/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:06:59,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:06:59,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:06:59,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:06:59,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:06:59,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:06:59,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:06:59,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:06:59,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:06:59,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:06:59,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:06:59,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:06:59,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:06:59,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:06:59,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:06:59,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:06:59,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:06:59,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:06:59,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:06:59,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:06:59,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:06:59,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:06:59,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:06:59,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:06:59,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:06:59,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:06:59,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:06:59,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:06:59,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:06:59,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:06:59,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:06:59,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:06:59,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:06:59,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:06:59,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:06:59,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:06:59,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:06:59,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:06:59,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:06:59,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:06:59,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:06:59,356 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 [2020-09-25 02:06:59,403 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:06:59,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:06:59,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:06:59,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:06:59,406 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:06:59,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:06:59,406 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:06:59,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:06:59,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:06:59,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:06:59,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:06:59,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:06:59,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:06:59,409 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:06:59,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:06:59,410 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:06:59,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:06:59,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:06:59,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:06:59,410 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:06:59,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:06:59,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:06:59,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:06:59,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:06:59,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:06:59,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:06:59,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:06:59,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:06:59,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:06:59,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=NARROWEST;log-additional-information=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=NARROWEST;log-additional-information=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=NARROWEST;log-additional-information=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=NARROWEST;log-additional-information=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=NARROWEST;log-additional-information=true; [2020-09-25 02:06:59,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:06:59,977 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:06:59,982 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:06:59,984 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:06:59,984 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:06:59,985 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-25 02:07:00,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd362a3bc/001c79ad3aea4a03ac3f9ee9f7a6f5a2/FLAG1a054a144 [2020-09-25 02:07:00,639 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:07:00,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-25 02:07:00,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd362a3bc/001c79ad3aea4a03ac3f9ee9f7a6f5a2/FLAG1a054a144 [2020-09-25 02:07:00,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd362a3bc/001c79ad3aea4a03ac3f9ee9f7a6f5a2 [2020-09-25 02:07:00,988 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:07:00,997 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:07:01,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:07:01,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:07:01,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:07:01,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:07:00" (1/1) ... [2020-09-25 02:07:01,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e0ef97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01, skipping insertion in model container [2020-09-25 02:07:01,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:07:00" (1/1) ... [2020-09-25 02:07:01,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:07:01,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:07:01,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:07:01,302 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:07:01,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:07:01,345 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:07:01,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01 WrapperNode [2020-09-25 02:07:01,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:07:01,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:07:01,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:07:01,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:07:01,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (1/1) ... [2020-09-25 02:07:01,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:07:01,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:07:01,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:07:01,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:07:01,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (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 [2020-09-25 02:07:01,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:07:01,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:07:01,582 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 02:07:01,582 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:07:01,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:07:01,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 02:07:01,583 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 02:07:01,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 02:07:01,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:07:01,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 02:07:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 02:07:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 02:07:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:07:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:07:01,973 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:07:01,974 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 02:07:01,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:07:01 BoogieIcfgContainer [2020-09-25 02:07:01,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:07:01,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:07:01,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:07:01,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:07:01,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:07:00" (1/3) ... [2020-09-25 02:07:01,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71525bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:07:01, skipping insertion in model container [2020-09-25 02:07:01,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:07:01" (2/3) ... [2020-09-25 02:07:01,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71525bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:07:01, skipping insertion in model container [2020-09-25 02:07:01,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:07:01" (3/3) ... [2020-09-25 02:07:01,990 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-09-25 02:07:02,001 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:07:02,012 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:07:02,031 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:07:02,058 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:07:02,058 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:07:02,058 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:07:02,058 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:07:02,058 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:07:02,058 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:07:02,058 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:07:02,058 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:07:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-09-25 02:07:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 02:07:02,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:02,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:02,090 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:02,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:02,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2031307650, now seen corresponding path program 1 times [2020-09-25 02:07:02,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:02,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240201650] [2020-09-25 02:07:02,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:02,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:02,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:02,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:02,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 02:07:02,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:07:02,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-09-25 02:07:02,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:02,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:02,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 02:07:02,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:02,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:07:02,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:02,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:02,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:02,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:02,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:02,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 02:07:02,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:02,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:02,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:02,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:02,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:07:02,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-25 02:07:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:02,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:02,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:02,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:02,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:02,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 02:07:02,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:02,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:02,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:02,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:02,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:02,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240201650] [2020-09-25 02:07:02,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:07:02,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 02:07:02,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741767918] [2020-09-25 02:07:02,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 02:07:02,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:02,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 02:07:02,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:07:02,693 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-09-25 02:07:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:02,871 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-09-25 02:07:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 02:07:02,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-25 02:07:02,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:02,887 INFO L225 Difference]: With dead ends: 102 [2020-09-25 02:07:02,887 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 02:07:02,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:07:02,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 02:07:02,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-25 02:07:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-25 02:07:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-09-25 02:07:02,948 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2020-09-25 02:07:02,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:02,949 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-09-25 02:07:02,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 02:07:02,949 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-09-25 02:07:02,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 02:07:02,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:02,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:02,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:07:02,952 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash 897550373, now seen corresponding path program 1 times [2020-09-25 02:07:02,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:02,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356037012] [2020-09-25 02:07:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:02,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:03,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:03,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 02:07:03,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:03,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-09-25 02:07:03,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:03,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:07:03,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:03,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 02:07:03,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:03,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:03,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:03,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:03,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:03,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:03,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 02:07:03,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:03,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:03,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:03,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:03,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:03,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-25 02:07:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:03,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:03,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:03,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:03,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:03,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 02:07:03,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:03,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:03,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:03,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:03,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:03,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356037012] [2020-09-25 02:07:03,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:07:03,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:07:03,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548528078] [2020-09-25 02:07:03,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:07:03,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:03,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:07:03,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:07:03,274 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 4 states. [2020-09-25 02:07:03,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:03,429 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-09-25 02:07:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 02:07:03,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-09-25 02:07:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:03,432 INFO L225 Difference]: With dead ends: 92 [2020-09-25 02:07:03,432 INFO L226 Difference]: Without dead ends: 62 [2020-09-25 02:07:03,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:07:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-25 02:07:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-09-25 02:07:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-25 02:07:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-25 02:07:03,444 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2020-09-25 02:07:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:03,445 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-25 02:07:03,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:07:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-25 02:07:03,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 02:07:03,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:03,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:03,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:07:03,448 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:03,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1785369867, now seen corresponding path program 1 times [2020-09-25 02:07:03,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:03,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957014875] [2020-09-25 02:07:03,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:03,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:03,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:03,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 02:07:03,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:03,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-09-25 02:07:03,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:03,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:07:03,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:03,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 02:07:03,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:03,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:03,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:03,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:03,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:03,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:03,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:07:03,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:03,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:03,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:03,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:03,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:03,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 02:07:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:03,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:03,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:03,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:03,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:03,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 02:07:03,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:03,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:03,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:03,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:03,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:03,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957014875] [2020-09-25 02:07:03,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:03,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 02:07:03,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592544426] [2020-09-25 02:07:03,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:07:03,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:03,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:07:03,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:07:03,800 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 6 states. [2020-09-25 02:07:03,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:03,994 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-09-25 02:07:03,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 02:07:03,995 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-09-25 02:07:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:03,996 INFO L225 Difference]: With dead ends: 102 [2020-09-25 02:07:03,996 INFO L226 Difference]: Without dead ends: 72 [2020-09-25 02:07:03,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:07:04,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-25 02:07:04,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-09-25 02:07:04,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 02:07:04,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-09-25 02:07:04,013 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 49 [2020-09-25 02:07:04,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:04,017 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-09-25 02:07:04,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:07:04,017 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-09-25 02:07:04,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 02:07:04,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:04,021 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:04,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:07:04,024 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:04,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:04,024 INFO L82 PathProgramCache]: Analyzing trace with hash 862927473, now seen corresponding path program 2 times [2020-09-25 02:07:04,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:04,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539160155] [2020-09-25 02:07:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:04,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:04,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:04,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 02:07:04,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:04,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-09-25 02:07:04,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:04,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:07:04,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:04,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 02:07:04,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:04,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:04,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:04,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:04,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:04,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:04,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:07:04,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:04,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:04,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:04,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:04,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:04,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-25 02:07:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:04,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:04,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:04,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:04,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:04,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 02:07:04,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:04,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:04,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:04,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:04,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:04,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539160155] [2020-09-25 02:07:04,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:04,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 02:07:04,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212865899] [2020-09-25 02:07:04,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 02:07:04,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:04,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 02:07:04,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:07:04,375 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-09-25 02:07:04,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:04,561 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-09-25 02:07:04,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 02:07:04,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-09-25 02:07:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:04,563 INFO L225 Difference]: With dead ends: 112 [2020-09-25 02:07:04,563 INFO L226 Difference]: Without dead ends: 82 [2020-09-25 02:07:04,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:07:04,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-25 02:07:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-09-25 02:07:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 02:07:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-09-25 02:07:04,574 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 59 [2020-09-25 02:07:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:04,575 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-09-25 02:07:04,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 02:07:04,575 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-09-25 02:07:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 02:07:04,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:04,577 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:04,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:07:04,578 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:04,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:04,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1103681623, now seen corresponding path program 3 times [2020-09-25 02:07:04,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:04,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461858522] [2020-09-25 02:07:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:04,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:04,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:04,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 02:07:04,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:04,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-09-25 02:07:04,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:07:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 02:07:04,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:05,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:05,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:05,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:05,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:05,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:05,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:07:05,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:05,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:05,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:05,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:05,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:05,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-25 02:07:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:05,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:05,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:05,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:05,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:05,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 02:07:05,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:05,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:05,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:05,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461858522] [2020-09-25 02:07:05,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:05,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 02:07:05,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315642601] [2020-09-25 02:07:05,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 02:07:05,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:05,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 02:07:05,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:07:05,139 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-09-25 02:07:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:05,327 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-09-25 02:07:05,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 02:07:05,332 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-25 02:07:05,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:05,334 INFO L225 Difference]: With dead ends: 122 [2020-09-25 02:07:05,334 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 02:07:05,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-25 02:07:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 02:07:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-09-25 02:07:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-25 02:07:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-09-25 02:07:05,343 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 69 [2020-09-25 02:07:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:05,343 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-09-25 02:07:05,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 02:07:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-09-25 02:07:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 02:07:05,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:05,345 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:05,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:07:05,346 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:05,346 INFO L82 PathProgramCache]: Analyzing trace with hash -67449155, now seen corresponding path program 4 times [2020-09-25 02:07:05,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:05,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422750747] [2020-09-25 02:07:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:05,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:05,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:05,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-25 02:07:05,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:05,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 533 [2020-09-25 02:07:05,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:05,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:07:05,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:05,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 02:07:05,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:06,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:06,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:06,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:06,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:06,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:06,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:07:06,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:06,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:06,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:06,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:06,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:06,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-25 02:07:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:06,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:06,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:06,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:06,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:06,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 02:07:06,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:06,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:06,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422750747] [2020-09-25 02:07:06,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:06,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 02:07:06,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192974928] [2020-09-25 02:07:06,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 02:07:06,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:06,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 02:07:06,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:07:06,120 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-09-25 02:07:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:06,417 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-09-25 02:07:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 02:07:06,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-09-25 02:07:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:06,425 INFO L225 Difference]: With dead ends: 132 [2020-09-25 02:07:06,425 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 02:07:06,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-25 02:07:06,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 02:07:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-09-25 02:07:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-25 02:07:06,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-09-25 02:07:06,449 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 79 [2020-09-25 02:07:06,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:06,450 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-09-25 02:07:06,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 02:07:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-09-25 02:07:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-25 02:07:06,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:06,451 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:06,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:07:06,452 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:06,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:06,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2083488349, now seen corresponding path program 5 times [2020-09-25 02:07:06,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:06,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792806095] [2020-09-25 02:07:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:06,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:07,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:07,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-25 02:07:07,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:07,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-09-25 02:07:07,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:07,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 02:07:07,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:07,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-25 02:07:07,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:07,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:07,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:07,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:07,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:07,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:07,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:07:07,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:07,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:07,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:07,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:07,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:07,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-25 02:07:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:07,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:07,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:07,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:07,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:07,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:07:07,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:07,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:07,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:07,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:07,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:07,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792806095] [2020-09-25 02:07:07,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:07,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 02:07:07,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858299723] [2020-09-25 02:07:07,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 02:07:07,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:07,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 02:07:07,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-25 02:07:07,470 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 14 states. [2020-09-25 02:07:07,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:07,812 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-09-25 02:07:07,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 02:07:07,814 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-09-25 02:07:07,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:07,816 INFO L225 Difference]: With dead ends: 142 [2020-09-25 02:07:07,816 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 02:07:07,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-25 02:07:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 02:07:07,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-09-25 02:07:07,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-25 02:07:07,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-09-25 02:07:07,834 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 89 [2020-09-25 02:07:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:07,837 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-09-25 02:07:07,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 02:07:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-09-25 02:07:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-25 02:07:07,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:07,839 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:07,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:07:07,843 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:07,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:07,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1012745481, now seen corresponding path program 6 times [2020-09-25 02:07:07,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:07,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53916883] [2020-09-25 02:07:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:07,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:08,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:08,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-25 02:07:08,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:08,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-09-25 02:07:08,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:08,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 02:07:08,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:08,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-25 02:07:08,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:08,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:08,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:08,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:08,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:08,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:08,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:07:08,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:08,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:08,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:08,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:08,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:08,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-25 02:07:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:08,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:08,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:08,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:08,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:08,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 02:07:08,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:08,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:08,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:09,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53916883] [2020-09-25 02:07:09,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:09,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 02:07:09,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714787367] [2020-09-25 02:07:09,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 02:07:09,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:09,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 02:07:09,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-25 02:07:09,007 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-09-25 02:07:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:09,493 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-09-25 02:07:09,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 02:07:09,493 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-09-25 02:07:09,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:09,495 INFO L225 Difference]: With dead ends: 152 [2020-09-25 02:07:09,495 INFO L226 Difference]: Without dead ends: 122 [2020-09-25 02:07:09,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-25 02:07:09,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-25 02:07:09,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2020-09-25 02:07:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-25 02:07:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-09-25 02:07:09,514 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 99 [2020-09-25 02:07:09,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:09,514 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-09-25 02:07:09,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 02:07:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-09-25 02:07:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-25 02:07:09,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:09,516 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:09,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 02:07:09,517 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:09,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:09,521 INFO L82 PathProgramCache]: Analyzing trace with hash -805534481, now seen corresponding path program 7 times [2020-09-25 02:07:09,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:09,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781047437] [2020-09-25 02:07:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:09,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:10,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:10,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-25 02:07:10,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:10,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-25 02:07:10,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:10,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 02:07:10,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:10,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-25 02:07:10,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:10,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:10,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:10,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:10,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:10,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:10,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:07:10,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:10,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:10,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-25 02:07:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:10,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:10,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:10,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:10,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:10,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 02:07:10,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:10,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:10,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:10,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:10,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:10,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781047437] [2020-09-25 02:07:10,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:10,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 02:07:10,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921381081] [2020-09-25 02:07:10,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 02:07:10,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:10,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 02:07:10,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-25 02:07:10,813 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 18 states. [2020-09-25 02:07:11,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:11,245 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-09-25 02:07:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 02:07:11,246 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-09-25 02:07:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:11,247 INFO L225 Difference]: With dead ends: 162 [2020-09-25 02:07:11,248 INFO L226 Difference]: Without dead ends: 132 [2020-09-25 02:07:11,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-25 02:07:11,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-25 02:07:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-25 02:07:11,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-25 02:07:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-09-25 02:07:11,257 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 109 [2020-09-25 02:07:11,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:11,257 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-09-25 02:07:11,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 02:07:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-09-25 02:07:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-25 02:07:11,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:11,259 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:11,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 02:07:11,260 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:11,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1236165291, now seen corresponding path program 8 times [2020-09-25 02:07:11,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:11,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610115728] [2020-09-25 02:07:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:11,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:12,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:12,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-09-25 02:07:12,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:12,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1205 [2020-09-25 02:07:12,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 02:07:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:12,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-25 02:07:12,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:12,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:12,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:12,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:12,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:12,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:12,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:07:12,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:12,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:12,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:12,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:12,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:12,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-25 02:07:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:12,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:12,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:12,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:12,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:12,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:07:12,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:12,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:12,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:12,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:12,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:12,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610115728] [2020-09-25 02:07:12,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:12,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 02:07:12,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723167120] [2020-09-25 02:07:12,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 02:07:12,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:12,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 02:07:12,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-25 02:07:12,782 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 20 states. [2020-09-25 02:07:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:13,286 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-09-25 02:07:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 02:07:13,287 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-09-25 02:07:13,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:13,288 INFO L225 Difference]: With dead ends: 172 [2020-09-25 02:07:13,289 INFO L226 Difference]: Without dead ends: 142 [2020-09-25 02:07:13,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 02:07:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-25 02:07:13,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-09-25 02:07:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-25 02:07:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-09-25 02:07:13,299 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 119 [2020-09-25 02:07:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:13,300 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-09-25 02:07:13,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 02:07:13,300 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-09-25 02:07:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-25 02:07:13,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:13,303 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:13,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 02:07:13,304 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:13,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:13,304 INFO L82 PathProgramCache]: Analyzing trace with hash 977792571, now seen corresponding path program 9 times [2020-09-25 02:07:13,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:13,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730358239] [2020-09-25 02:07:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:13,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:14,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:14,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-09-25 02:07:14,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:14,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1398 [2020-09-25 02:07:14,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:14,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 02:07:14,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:14,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-25 02:07:14,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:15,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:15,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:15,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:15,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:15,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:15,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:07:15,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:15,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:15,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:15,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:15,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:15,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-25 02:07:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:15,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:15,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:15,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:15,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:15,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:07:15,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:15,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:15,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:15,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:15,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:15,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730358239] [2020-09-25 02:07:15,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:15,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 02:07:15,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426896774] [2020-09-25 02:07:15,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 02:07:15,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:15,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 02:07:15,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-25 02:07:15,063 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-09-25 02:07:15,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:15,624 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-09-25 02:07:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-25 02:07:15,625 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-09-25 02:07:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:15,626 INFO L225 Difference]: With dead ends: 182 [2020-09-25 02:07:15,626 INFO L226 Difference]: Without dead ends: 152 [2020-09-25 02:07:15,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 02:07:15,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-25 02:07:15,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2020-09-25 02:07:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-25 02:07:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-09-25 02:07:15,633 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2020-09-25 02:07:15,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:15,634 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-09-25 02:07:15,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 02:07:15,634 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-09-25 02:07:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-25 02:07:15,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:15,636 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:15,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 02:07:15,636 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:15,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1234849, now seen corresponding path program 10 times [2020-09-25 02:07:15,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:15,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603203886] [2020-09-25 02:07:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:15,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:17,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:17,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-25 02:07:17,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:17,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1629 [2020-09-25 02:07:17,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 02:07:17,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:17,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-25 02:07:17,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:17,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:17,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:17,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:17,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:17,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:17,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 02:07:17,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:17,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:17,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:17,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:17,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:17,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-25 02:07:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:17,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:17,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:17,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:17,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:17,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:07:17,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:17,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:17,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:17,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:17,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:17,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603203886] [2020-09-25 02:07:17,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:17,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 02:07:17,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679392658] [2020-09-25 02:07:17,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 02:07:17,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:17,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 02:07:17,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-25 02:07:17,640 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 24 states. [2020-09-25 02:07:18,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:18,258 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-09-25 02:07:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-25 02:07:18,258 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-09-25 02:07:18,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:18,260 INFO L225 Difference]: With dead ends: 192 [2020-09-25 02:07:18,260 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 02:07:18,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 02:07:18,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 02:07:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-09-25 02:07:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-25 02:07:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-09-25 02:07:18,270 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 139 [2020-09-25 02:07:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:18,270 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-09-25 02:07:18,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 02:07:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-09-25 02:07:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-25 02:07:18,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:18,272 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:18,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 02:07:18,272 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:18,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash 187545991, now seen corresponding path program 11 times [2020-09-25 02:07:18,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:18,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079479863] [2020-09-25 02:07:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:18,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:20,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:20,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-25 02:07:20,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:20,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1948 [2020-09-25 02:07:20,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:20,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 02:07:20,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:20,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-25 02:07:20,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:20,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:20,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:20,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:20,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:20,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:20,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:07:20,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:20,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:20,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:20,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:20,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:20,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-25 02:07:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:20,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:20,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:20,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:20,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:20,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:07:20,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:20,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:20,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:20,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:20,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:20,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079479863] [2020-09-25 02:07:20,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:20,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 02:07:20,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864746239] [2020-09-25 02:07:20,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 02:07:20,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:20,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 02:07:20,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-25 02:07:20,677 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 26 states. [2020-09-25 02:07:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:21,404 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-09-25 02:07:21,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-25 02:07:21,408 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-09-25 02:07:21,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:21,410 INFO L225 Difference]: With dead ends: 202 [2020-09-25 02:07:21,410 INFO L226 Difference]: Without dead ends: 172 [2020-09-25 02:07:21,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-25 02:07:21,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-25 02:07:21,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-09-25 02:07:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-25 02:07:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-09-25 02:07:21,424 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 149 [2020-09-25 02:07:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:21,424 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-09-25 02:07:21,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 02:07:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-09-25 02:07:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-25 02:07:21,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:21,426 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:21,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 02:07:21,427 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:21,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:21,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1146876909, now seen corresponding path program 12 times [2020-09-25 02:07:21,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:21,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231618374] [2020-09-25 02:07:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:21,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:23,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:23,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-25 02:07:23,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:23,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2208 [2020-09-25 02:07:23,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:23,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 02:07:23,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:23,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-25 02:07:23,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:24,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:24,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:24,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:24,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:24,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:24,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:07:24,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:24,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:24,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:24,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:24,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:24,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-25 02:07:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:24,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:24,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:24,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:24,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:24,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:07:24,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:24,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:24,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:24,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:24,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:07:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:24,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231618374] [2020-09-25 02:07:24,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:24,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-25 02:07:24,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721265257] [2020-09-25 02:07:24,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-25 02:07:24,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:24,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-25 02:07:24,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-25 02:07:24,275 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 28 states. [2020-09-25 02:07:25,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:25,099 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-09-25 02:07:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-25 02:07:25,100 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-09-25 02:07:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:25,102 INFO L225 Difference]: With dead ends: 212 [2020-09-25 02:07:25,102 INFO L226 Difference]: Without dead ends: 182 [2020-09-25 02:07:25,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 02:07:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-25 02:07:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-09-25 02:07:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-25 02:07:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-09-25 02:07:25,110 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2020-09-25 02:07:25,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:25,111 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-09-25 02:07:25,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-25 02:07:25,111 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-09-25 02:07:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-25 02:07:25,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:25,113 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:25,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 02:07:25,113 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:25,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2141775571, now seen corresponding path program 13 times [2020-09-25 02:07:25,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:25,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949687507] [2020-09-25 02:07:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:25,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:27,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:27,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-09-25 02:07:27,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:27,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2462 [2020-09-25 02:07:27,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:27,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-25 02:07:27,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:27,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-09-25 02:07:27,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:28,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:28,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:28,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:28,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:28,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:28,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:07:28,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:28,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:28,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:28,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:28,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:28,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-25 02:07:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:28,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:28,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:28,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:28,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:28,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 02:07:28,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:28,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:28,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:28,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:28,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949687507] [2020-09-25 02:07:28,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:28,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-25 02:07:28,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269085818] [2020-09-25 02:07:28,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-25 02:07:28,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:28,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-25 02:07:28,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-25 02:07:28,165 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 30 states. [2020-09-25 02:07:29,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:29,225 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-09-25 02:07:29,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-25 02:07:29,226 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 169 [2020-09-25 02:07:29,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:29,228 INFO L225 Difference]: With dead ends: 222 [2020-09-25 02:07:29,228 INFO L226 Difference]: Without dead ends: 192 [2020-09-25 02:07:29,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-25 02:07:29,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-25 02:07:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-09-25 02:07:29,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-25 02:07:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2020-09-25 02:07:29,240 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 169 [2020-09-25 02:07:29,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:29,240 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2020-09-25 02:07:29,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-25 02:07:29,241 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2020-09-25 02:07:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-25 02:07:29,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:29,243 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:29,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 02:07:29,243 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:29,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:29,244 INFO L82 PathProgramCache]: Analyzing trace with hash 40366649, now seen corresponding path program 14 times [2020-09-25 02:07:29,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:29,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120122829] [2020-09-25 02:07:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:29,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:31,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:31,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-25 02:07:31,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:31,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2654 [2020-09-25 02:07:31,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:31,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-25 02:07:31,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:31,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-25 02:07:31,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:32,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:32,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:32,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:32,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:32,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:32,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:07:32,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:32,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:32,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:32,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:32,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:32,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-25 02:07:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:32,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:32,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:32,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:32,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:32,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:07:32,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:32,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:32,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:32,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:32,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:32,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120122829] [2020-09-25 02:07:32,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:32,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-25 02:07:32,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782252873] [2020-09-25 02:07:32,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-25 02:07:32,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:32,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-25 02:07:32,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-25 02:07:32,564 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 32 states. [2020-09-25 02:07:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:33,631 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-09-25 02:07:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-25 02:07:33,632 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-09-25 02:07:33,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:33,634 INFO L225 Difference]: With dead ends: 232 [2020-09-25 02:07:33,635 INFO L226 Difference]: Without dead ends: 202 [2020-09-25 02:07:33,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-25 02:07:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-25 02:07:33,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-09-25 02:07:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-25 02:07:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-09-25 02:07:33,643 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 179 [2020-09-25 02:07:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:33,644 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-09-25 02:07:33,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-25 02:07:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-09-25 02:07:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-25 02:07:33,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:33,646 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:33,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 02:07:33,647 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:33,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:33,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1993050593, now seen corresponding path program 15 times [2020-09-25 02:07:33,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:33,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325255950] [2020-09-25 02:07:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:33,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:36,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:36,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-09-25 02:07:36,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:36,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2605 [2020-09-25 02:07:36,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:36,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-25 02:07:36,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:36,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-09-25 02:07:36,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:36,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:36,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:36,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:36,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:36,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:36,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:07:36,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:36,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:36,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:36,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:36,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:36,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-25 02:07:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:36,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:36,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:36,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:36,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:36,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 02:07:36,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:36,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:36,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325255950] [2020-09-25 02:07:36,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:36,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-25 02:07:36,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861968408] [2020-09-25 02:07:36,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-25 02:07:36,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:36,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-25 02:07:36,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 02:07:36,988 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 34 states. [2020-09-25 02:07:38,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:38,159 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-09-25 02:07:38,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-25 02:07:38,160 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-09-25 02:07:38,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:38,163 INFO L225 Difference]: With dead ends: 242 [2020-09-25 02:07:38,163 INFO L226 Difference]: Without dead ends: 212 [2020-09-25 02:07:38,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-25 02:07:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-25 02:07:38,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-09-25 02:07:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-25 02:07:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-09-25 02:07:38,170 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 189 [2020-09-25 02:07:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:38,171 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-09-25 02:07:38,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-25 02:07:38,171 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-09-25 02:07:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-25 02:07:38,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:38,172 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:38,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 02:07:38,173 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:38,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:38,173 INFO L82 PathProgramCache]: Analyzing trace with hash -839789947, now seen corresponding path program 16 times [2020-09-25 02:07:38,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:38,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807736493] [2020-09-25 02:07:38,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:38,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:40,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:40,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-09-25 02:07:40,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:40,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2754 [2020-09-25 02:07:40,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:40,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-25 02:07:40,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:40,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-09-25 02:07:40,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:41,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:41,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:41,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:41,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:41,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:41,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:07:41,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:41,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:41,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:41,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:41,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:41,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-25 02:07:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:41,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:41,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:41,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:41,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:41,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:07:41,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:41,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:41,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:41,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:41,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:41,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:41,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807736493] [2020-09-25 02:07:41,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:41,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-25 02:07:41,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10265634] [2020-09-25 02:07:41,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-25 02:07:41,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:41,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-25 02:07:41,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 02:07:41,681 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 36 states. [2020-09-25 02:07:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:43,039 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-09-25 02:07:43,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-25 02:07:43,040 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 199 [2020-09-25 02:07:43,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:43,042 INFO L225 Difference]: With dead ends: 252 [2020-09-25 02:07:43,043 INFO L226 Difference]: Without dead ends: 222 [2020-09-25 02:07:43,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-25 02:07:43,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-25 02:07:43,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2020-09-25 02:07:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-25 02:07:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-09-25 02:07:43,053 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 199 [2020-09-25 02:07:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:43,054 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-09-25 02:07:43,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-25 02:07:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-09-25 02:07:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-25 02:07:43,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:43,056 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:43,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-25 02:07:43,056 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:43,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1916049557, now seen corresponding path program 17 times [2020-09-25 02:07:43,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:43,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140607581] [2020-09-25 02:07:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:43,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:46,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:46,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-09-25 02:07:46,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:46,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3091 [2020-09-25 02:07:46,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:46,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-25 02:07:46,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:07:46,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-09-25 02:07:46,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:46,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:07:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:46,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:47,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:47,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:07:47,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:47,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:07:47,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:47,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:47,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:07:47,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:47,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:47,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-25 02:07:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:47,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:07:47,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:07:47,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:07:47,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:07:47,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:07:47,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:07:47,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:07:47,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:07:47,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:07:47,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:07:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:07:47,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140607581] [2020-09-25 02:07:47,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:07:47,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-25 02:07:47,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319340665] [2020-09-25 02:07:47,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-25 02:07:47,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:07:47,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-25 02:07:47,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-25 02:07:47,058 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 38 states. [2020-09-25 02:07:48,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:07:48,579 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-09-25 02:07:48,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-25 02:07:48,579 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-09-25 02:07:48,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:07:48,582 INFO L225 Difference]: With dead ends: 262 [2020-09-25 02:07:48,582 INFO L226 Difference]: Without dead ends: 232 [2020-09-25 02:07:48,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-25 02:07:48,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-25 02:07:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-09-25 02:07:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-09-25 02:07:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2020-09-25 02:07:48,591 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 209 [2020-09-25 02:07:48,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:07:48,591 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2020-09-25 02:07:48,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-25 02:07:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2020-09-25 02:07:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-09-25 02:07:48,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:07:48,593 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:07:48,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-25 02:07:48,593 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:07:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:07:48,594 INFO L82 PathProgramCache]: Analyzing trace with hash 255104209, now seen corresponding path program 18 times [2020-09-25 02:07:48,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:07:48,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058379094] [2020-09-25 02:07:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:07:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:07:48,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking...