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:33,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:33,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:33,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:33,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 18:59:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:33,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:33,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:33,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:33,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:33,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:33,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:33,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:33,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 18:59:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:33,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:33,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:33,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:33,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:33,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:33,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:33,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:33,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-10-26 18:59:33,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553733239] [2020-10-26 18:59:33,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:33,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 18:59:33,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730338486] [2020-10-26 18:59:33,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 18:59:33,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:33,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 18:59:33,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 18:59:33,384 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 10 states. [2020-10-26 18:59:33,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:33,689 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2020-10-26 18:59:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 18:59:33,690 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-10-26 18:59:33,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:33,691 INFO L225 Difference]: With dead ends: 118 [2020-10-26 18:59:33,691 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 18:59:33,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-26 18:59:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 18:59:33,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-10-26 18:59:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 18:59:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-26 18:59:33,704 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2020-10-26 18:59:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:33,705 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-26 18:59:33,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 18:59:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-26 18:59:33,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 18:59:33,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:33,713 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:33,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 18:59:33,713 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:33,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:33,713 INFO L82 PathProgramCache]: Analyzing trace with hash 725952461, now seen corresponding path program 10 times [2020-10-26 18:59:33,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:33,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019246678] [2020-10-26 18:59:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:33,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:33,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:36,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:38,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:38,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 18:59:38,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:38,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 18:59:38,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:38,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 18:59:38,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:38,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 18:59:38,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:38,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:38,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:38,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:38,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:38,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:38,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:38,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:38,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:38,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:38,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:38,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:38,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 18:59:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:38,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:38,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:38,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:38,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:38,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:38,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:38,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:38,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:38,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:38,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:38,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 18:59:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:38,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:38,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:38,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:38,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:38,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:38,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:38,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:38,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 18:59:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:38,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:38,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:38,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:38,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:38,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:38,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:38,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:38,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:38,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:38,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 6 proven. 81 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-26 18:59:38,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019246678] [2020-10-26 18:59:38,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:38,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 18:59:38,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671215436] [2020-10-26 18:59:38,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 18:59:38,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:38,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 18:59:38,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 18:59:38,925 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 13 states. [2020-10-26 18:59:39,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:39,134 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2020-10-26 18:59:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 18:59:39,135 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2020-10-26 18:59:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:39,135 INFO L225 Difference]: With dead ends: 124 [2020-10-26 18:59:39,136 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 18:59:39,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 18:59:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 18:59:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 18:59:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 18:59:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-26 18:59:39,152 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 70 [2020-10-26 18:59:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:39,153 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-26 18:59:39,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 18:59:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-26 18:59:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 18:59:39,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:39,154 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:39,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 18:59:39,154 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:39,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:39,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1129732497, now seen corresponding path program 11 times [2020-10-26 18:59:39,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:39,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478566161] [2020-10-26 18:59:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:39,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:39,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:42,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:44,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:44,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 18:59:44,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:44,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 18:59:44,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:44,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 18:59:44,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:44,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 18:59:44,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:44,586 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2020-10-26 18:59:44,839 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2020-10-26 18:59:44,981 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-10-26 18:59:45,124 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2020-10-26 18:59:45,325 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2020-10-26 18:59:45,521 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 36 [2020-10-26 18:59:45,703 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2020-10-26 18:59:45,942 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2020-10-26 18:59:46,203 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 37 [2020-10-26 18:59:46,371 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 30 [2020-10-26 18:59:46,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:46,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:46,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:46,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:46,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:46,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 18:59:46,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:46,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:46,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:46,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:46,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:46,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 18:59:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:46,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:46,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:46,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:46,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:46,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:46,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:46,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:46,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:46,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:46,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 18:59:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:46,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:46,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:46,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:46,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:46,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:46,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:46,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:46,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:46,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:46,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:46,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 18:59:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:46,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:46,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:46,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:46,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:46,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:46,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:46,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 18:59:46,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:46,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 18:59:46,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 6 proven. 124 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-26 18:59:46,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478566161] [2020-10-26 18:59:46,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:46,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 18:59:46,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794648259] [2020-10-26 18:59:46,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 18:59:46,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:46,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 18:59:46,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2020-10-26 18:59:46,772 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 23 states. [2020-10-26 18:59:48,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:48,269 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-26 18:59:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 18:59:48,270 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2020-10-26 18:59:48,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:48,272 INFO L225 Difference]: With dead ends: 88 [2020-10-26 18:59:48,272 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 18:59:48,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2020-10-26 18:59:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 18:59:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2020-10-26 18:59:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 18:59:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-26 18:59:48,287 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 72 [2020-10-26 18:59:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:48,287 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-26 18:59:48,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 18:59:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-26 18:59:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 18:59:48,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:48,288 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:48,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 18:59:48,289 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:48,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2082845227, now seen corresponding path program 12 times [2020-10-26 18:59:48,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:48,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398969775] [2020-10-26 18:59:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:48,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:48,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:52,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:55,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:55,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 18:59:55,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 18:59:55,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7626 [2020-10-26 18:59:55,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:55,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 18:59:55,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 18:59:55,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 18:59:55,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:56,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 18:59:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:56,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:56,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:56,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 18:59:56,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:56,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 18:59:56,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:56,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:56,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 18:59:56,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:56,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:56,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 18:59:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:56,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:56,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:56,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:56,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:56,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:56,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:56,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:56,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:56,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:56,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:56,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 18:59:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:56,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:56,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:56,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:56,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:56,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:56,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:56,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:56,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:56,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:56,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:56,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 18:59:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:56,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:56,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:56,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:56,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:56,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:56,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:56,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:56,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:56,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:56,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:56,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 18:59:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:56,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:56,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 18:59:56,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 18:59:56,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 18:59:56,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 18:59:56,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 18:59:56,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 18:59:56,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 18:59:56,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 18:59:56,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 18:59:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 8 proven. 100 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 18:59:56,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398969775] [2020-10-26 18:59:56,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 18:59:56,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 18:59:56,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65426796] [2020-10-26 18:59:56,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 18:59:56,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 18:59:56,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 18:59:56,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 18:59:56,142 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 14 states. [2020-10-26 18:59:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 18:59:56,255 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2020-10-26 18:59:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 18:59:56,256 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-10-26 18:59:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 18:59:56,257 INFO L225 Difference]: With dead ends: 142 [2020-10-26 18:59:56,257 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 18:59:56,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 18:59:56,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 18:59:56,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 18:59:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 18:59:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-26 18:59:56,270 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2020-10-26 18:59:56,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 18:59:56,271 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-26 18:59:56,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 18:59:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-26 18:59:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 18:59:56,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 18:59:56,272 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 18:59:56,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 18:59:56,272 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 18:59:56,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 18:59:56,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1894935031, now seen corresponding path program 13 times [2020-10-26 18:59:56,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 18:59:56,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913568191] [2020-10-26 18:59:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 18:59:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 18:59:56,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 18:59:56,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:00,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:01,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:01,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:00:01,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:00:01,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:00:01,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:01,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:00:01,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:01,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:00:01,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:01,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:01,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:01,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:01,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:01,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:01,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:01,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:01,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:01,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:01,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:00:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:01,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:01,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:01,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:01,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:01,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:01,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:01,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:01,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:01,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:01,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:01,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:00:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:01,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:01,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:01,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:01,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:01,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:01,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:01,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:01,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:01,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:01,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:01,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:00:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:01,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:01,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:01,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:01,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:01,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:01,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:01,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:01,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:01,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:01,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:01,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:00:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:01,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:01,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:01,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:01,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:01,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:01,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:01,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:01,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:01,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:01,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-26 19:00:01,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913568191] [2020-10-26 19:00:01,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:01,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:00:01,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786806166] [2020-10-26 19:00:01,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:00:01,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:01,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:00:01,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:00:01,465 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 11 states. [2020-10-26 19:00:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:01,853 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2020-10-26 19:00:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:00:01,856 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-10-26 19:00:01,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:01,857 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:00:01,857 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:00:01,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:00:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:00:01,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-26 19:00:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:00:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-26 19:00:01,870 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2020-10-26 19:00:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:01,870 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-26 19:00:01,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:00:01,871 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-26 19:00:01,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:00:01,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:01,872 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:01,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:00:01,872 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1096519129, now seen corresponding path program 14 times [2020-10-26 19:00:01,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:01,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385631276] [2020-10-26 19:00:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:01,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:01,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:05,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:11,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:00:11,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:00:11,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9281 [2020-10-26 19:00:11,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:00:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:11,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:00:11,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:11,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:11,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:11,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:11,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:11,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:11,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:11,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:11,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:11,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:11,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:11,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:00:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:11,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:11,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:11,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:11,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:11,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:11,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:11,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:11,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:11,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:11,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:00:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:11,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:11,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:11,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:11,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:11,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:11,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:11,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:11,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:11,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:11,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:00:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:11,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:11,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:11,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:11,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:11,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:11,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:11,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:11,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:11,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:11,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:00:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:11,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:11,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:11,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:11,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:11,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:11,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:11,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:11,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:11,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 8 proven. 121 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-26 19:00:11,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385631276] [2020-10-26 19:00:11,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:11,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:00:11,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615524760] [2020-10-26 19:00:11,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:00:11,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:11,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:00:11,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:00:11,382 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 15 states. [2020-10-26 19:00:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:11,635 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2020-10-26 19:00:11,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:00:11,637 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-10-26 19:00:11,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:11,638 INFO L225 Difference]: With dead ends: 148 [2020-10-26 19:00:11,638 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:00:11,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:00:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:00:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:00:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:00:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-26 19:00:11,659 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 84 [2020-10-26 19:00:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:11,660 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-26 19:00:11,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:00:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-26 19:00:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 19:00:11,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:11,668 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:11,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:00:11,669 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:11,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:11,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1860487419, now seen corresponding path program 15 times [2020-10-26 19:00:11,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:11,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461959986] [2020-10-26 19:00:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:11,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:11,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:16,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:16,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:00:16,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:16,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:00:16,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:16,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:00:16,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:16,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:00:16,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:16,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:16,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:16,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:16,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:16,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:16,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:00:16,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:16,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:16,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:16,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:16,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:16,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:00:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:16,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:16,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:16,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:16,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:16,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:16,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:16,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:16,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:16,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:16,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:16,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:00:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:16,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:16,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:16,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:16,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:16,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:16,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:16,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:16,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:16,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:16,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:16,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:00:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:16,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:16,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:16,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:16,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:16,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:16,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:16,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:16,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:16,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:16,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:16,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-26 19:00:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:16,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:16,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:16,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:16,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:16,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:16,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:16,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:16,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:16,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:16,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-26 19:00:16,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461959986] [2020-10-26 19:00:16,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:16,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:00:16,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698860389] [2020-10-26 19:00:16,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:00:16,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:16,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:00:16,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:00:16,873 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 12 states. [2020-10-26 19:00:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:17,362 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2020-10-26 19:00:17,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:00:17,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-10-26 19:00:17,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:17,364 INFO L225 Difference]: With dead ends: 148 [2020-10-26 19:00:17,364 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:00:17,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:00:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:00:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 91. [2020-10-26 19:00:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:00:17,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-26 19:00:17,379 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2020-10-26 19:00:17,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:17,380 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-26 19:00:17,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:00:17,380 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-26 19:00:17,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:00:17,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:17,381 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:17,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:00:17,381 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:17,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1942864931, now seen corresponding path program 16 times [2020-10-26 19:00:17,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:17,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427427665] [2020-10-26 19:00:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:17,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:17,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:22,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:22,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:00:22,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:22,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 19:00:22,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:22,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:00:22,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:22,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:00:22,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:22,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:22,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:22,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:22,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:22,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:22,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:22,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:22,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:22,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:22,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:22,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:22,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:00:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:22,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:22,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:22,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:22,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:22,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:22,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:22,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:22,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:22,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:22,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:22,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:00:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:22,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:22,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:22,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:22,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:22,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:22,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:22,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:22,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:22,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:22,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:22,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:00:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:22,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:22,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:22,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:22,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:22,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:22,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:22,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:22,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:22,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:22,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:22,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-26 19:00:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:22,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:22,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:22,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:22,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:22,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:22,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:22,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:22,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 8 proven. 144 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-26 19:00:22,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427427665] [2020-10-26 19:00:22,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:22,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:00:22,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747387578] [2020-10-26 19:00:22,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:00:22,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:22,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:00:22,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:00:22,688 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 16 states. [2020-10-26 19:00:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:22,942 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2020-10-26 19:00:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:00:22,943 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2020-10-26 19:00:22,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:22,944 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:00:22,944 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:00:22,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:00:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:00:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:00:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:00:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-26 19:00:22,958 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 88 [2020-10-26 19:00:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:22,958 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-26 19:00:22,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:00:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-26 19:00:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:00:22,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:22,959 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:22,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:00:22,960 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:22,960 INFO L82 PathProgramCache]: Analyzing trace with hash 243602943, now seen corresponding path program 17 times [2020-10-26 19:00:22,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:22,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761200197] [2020-10-26 19:00:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:22,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:23,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:27,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:27,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:00:27,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:27,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:00:27,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:27,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:00:27,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:27,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:00:27,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:28,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:28,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:28,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:28,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:28,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:28,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:28,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:28,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:28,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:28,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:28,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:28,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:00:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:28,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:28,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:28,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:28,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:28,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:28,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:28,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:28,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:28,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:28,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:28,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:00:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:28,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:28,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:28,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:28,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:28,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:28,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:28,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:28,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:28,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:28,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:28,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:00:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:28,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:28,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:28,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:28,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:28,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:28,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:28,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:28,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:28,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:00:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:28,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:28,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:28,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:28,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:28,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:28,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:28,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:28,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:28,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:28,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:00:28,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761200197] [2020-10-26 19:00:28,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:28,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:00:28,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60875159] [2020-10-26 19:00:28,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:00:28,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:28,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:00:28,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:00:28,176 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 13 states. [2020-10-26 19:00:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:28,686 INFO L93 Difference]: Finished difference Result 156 states and 163 transitions. [2020-10-26 19:00:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:00:28,687 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 90 [2020-10-26 19:00:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:28,689 INFO L225 Difference]: With dead ends: 156 [2020-10-26 19:00:28,689 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:00:28,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:00:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:00:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2020-10-26 19:00:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:00:28,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-26 19:00:28,703 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2020-10-26 19:00:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:28,703 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-26 19:00:28,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:00:28,703 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-26 19:00:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:00:28,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:28,704 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:28,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:00:28,705 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:28,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:28,705 INFO L82 PathProgramCache]: Analyzing trace with hash -990685215, now seen corresponding path program 18 times [2020-10-26 19:00:28,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:28,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421400539] [2020-10-26 19:00:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:28,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:28,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:33,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:33,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 19:00:33,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:33,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:00:33,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:33,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:00:33,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:33,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:00:33,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:33,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:33,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:33,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:33,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:33,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:33,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:33,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:33,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:33,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:00:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:33,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:33,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:33,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:33,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:33,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:33,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:33,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:33,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:33,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:33,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:33,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:00:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:33,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:33,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:33,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:33,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:33,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:33,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:33,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:33,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:34,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:34,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:34,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:00:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:34,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:34,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:34,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:34,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:34,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:34,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:34,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:34,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:34,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:34,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:34,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-26 19:00:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:34,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:34,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:34,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:34,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:34,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:34,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:34,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:34,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:34,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:34,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-10-26 19:00:34,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421400539] [2020-10-26 19:00:34,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:34,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:00:34,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563993564] [2020-10-26 19:00:34,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:00:34,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:34,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:00:34,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:00:34,021 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 17 states. [2020-10-26 19:00:34,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:34,237 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2020-10-26 19:00:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:00:34,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-10-26 19:00:34,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:34,239 INFO L225 Difference]: With dead ends: 160 [2020-10-26 19:00:34,239 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:00:34,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:00:34,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:00:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-26 19:00:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:00:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-10-26 19:00:34,253 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2020-10-26 19:00:34,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:34,253 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-10-26 19:00:34,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:00:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-10-26 19:00:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 19:00:34,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:34,254 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 9, 9, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:34,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:00:34,255 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:34,255 INFO L82 PathProgramCache]: Analyzing trace with hash -802664189, now seen corresponding path program 19 times [2020-10-26 19:00:34,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:34,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13774836] [2020-10-26 19:00:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:34,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:34,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:39,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:39,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:00:39,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:39,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:00:39,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:39,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:00:39,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:39,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:00:39,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:39,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:39,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:39,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:39,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:39,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:39,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:39,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:39,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:39,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:39,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:39,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:39,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:00:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:39,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:39,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:39,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:39,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:39,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:39,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:39,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:39,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:39,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:39,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:39,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:00:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:39,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:39,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:39,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:39,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:39,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:39,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:39,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:39,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:39,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:39,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:39,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-26 19:00:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:39,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:39,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:39,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:39,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:39,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:39,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:39,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:39,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:39,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:39,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:39,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-26 19:00:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:39,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:39,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:39,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:39,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:39,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:39,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:39,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:39,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:39,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:39,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 8 proven. 81 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-26 19:00:39,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13774836] [2020-10-26 19:00:39,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:39,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:00:39,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70787328] [2020-10-26 19:00:39,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:00:39,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:39,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:00:39,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:00:39,516 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 14 states. [2020-10-26 19:00:40,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:40,045 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2020-10-26 19:00:40,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:00:40,045 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 94 [2020-10-26 19:00:40,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:40,047 INFO L225 Difference]: With dead ends: 164 [2020-10-26 19:00:40,047 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:00:40,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:00:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:00:40,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-10-26 19:00:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:00:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-26 19:00:40,063 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 94 [2020-10-26 19:00:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:40,063 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-26 19:00:40,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:00:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-26 19:00:40,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-26 19:00:40,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:40,066 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:40,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:00:40,066 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:40,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:40,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1431051803, now seen corresponding path program 20 times [2020-10-26 19:00:40,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:40,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218166254] [2020-10-26 19:00:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:40,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:40,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:45,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:45,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:00:45,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:45,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:00:45,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:45,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:00:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:45,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:00:45,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:45,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:45,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:45,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:45,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:45,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:45,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:45,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:45,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:45,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:45,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:45,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:45,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:00:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:45,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:45,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:45,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:45,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:45,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:45,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:45,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:45,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:45,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:45,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:45,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:00:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:45,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:45,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:45,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:45,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:45,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:45,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:45,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:45,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:45,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:45,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-26 19:00:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:45,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:45,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:45,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:45,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:45,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:45,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:45,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:45,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:45,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:45,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:45,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:00:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:45,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:45,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:45,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:45,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:45,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:45,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:45,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:45,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:45,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:45,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 8 proven. 196 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-26 19:00:45,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218166254] [2020-10-26 19:00:45,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:45,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:00:45,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313799165] [2020-10-26 19:00:45,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:00:45,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:45,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:00:45,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:00:45,447 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 18 states. [2020-10-26 19:00:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:45,751 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2020-10-26 19:00:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:00:45,751 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2020-10-26 19:00:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:45,753 INFO L225 Difference]: With dead ends: 166 [2020-10-26 19:00:45,753 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:00:45,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:00:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:00:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-26 19:00:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:00:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-10-26 19:00:45,766 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 96 [2020-10-26 19:00:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:45,767 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-10-26 19:00:45,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:00:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-10-26 19:00:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:00:45,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:45,768 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:45,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:00:45,768 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:45,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1297909241, now seen corresponding path program 21 times [2020-10-26 19:00:45,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:45,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614702436] [2020-10-26 19:00:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:45,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:45,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:50,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:50,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 19:00:50,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:50,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:00:50,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:50,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:00:50,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:50,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:00:50,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:51,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:51,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:51,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:51,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:51,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:51,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:51,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:51,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:51,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:51,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:51,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:51,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:00:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:51,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:51,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:51,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:51,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:51,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:51,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:51,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:51,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:51,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:51,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:51,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:00:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:51,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:51,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:51,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:51,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:51,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:51,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:51,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:51,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:00:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:51,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:51,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:51,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:51,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:51,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:51,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:51,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:51,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:51,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:51,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:51,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-26 19:00:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:51,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:51,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:51,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:51,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:51,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:51,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:51,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:51,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 8 proven. 100 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2020-10-26 19:00:51,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614702436] [2020-10-26 19:00:51,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:51,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:00:51,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754474890] [2020-10-26 19:00:51,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:00:51,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:51,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:00:51,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:00:51,048 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 15 states. [2020-10-26 19:00:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:51,661 INFO L93 Difference]: Finished difference Result 172 states and 181 transitions. [2020-10-26 19:00:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:00:51,662 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2020-10-26 19:00:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:51,665 INFO L225 Difference]: With dead ends: 172 [2020-10-26 19:00:51,665 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:00:51,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:00:51,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:00:51,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 103. [2020-10-26 19:00:51,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:00:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2020-10-26 19:00:51,688 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2020-10-26 19:00:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:51,688 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2020-10-26 19:00:51,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:00:51,689 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2020-10-26 19:00:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 19:00:51,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:51,690 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:51,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:00:51,690 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:51,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:51,690 INFO L82 PathProgramCache]: Analyzing trace with hash -620176919, now seen corresponding path program 22 times [2020-10-26 19:00:51,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:51,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773341994] [2020-10-26 19:00:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:51,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:51,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:56,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:56,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 19:00:56,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:00:56,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:00:56,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:56,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:00:56,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:00:56,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:00:56,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:57,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:00:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:57,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:57,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:57,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:00:57,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:57,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:00:57,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:57,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:57,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:00:57,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:57,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:57,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:00:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:57,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:57,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:57,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:57,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:57,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:57,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:57,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:57,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:57,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:00:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:57,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:57,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:57,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:57,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:57,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:00:57,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:57,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:57,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:57,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:57,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:57,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-26 19:00:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:57,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:57,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:57,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:57,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:57,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:57,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:57,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:57,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:57,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:57,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:57,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 19:00:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:57,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:57,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:00:57,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:00:57,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:00:57,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:00:57,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:00:57,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:00:57,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:00:57,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:00:57,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:00:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 8 proven. 225 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-26 19:00:57,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773341994] [2020-10-26 19:00:57,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:00:57,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:00:57,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99218178] [2020-10-26 19:00:57,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:00:57,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:00:57,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:00:57,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:00:57,056 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 19 states. [2020-10-26 19:00:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:00:57,358 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2020-10-26 19:00:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:00:57,359 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 100 [2020-10-26 19:00:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:00:57,361 INFO L225 Difference]: With dead ends: 172 [2020-10-26 19:00:57,361 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:00:57,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:00:57,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:00:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-26 19:00:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:00:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-10-26 19:00:57,375 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2020-10-26 19:00:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:00:57,375 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-10-26 19:00:57,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:00:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-10-26 19:00:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:00:57,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:00:57,376 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 11, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:00:57,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:00:57,376 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:00:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:00:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1286893301, now seen corresponding path program 23 times [2020-10-26 19:00:57,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:00:57,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564750154] [2020-10-26 19:00:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:00:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:00:57,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:00:57,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:02,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:02,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:01:02,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:02,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 19:01:02,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:02,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:01:02,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:02,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:01:02,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:02,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:02,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:02,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:02,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:02,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:02,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:02,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:02,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:02,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:01:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:02,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:02,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:02,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:02,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:02,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:02,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:02,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:02,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:02,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:02,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:02,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-26 19:01:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:02,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:02,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:02,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:02,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:02,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:02,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:02,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:02,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:02,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:02,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:02,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-26 19:01:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:02,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:02,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:02,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:02,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:02,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:02,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:02,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:02,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 19:01:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:02,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:02,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:02,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:02,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:02,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:02,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:02,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:02,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:02,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:02,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 8 proven. 121 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-10-26 19:01:02,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564750154] [2020-10-26 19:01:02,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:02,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:01:02,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971158598] [2020-10-26 19:01:02,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:01:02,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:02,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:01:02,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:01:02,701 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 16 states. [2020-10-26 19:01:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:03,391 INFO L93 Difference]: Finished difference Result 180 states and 190 transitions. [2020-10-26 19:01:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:01:03,392 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 102 [2020-10-26 19:01:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:03,394 INFO L225 Difference]: With dead ends: 180 [2020-10-26 19:01:03,394 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:01:03,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:01:03,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:01:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 107. [2020-10-26 19:01:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:01:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2020-10-26 19:01:03,408 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 102 [2020-10-26 19:01:03,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:03,408 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2020-10-26 19:01:03,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:01:03,408 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2020-10-26 19:01:03,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 19:01:03,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:03,409 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 12, 12, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:03,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:01:03,409 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:03,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1376206829, now seen corresponding path program 24 times [2020-10-26 19:01:03,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:03,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339109264] [2020-10-26 19:01:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:03,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:03,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:08,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:08,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 19:01:08,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:08,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5504 [2020-10-26 19:01:08,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:01:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:08,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:01:08,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:09,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:09,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:09,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:09,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:09,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:09,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:09,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:09,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:09,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:09,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:09,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:09,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:01:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:09,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:09,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:09,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:09,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:09,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:01:09,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:09,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:09,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-26 19:01:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:09,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:09,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:09,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:09,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:09,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:01:09,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:09,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:09,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:09,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:09,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:09,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:01:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:09,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:09,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:09,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:09,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:09,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:01:09,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:09,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:09,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-26 19:01:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:09,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:09,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:09,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:09,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:09,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:01:09,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:09,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:09,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:09,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:09,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 8 proven. 144 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-10-26 19:01:09,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339109264] [2020-10-26 19:01:09,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:09,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:01:09,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225255990] [2020-10-26 19:01:09,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:01:09,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:09,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:01:09,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:01:09,223 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 17 states. [2020-10-26 19:01:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:10,010 INFO L93 Difference]: Finished difference Result 186 states and 197 transitions. [2020-10-26 19:01:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:01:10,011 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 104 [2020-10-26 19:01:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:10,013 INFO L225 Difference]: With dead ends: 186 [2020-10-26 19:01:10,013 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:01:10,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:01:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:01:10,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 109. [2020-10-26 19:01:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:01:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2020-10-26 19:01:10,027 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2020-10-26 19:01:10,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:10,027 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2020-10-26 19:01:10,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:01:10,028 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2020-10-26 19:01:10,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:01:10,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:10,028 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 13, 13, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:10,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:01:10,029 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:10,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:10,029 INFO L82 PathProgramCache]: Analyzing trace with hash 814923343, now seen corresponding path program 25 times [2020-10-26 19:01:10,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:10,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255945523] [2020-10-26 19:01:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:10,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:10,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:15,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:15,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-26 19:01:15,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:15,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:01:15,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:15,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:01:15,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:15,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:01:15,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:15,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:15,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:15,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:15,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:15,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:15,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:01:15,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:15,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:15,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:15,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:15,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:15,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:01:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:15,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:15,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:15,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:15,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:15,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:15,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:15,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:15,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:15,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:01:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:15,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:15,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:15,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:15,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:15,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:15,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:15,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:15,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:15,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:15,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:15,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-26 19:01:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:15,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:15,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:15,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:15,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:15,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:15,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:15,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:15,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:15,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:15,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:15,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-26 19:01:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:15,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:15,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:15,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:15,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:15,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:15,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:15,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:15,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:15,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:15,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 8 proven. 256 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:01:15,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255945523] [2020-10-26 19:01:15,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:15,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:01:15,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201234567] [2020-10-26 19:01:15,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:01:15,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:15,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:01:15,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:01:15,437 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 20 states. [2020-10-26 19:01:15,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:15,766 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2020-10-26 19:01:15,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:01:15,767 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 106 [2020-10-26 19:01:15,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:15,768 INFO L225 Difference]: With dead ends: 182 [2020-10-26 19:01:15,768 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:01:15,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:01:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:01:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-26 19:01:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:01:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-10-26 19:01:15,786 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 106 [2020-10-26 19:01:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:15,786 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-10-26 19:01:15,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:01:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-10-26 19:01:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 19:01:15,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:15,791 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 13, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:15,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:01:15,792 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:15,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:15,793 INFO L82 PathProgramCache]: Analyzing trace with hash -364637199, now seen corresponding path program 26 times [2020-10-26 19:01:15,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:15,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826108307] [2020-10-26 19:01:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:15,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:15,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:20,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:20,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-26 19:01:20,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:20,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5168 [2020-10-26 19:01:20,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:20,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:01:20,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:20,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:01:20,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:21,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:21,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:21,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:21,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:21,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:21,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:21,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:21,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:21,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:21,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:21,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:21,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:01:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:21,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:21,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:21,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:21,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:21,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:21,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:21,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:21,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:21,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:21,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:21,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-26 19:01:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:21,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:21,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:21,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:21,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:21,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:01:21,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:21,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:21,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 19:01:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:21,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:21,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:21,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:21,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:21,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:21,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:21,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:21,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:21,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:21,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:21,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-26 19:01:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:21,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:21,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:21,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:21,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:21,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:21,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:21,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:21,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:21,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:21,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 8 proven. 289 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:01:21,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826108307] [2020-10-26 19:01:21,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:21,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:01:21,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641368207] [2020-10-26 19:01:21,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:01:21,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:21,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:01:21,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:01:21,413 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 21 states. [2020-10-26 19:01:21,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:21,737 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2020-10-26 19:01:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:01:21,738 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 108 [2020-10-26 19:01:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:21,739 INFO L225 Difference]: With dead ends: 184 [2020-10-26 19:01:21,740 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:01:21,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:01:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:01:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-26 19:01:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:01:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-10-26 19:01:21,751 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 108 [2020-10-26 19:01:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:21,752 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-10-26 19:01:21,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:01:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-10-26 19:01:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-26 19:01:21,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:21,753 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:21,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:01:21,753 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash -50951917, now seen corresponding path program 27 times [2020-10-26 19:01:21,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:21,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726041680] [2020-10-26 19:01:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:21,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:21,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:26,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:26,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:01:26,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:26,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-26 19:01:26,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:26,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:01:26,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:26,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:01:26,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:27,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:27,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:27,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:27,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:27,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:27,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:01:27,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:27,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:27,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:27,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:27,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:27,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-26 19:01:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:27,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:27,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:27,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:27,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:27,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:27,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:27,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:27,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:27,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-26 19:01:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:27,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:27,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:27,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:27,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:27,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:27,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:27,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:27,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:27,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:27,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:27,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 19:01:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:27,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:27,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:27,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:27,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:27,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:27,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:27,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:27,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:27,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:27,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:27,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-26 19:01:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:27,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:27,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:27,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:27,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:27,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:27,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:27,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:27,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:27,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:27,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 8 proven. 324 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:01:27,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726041680] [2020-10-26 19:01:27,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:27,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:01:27,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640746498] [2020-10-26 19:01:27,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:01:27,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:27,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:01:27,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:01:27,324 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 22 states. [2020-10-26 19:01:27,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:27,629 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2020-10-26 19:01:27,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:01:27,630 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 110 [2020-10-26 19:01:27,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:27,632 INFO L225 Difference]: With dead ends: 186 [2020-10-26 19:01:27,632 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:01:27,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:01:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:01:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-26 19:01:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-26 19:01:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-10-26 19:01:27,648 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2020-10-26 19:01:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:27,648 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-10-26 19:01:27,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:01:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-10-26 19:01:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:01:27,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:27,650 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 13, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:27,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:01:27,650 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:27,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:27,650 INFO L82 PathProgramCache]: Analyzing trace with hash 752893365, now seen corresponding path program 28 times [2020-10-26 19:01:27,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:27,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130158648] [2020-10-26 19:01:27,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:27,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:29,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:32,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:32,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 19:01:32,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:32,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:01:32,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:32,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:01:32,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:32,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:01:32,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:33,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:33,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:33,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:33,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:33,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:33,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:33,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:33,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:33,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:33,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:33,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:33,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-26 19:01:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:33,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:33,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:33,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:33,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:33,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:33,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:33,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:33,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:33,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:33,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:33,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:01:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:33,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:33,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:33,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:33,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:33,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:33,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:33,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:33,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:33,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-26 19:01:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:33,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:33,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:33,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:33,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:33,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:33,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:33,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:33,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:33,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:33,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:33,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-26 19:01:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:33,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:33,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:33,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:33,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:33,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:33,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:33,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:33,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:33,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:33,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 8 proven. 361 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:01:33,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130158648] [2020-10-26 19:01:33,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:33,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:01:33,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438982087] [2020-10-26 19:01:33,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:01:33,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:33,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:01:33,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:01:33,247 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 23 states. [2020-10-26 19:01:33,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:33,569 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2020-10-26 19:01:33,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:01:33,570 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-10-26 19:01:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:33,571 INFO L225 Difference]: With dead ends: 188 [2020-10-26 19:01:33,571 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:01:33,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:01:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:01:33,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-26 19:01:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:01:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2020-10-26 19:01:33,585 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 112 [2020-10-26 19:01:33,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:33,586 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2020-10-26 19:01:33,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:01:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2020-10-26 19:01:33,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 19:01:33,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:33,587 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:33,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:01:33,587 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:33,587 INFO L82 PathProgramCache]: Analyzing trace with hash 154096087, now seen corresponding path program 29 times [2020-10-26 19:01:33,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:33,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051207618] [2020-10-26 19:01:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:33,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:33,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:38,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:38,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 19:01:38,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:38,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:01:38,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:38,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:01:38,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:38,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:01:38,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:39,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:39,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:39,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:39,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:39,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:39,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:01:39,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:39,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:39,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:39,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:39,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:39,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:01:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:39,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:39,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:39,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:39,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:39,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:39,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:39,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:39,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:39,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:39,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:39,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-26 19:01:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:39,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:39,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:39,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:39,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:39,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:39,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:39,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:39,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-26 19:01:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:39,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:39,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:39,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:39,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:39,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:39,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:39,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:39,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:39,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:39,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:39,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 19:01:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:39,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:39,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:39,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:39,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:39,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:01:39,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:39,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 8 proven. 400 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:01:39,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051207618] [2020-10-26 19:01:39,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:39,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:01:39,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676052434] [2020-10-26 19:01:39,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:01:39,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:39,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:01:39,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:01:39,172 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 24 states. [2020-10-26 19:01:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:39,545 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2020-10-26 19:01:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:01:39,546 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 114 [2020-10-26 19:01:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:39,547 INFO L225 Difference]: With dead ends: 190 [2020-10-26 19:01:39,548 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:01:39,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:01:39,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:01:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-26 19:01:39,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:01:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-10-26 19:01:39,564 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2020-10-26 19:01:39,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:39,564 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-10-26 19:01:39,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:01:39,564 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-10-26 19:01:39,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-26 19:01:39,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:39,565 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 13, 13, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:39,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:01:39,565 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:39,566 INFO L82 PathProgramCache]: Analyzing trace with hash 235529593, now seen corresponding path program 30 times [2020-10-26 19:01:39,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:39,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342843579] [2020-10-26 19:01:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:39,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:39,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:44,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:44,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-26 19:01:44,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:44,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-26 19:01:44,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:44,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:01:44,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:44,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:01:44,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:45,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:45,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:45,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:45,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:45,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:45,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:45,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:45,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:45,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:45,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:45,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:45,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-26 19:01:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:45,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:45,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:45,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:45,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:45,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:45,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:45,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:45,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:45,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:45,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:45,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 19:01:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:45,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:45,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:45,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:45,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:45,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:45,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:45,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:45,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-26 19:01:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:45,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:45,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:45,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:45,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:45,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:45,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:45,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:45,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:45,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:45,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:45,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 19:01:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:45,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:45,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:45,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:45,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:45,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:45,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:45,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 8 proven. 441 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:01:45,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342843579] [2020-10-26 19:01:45,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:45,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:01:45,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222993448] [2020-10-26 19:01:45,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:01:45,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:45,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:01:45,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:01:45,213 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 25 states. [2020-10-26 19:01:45,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:45,519 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2020-10-26 19:01:45,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:01:45,520 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-10-26 19:01:45,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:45,521 INFO L225 Difference]: With dead ends: 192 [2020-10-26 19:01:45,521 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:01:45,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:01:45,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:01:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-26 19:01:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-26 19:01:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2020-10-26 19:01:45,536 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2020-10-26 19:01:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:45,536 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2020-10-26 19:01:45,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:01:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2020-10-26 19:01:45,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-26 19:01:45,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:45,537 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 13, 13, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:45,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:01:45,538 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:45,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1183717531, now seen corresponding path program 31 times [2020-10-26 19:01:45,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:45,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625333248] [2020-10-26 19:01:45,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:45,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:46,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:50,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:50,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-26 19:01:50,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:50,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:01:50,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:01:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:50,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:01:50,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:51,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:51,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:51,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:51,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:51,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:51,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:51,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:51,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:51,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:51,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:51,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:51,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-26 19:01:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:51,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:51,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:51,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:51,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:51,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:51,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:51,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:51,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 19:01:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:51,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:51,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:51,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:51,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:51,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:51,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:51,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:51,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:51,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:51,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:51,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-26 19:01:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:51,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:51,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:51,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:51,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:51,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:51,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:51,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:51,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-26 19:01:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:51,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:51,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:51,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:51,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:51,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:01:51,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:51,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:51,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 8 proven. 484 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:01:51,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625333248] [2020-10-26 19:01:51,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:51,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:01:51,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812379978] [2020-10-26 19:01:51,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:01:51,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:51,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:01:51,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:01:51,172 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 26 states. [2020-10-26 19:01:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:51,420 INFO L93 Difference]: Finished difference Result 194 states and 198 transitions. [2020-10-26 19:01:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:01:51,421 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-10-26 19:01:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:51,422 INFO L225 Difference]: With dead ends: 194 [2020-10-26 19:01:51,422 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:01:51,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:01:51,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:01:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-26 19:01:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:01:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-10-26 19:01:51,438 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 118 [2020-10-26 19:01:51,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:51,438 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-10-26 19:01:51,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:01:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-10-26 19:01:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-26 19:01:51,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:51,439 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 13, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:51,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:01:51,440 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:51,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:51,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1859259197, now seen corresponding path program 32 times [2020-10-26 19:01:51,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:51,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576890497] [2020-10-26 19:01:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:51,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:51,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:56,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:56,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 19:01:56,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:01:56,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 19:01:56,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:01:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:01:56,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:01:56,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:56,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:01:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:56,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:56,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:56,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:01:56,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:56,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:01:56,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:56,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:56,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:01:56,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:56,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:56,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:01:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:56,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:56,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:56,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:56,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:56,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:01:56,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:56,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:56,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:56,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:56,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:56,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-26 19:01:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:56,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:56,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:56,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:56,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:56,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:01:56,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:56,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:56,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:56,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:56,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:56,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-26 19:01:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:56,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:56,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:56,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:56,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:56,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:01:56,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:56,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:56,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:56,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:56,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:56,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-26 19:01:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:56,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:56,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:01:56,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:01:56,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:01:56,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:01:56,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:01:56,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:01:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:01:56,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:01:56,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:01:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2020-10-26 19:01:56,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576890497] [2020-10-26 19:01:56,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:01:56,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:01:56,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044254146] [2020-10-26 19:01:56,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:01:56,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:01:56,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:01:56,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:01:56,820 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 18 states. [2020-10-26 19:01:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:01:57,680 INFO L93 Difference]: Finished difference Result 206 states and 218 transitions. [2020-10-26 19:01:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:01:57,681 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2020-10-26 19:01:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:01:57,683 INFO L225 Difference]: With dead ends: 206 [2020-10-26 19:01:57,683 INFO L226 Difference]: Without dead ends: 164 [2020-10-26 19:01:57,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:01:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-26 19:01:57,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 125. [2020-10-26 19:01:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-26 19:01:57,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2020-10-26 19:01:57,716 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 120 [2020-10-26 19:01:57,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:01:57,716 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2020-10-26 19:01:57,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:01:57,716 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2020-10-26 19:01:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:01:57,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:01:57,717 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 14, 14, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:01:57,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:01:57,718 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:01:57,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:01:57,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1171781023, now seen corresponding path program 33 times [2020-10-26 19:01:57,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:01:57,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251727117] [2020-10-26 19:01:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:01:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:01:57,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:01:57,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:02,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:02,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-26 19:02:02,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:02,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:02:02,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:02:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:02,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:02:02,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:03,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:03,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:03,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:03,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:03,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:03,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:02:03,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:03,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:03,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:03,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:03,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:03,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-26 19:02:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:03,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:03,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:03,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:03,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:03,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:03,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:03,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:03,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:02:03,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:03,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:03,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-26 19:02:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:03,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:03,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:03,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:03,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:03,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:03,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:03,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:03,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:02:03,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:03,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:03,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 19:02:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:03,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:03,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:03,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:03,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:03,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:03,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:03,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:03,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:02:03,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:03,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:03,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-26 19:02:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:03,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:03,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:03,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:03,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:03,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:03,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:03,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:03,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:02:03,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:03,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 8 proven. 196 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2020-10-26 19:02:03,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251727117] [2020-10-26 19:02:03,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:03,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:02:03,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080367123] [2020-10-26 19:02:03,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:02:03,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:02:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:02:03,159 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 19 states. [2020-10-26 19:02:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:04,072 INFO L93 Difference]: Finished difference Result 212 states and 225 transitions. [2020-10-26 19:02:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:02:04,073 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 122 [2020-10-26 19:02:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:04,074 INFO L225 Difference]: With dead ends: 212 [2020-10-26 19:02:04,074 INFO L226 Difference]: Without dead ends: 170 [2020-10-26 19:02:04,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:02:04,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-26 19:02:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 127. [2020-10-26 19:02:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-26 19:02:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-10-26 19:02:04,098 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2020-10-26 19:02:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:04,098 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-10-26 19:02:04,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:02:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-10-26 19:02:04,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-26 19:02:04,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:04,099 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 15, 15, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:04,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:02:04,100 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:04,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:04,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1930219393, now seen corresponding path program 34 times [2020-10-26 19:02:04,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:04,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97723763] [2020-10-26 19:02:04,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:04,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:04,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-26 19:02:09,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:09,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:02:09,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:02:09,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:09,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:02:09,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:09,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:09,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:09,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:02:09,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:09,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:09,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:09,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 19:02:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:09,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:09,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:09,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:09,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:09,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:02:09,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:09,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-26 19:02:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:09,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:09,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:09,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:02:09,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:09,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:02:09,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:09,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 19:02:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:09,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:09,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:09,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:09,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:09,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:02:09,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:09,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-26 19:02:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:09,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:09,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:09,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:09,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:09,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:09,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:09,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:09,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:02:09,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:09,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 8 proven. 225 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2020-10-26 19:02:09,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97723763] [2020-10-26 19:02:09,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:09,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:02:09,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426407206] [2020-10-26 19:02:09,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:02:09,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:09,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:02:09,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:02:09,559 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 20 states. [2020-10-26 19:02:10,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:10,630 INFO L93 Difference]: Finished difference Result 218 states and 232 transitions. [2020-10-26 19:02:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:02:10,631 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 124 [2020-10-26 19:02:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:10,633 INFO L225 Difference]: With dead ends: 218 [2020-10-26 19:02:10,633 INFO L226 Difference]: Without dead ends: 176 [2020-10-26 19:02:10,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:02:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-26 19:02:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 129. [2020-10-26 19:02:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-26 19:02:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2020-10-26 19:02:10,651 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 124 [2020-10-26 19:02:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:10,652 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2020-10-26 19:02:10,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:02:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2020-10-26 19:02:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-26 19:02:10,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:10,653 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 16, 16, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:10,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:02:10,653 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:10,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:10,654 INFO L82 PathProgramCache]: Analyzing trace with hash 645052643, now seen corresponding path program 35 times [2020-10-26 19:02:10,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:10,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610816264] [2020-10-26 19:02:10,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:10,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:10,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:15,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:15,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-26 19:02:15,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:02:15,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 19:02:15,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:02:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:02:15,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:02:15,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:16,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:02:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:02:16,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:16,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:02:16,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:16,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:02:16,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:16,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:16,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 19:02:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:16,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:16,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:16,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:16,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:02:16,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:16,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:16,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-26 19:02:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:16,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:16,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:16,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:16,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:02:16,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:16,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:16,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-26 19:02:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:16,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:16,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:16,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:16,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:02:16,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:16,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:16,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-10-26 19:02:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:02:16,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:02:16,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:02:16,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:02:16,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:02:16,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:02:16,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:02:16,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:02:16,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:02:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 8 proven. 529 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-10-26 19:02:16,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610816264] [2020-10-26 19:02:16,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:02:16,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:02:16,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45923722] [2020-10-26 19:02:16,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:02:16,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:02:16,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:02:16,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:02:16,407 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 27 states. [2020-10-26 19:02:16,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:02:16,831 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2020-10-26 19:02:16,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:02:16,832 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 126 [2020-10-26 19:02:16,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:02:16,834 INFO L225 Difference]: With dead ends: 208 [2020-10-26 19:02:16,834 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:02:16,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:02:16,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:02:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-26 19:02:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-26 19:02:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2020-10-26 19:02:16,851 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 126 [2020-10-26 19:02:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:02:16,851 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2020-10-26 19:02:16,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:02:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2020-10-26 19:02:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-26 19:02:16,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:02:16,852 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 16, 16, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:02:16,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:02:16,853 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:02:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:02:16,853 INFO L82 PathProgramCache]: Analyzing trace with hash -537728635, now seen corresponding path program 36 times [2020-10-26 19:02:16,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:02:16,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530935611] [2020-10-26 19:02:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:02:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:02:16,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:02:16,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking...