/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_strcmp_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:30:10,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:30:10,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:30:10,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:30:10,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:30:10,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:30:10,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:30:10,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:30:10,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:30:10,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:30:10,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:30:10,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:30:10,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:30:10,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:30:10,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:30:10,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:30:10,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:30:10,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:30:10,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:30:10,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:30:10,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:30:10,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:30:10,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:30:10,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:30:10,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:30:10,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:30:10,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:30:10,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:30:10,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:30:10,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:30:10,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:30:10,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:30:10,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:30:10,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:30:10,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:30:10,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:30:10,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:30:10,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:30:10,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:30:10,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:30:10,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:30:10,463 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:30:10,490 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:30:10,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:30:10,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:30:10,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:30:10,492 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:30:10,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:30:10,493 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:30:10,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:30:10,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:30:10,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:30:10,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:30:10,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:30:10,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:30:10,498 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:30:10,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:30:10,498 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:30:10,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:30:10,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:30:10,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:30:10,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:30:10,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:30:10,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:30:10,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:30:10,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:30:10,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:30:10,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:30:10,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:30:10,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:30:10,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:30:10,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:30:10,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:30:10,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:30:10,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:30:10,963 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:30:10,963 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:30:10,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2020-10-26 19:30:11,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4357f3340/883cd803649d4de1a34f814cc838942a/FLAG4be7fed55 [2020-10-26 19:30:11,670 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:30:11,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_strcmp_ground.i [2020-10-26 19:30:11,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4357f3340/883cd803649d4de1a34f814cc838942a/FLAG4be7fed55 [2020-10-26 19:30:12,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4357f3340/883cd803649d4de1a34f814cc838942a [2020-10-26 19:30:12,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:30:12,051 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:30:12,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:30:12,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:30:12,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:30:12,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:30:12" (1/1) ... [2020-10-26 19:30:12,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca0bb4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:30:12, skipping insertion in model container [2020-10-26 19:30:12,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:30:12" (1/1) ... [2020-10-26 19:30:12,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:30:12,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:30:12,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:30:12,255 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:30:12,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:30:12,299 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:30:12,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:30:12 WrapperNode [2020-10-26 19:30:12,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:30:12,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:30:12,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:30:12,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:30:12,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:30:12" (1/1) ... [2020-10-26 19:30:12,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:30:12" (1/1) ... [2020-10-26 19:30:12,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:30:12" (1/1) ... [2020-10-26 19:30:12,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:30:12" (1/1) ... [2020-10-26 19:30:12,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:30:12" (1/1) ... [2020-10-26 19:30:12,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:30:12" (1/1) ... [2020-10-26 19:30:12,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:30:12" (1/1) ... [2020-10-26 19:30:12,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:30:12,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:30:12,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:30:12,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:30:12,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:30:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:30:12,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:30:12,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:30:12,418 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:30:12,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:30:12,419 INFO L138 BoogieDeclarations]: Found implementation of procedure _strcmp [2020-10-26 19:30:12,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:30:12,420 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:30:12,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:30:12,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:30:12,421 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:30:12,421 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:30:12,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:30:12,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:30:12,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:30:12,422 INFO L130 BoogieDeclarations]: Found specification of procedure _strcmp [2020-10-26 19:30:12,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:30:12,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:30:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:30:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:30:12,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:30:12,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:30:12,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:30:12,912 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:30:12,916 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:30:12,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:30:12 BoogieIcfgContainer [2020-10-26 19:30:12,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:30:12,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:30:12,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:30:12,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:30:12,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:30:12" (1/3) ... [2020-10-26 19:30:12,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ce68e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:30:12, skipping insertion in model container [2020-10-26 19:30:12,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:30:12" (2/3) ... [2020-10-26 19:30:12,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ce68e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:30:12, skipping insertion in model container [2020-10-26 19:30:12,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:30:12" (3/3) ... [2020-10-26 19:30:12,933 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcmp_ground.i [2020-10-26 19:30:12,947 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:30:12,953 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:30:12,969 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:30:13,009 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:30:13,010 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:30:13,010 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:30:13,011 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:30:13,011 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:30:13,011 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:30:13,011 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:30:13,012 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:30:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-26 19:30:13,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:30:13,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:13,044 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] [2020-10-26 19:30:13,044 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:13,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:13,054 INFO L82 PathProgramCache]: Analyzing trace with hash 431389671, now seen corresponding path program 1 times [2020-10-26 19:30:13,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:13,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793322330] [2020-10-26 19:30:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:13,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:13,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:13,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:13,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:30:13,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:13,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-26 19:30:13,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:13,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:13,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:30:13,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:13,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:30:13,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:13,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:13,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:13,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:13,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:13,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:30:13,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:13,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:13,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:13,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:30:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:13,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:13,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:13,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:13,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:13,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:13,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 19:30:13,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:13,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:30:13,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:30:13,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:30:13,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:30:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:13,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793322330] [2020-10-26 19:30:13,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:30:13,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:30:13,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118404580] [2020-10-26 19:30:13,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:30:13,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:13,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:30:13,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:30:13,794 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-10-26 19:30:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:13,964 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2020-10-26 19:30:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:30:13,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-26 19:30:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:13,988 INFO L225 Difference]: With dead ends: 67 [2020-10-26 19:30:13,989 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 19:30:13,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:30:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 19:30:14,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-26 19:30:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:30:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-26 19:30:14,038 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-10-26 19:30:14,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:14,038 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-26 19:30:14,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:30:14,039 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-26 19:30:14,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:30:14,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:14,040 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] [2020-10-26 19:30:14,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:30:14,041 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:14,042 INFO L82 PathProgramCache]: Analyzing trace with hash -2032592172, now seen corresponding path program 1 times [2020-10-26 19:30:14,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:14,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870152474] [2020-10-26 19:30:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:14,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:14,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:30:14,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:14,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-26 19:30:14,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:14,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:30:14,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:14,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:30:14,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:30:14,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:14,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:14,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:14,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:14,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:30:14,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:14,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:14,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:14,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:14,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:14,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:30:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:14,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:14,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:14,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:14,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:30:14,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:14,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:14,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:14,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:14,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:30:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:14,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870152474] [2020-10-26 19:30:14,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:30:14,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:30:14,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949730033] [2020-10-26 19:30:14,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:30:14,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:14,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:30:14,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:30:14,467 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2020-10-26 19:30:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:14,562 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-26 19:30:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:30:14,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-26 19:30:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:14,564 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:30:14,564 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:30:14,565 INFO L677 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 [2020-10-26 19:30:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:30:14,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-26 19:30:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 19:30:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-26 19:30:14,574 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2020-10-26 19:30:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:14,574 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-26 19:30:14,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:30:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-26 19:30:14,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:30:14,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:14,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:14,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:30:14,576 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:14,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:14,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1128743094, now seen corresponding path program 1 times [2020-10-26 19:30:14,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:14,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832627250] [2020-10-26 19:30:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:14,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:14,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:30:14,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:14,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-26 19:30:14,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:14,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:30:14,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:14,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:30:14,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:30:15,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:15,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:15,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:15,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:15,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:15,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:30:15,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:15,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:15,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:15,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:15,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:15,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-26 19:30:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:15,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:15,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:15,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:15,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:15,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:30:15,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:15,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:15,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:15,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:15,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:15,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832627250] [2020-10-26 19:30:15,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:15,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:30:15,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67131322] [2020-10-26 19:30:15,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:30:15,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:15,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:30:15,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:30:15,080 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2020-10-26 19:30:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:15,183 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-10-26 19:30:15,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:30:15,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-26 19:30:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:15,185 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:30:15,185 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:30:15,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:30:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:30:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-26 19:30:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:30:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-26 19:30:15,193 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2020-10-26 19:30:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:15,193 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-26 19:30:15,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:30:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-26 19:30:15,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:30:15,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:15,195 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:15,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:30:15,195 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:15,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:15,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1664911848, now seen corresponding path program 2 times [2020-10-26 19:30:15,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:15,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931488394] [2020-10-26 19:30:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:15,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:15,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:15,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:15,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:30:15,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:15,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-26 19:30:15,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:15,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:30:15,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:15,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:30:15,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:15,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:15,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:15,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:15,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:15,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:15,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:30:15,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:15,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:15,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:15,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:15,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:15,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-26 19:30:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:15,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:15,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:15,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:15,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:15,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:15,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:15,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:15,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:15,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:15,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:15,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931488394] [2020-10-26 19:30:15,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:15,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:30:15,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000388387] [2020-10-26 19:30:15,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:30:15,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:15,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:30:15,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:30:15,607 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 6 states. [2020-10-26 19:30:15,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:15,703 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-26 19:30:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:30:15,703 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-26 19:30:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:15,704 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:30:15,704 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:30:15,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:30:15,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:30:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-26 19:30:15,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:30:15,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-26 19:30:15,712 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 26 [2020-10-26 19:30:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:15,713 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-26 19:30:15,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:30:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-26 19:30:15,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:30:15,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:15,714 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:15,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:30:15,715 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:15,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:15,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2012751110, now seen corresponding path program 3 times [2020-10-26 19:30:15,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:15,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190536471] [2020-10-26 19:30:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:15,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:15,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:16,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:16,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:30:16,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:16,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-26 19:30:16,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:16,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:30:16,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:16,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:30:16,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:16,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:16,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:16,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:16,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:16,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:16,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:30:16,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:16,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:16,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:16,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-26 19:30:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:16,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:16,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:16,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:16,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:16,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:30:16,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:16,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:16,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:16,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:16,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:16,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190536471] [2020-10-26 19:30:16,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:16,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:30:16,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276441938] [2020-10-26 19:30:16,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:30:16,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:16,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:30:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:30:16,298 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 7 states. [2020-10-26 19:30:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:16,405 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-26 19:30:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:30:16,405 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-26 19:30:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:16,407 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:30:16,407 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:30:16,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:30:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:30:16,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-26 19:30:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:30:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-26 19:30:16,415 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 28 [2020-10-26 19:30:16,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:16,415 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-26 19:30:16,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:30:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-26 19:30:16,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:30:16,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:16,417 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:16,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:30:16,417 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:16,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1278832804, now seen corresponding path program 4 times [2020-10-26 19:30:16,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:16,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215627156] [2020-10-26 19:30:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:16,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:16,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:17,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:17,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:30:17,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:17,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 655 [2020-10-26 19:30:17,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:17,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:30:17,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:17,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:30:17,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:17,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:17,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:17,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:17,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:17,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:17,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:17,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:17,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:17,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:17,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:17,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:17,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-26 19:30:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:17,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:17,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:17,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:17,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:17,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:17,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:17,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:17,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:17,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:17,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:17,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215627156] [2020-10-26 19:30:17,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:17,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:30:17,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472103178] [2020-10-26 19:30:17,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:30:17,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:17,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:30:17,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:30:17,170 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 8 states. [2020-10-26 19:30:17,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:17,285 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-26 19:30:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:30:17,285 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-26 19:30:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:17,286 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:30:17,286 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:30:17,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:30:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:30:17,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-26 19:30:17,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:30:17,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-26 19:30:17,293 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 30 [2020-10-26 19:30:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:17,293 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-26 19:30:17,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:30:17,294 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-26 19:30:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:30:17,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:17,295 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:17,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:30:17,295 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:17,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:17,296 INFO L82 PathProgramCache]: Analyzing trace with hash -357977282, now seen corresponding path program 5 times [2020-10-26 19:30:17,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:17,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040142497] [2020-10-26 19:30:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:17,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:17,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:18,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:18,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:30:18,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:18,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-10-26 19:30:18,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:18,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:30:18,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:18,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:30:18,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:18,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:18,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:18,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:18,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:18,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:18,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:30:18,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:18,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:18,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:18,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:18,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:30:18,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-26 19:30:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:18,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:18,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:18,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:18,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:18,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:30:18,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:18,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:18,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:30:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:18,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040142497] [2020-10-26 19:30:18,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:18,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:30:18,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38770388] [2020-10-26 19:30:18,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:30:18,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:18,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:30:18,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:30:18,430 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 9 states. [2020-10-26 19:30:18,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:18,563 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-26 19:30:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:30:18,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-26 19:30:18,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:18,564 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:30:18,564 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:30:18,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:30:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:30:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-26 19:30:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:30:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-26 19:30:18,575 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 32 [2020-10-26 19:30:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:18,575 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-26 19:30:18,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:30:18,575 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-26 19:30:18,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:30:18,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:18,576 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:18,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:30:18,577 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:18,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:18,579 INFO L82 PathProgramCache]: Analyzing trace with hash -179083616, now seen corresponding path program 6 times [2020-10-26 19:30:18,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:18,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940274181] [2020-10-26 19:30:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:18,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:18,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:19,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:30:19,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:19,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1346 [2020-10-26 19:30:19,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:19,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:30:19,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:19,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:30:19,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:20,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:20,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:20,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:20,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:20,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:20,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:20,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:20,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:20,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:20,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:20,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:20,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 19:30:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:20,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:20,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:20,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:20,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:20,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:20,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:20,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:20,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940274181] [2020-10-26 19:30:20,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:20,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:30:20,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716831436] [2020-10-26 19:30:20,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:30:20,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:20,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:30:20,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:30:20,046 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2020-10-26 19:30:20,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:20,186 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-26 19:30:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:30:20,187 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-26 19:30:20,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:20,188 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:30:20,188 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:30:20,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:30:20,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:30:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-26 19:30:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:30:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-26 19:30:20,194 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 34 [2020-10-26 19:30:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:20,195 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-26 19:30:20,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:30:20,195 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-26 19:30:20,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:30:20,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:20,196 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:20,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:30:20,196 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:20,197 INFO L82 PathProgramCache]: Analyzing trace with hash -60962430, now seen corresponding path program 7 times [2020-10-26 19:30:20,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:20,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426635452] [2020-10-26 19:30:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:20,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:20,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:21,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:21,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:30:21,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:21,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1534 [2020-10-26 19:30:21,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:21,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:30:21,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:21,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:30:21,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:21,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:21,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:21,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:21,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:21,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:21,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:30:21,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:21,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:21,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:21,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:21,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:30:21,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-26 19:30:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:21,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:21,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:21,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:21,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:21,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:30:21,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:21,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:21,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:21,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:21,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:21,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426635452] [2020-10-26 19:30:21,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:21,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:30:21,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888549143] [2020-10-26 19:30:21,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:30:21,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:21,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:30:21,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:30:21,868 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 11 states. [2020-10-26 19:30:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:21,991 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-26 19:30:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:30:21,992 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-26 19:30:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:21,993 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:30:21,993 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:30:21,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:30:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:30:21,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-26 19:30:21,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:30:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-26 19:30:22,000 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 36 [2020-10-26 19:30:22,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:22,001 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-26 19:30:22,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:30:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-26 19:30:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:30:22,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:22,002 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:22,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:30:22,002 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:22,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:22,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1784347620, now seen corresponding path program 8 times [2020-10-26 19:30:22,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:22,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515978478] [2020-10-26 19:30:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:22,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:22,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:24,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:30:24,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:24,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2048 [2020-10-26 19:30:24,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:24,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:30:24,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:24,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:30:24,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:24,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:24,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:24,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:24,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:24,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:24,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:24,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:24,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:24,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:24,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:24,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-26 19:30:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:24,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:24,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:24,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:24,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:30:24,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:24,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:24,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:24,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:24,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:24,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515978478] [2020-10-26 19:30:24,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:24,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:30:24,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211225991] [2020-10-26 19:30:24,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:30:24,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:24,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:30:24,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:30:24,208 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 12 states. [2020-10-26 19:30:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:24,359 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-26 19:30:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:30:24,359 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-26 19:30:24,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:24,360 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:30:24,360 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:30:24,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:30:24,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:30:24,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-26 19:30:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:30:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-26 19:30:24,371 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 38 [2020-10-26 19:30:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:24,371 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-26 19:30:24,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:30:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-26 19:30:24,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:30:24,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:24,375 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:24,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:30:24,376 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:24,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:24,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1305812422, now seen corresponding path program 9 times [2020-10-26 19:30:24,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:24,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874010136] [2020-10-26 19:30:24,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:24,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:26,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:26,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:30:26,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:26,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2335 [2020-10-26 19:30:26,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:26,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:30:26,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:26,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:30:26,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:26,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:26,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:26,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:26,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:26,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:26,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:30:26,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:26,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:26,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:26,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:26,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:26,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 19:30:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:26,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:26,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:26,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:26,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:26,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:26,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:26,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:26,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:26,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:26,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:26,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874010136] [2020-10-26 19:30:26,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:26,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:30:26,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419954209] [2020-10-26 19:30:26,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:30:26,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:26,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:30:26,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:30:26,904 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 13 states. [2020-10-26 19:30:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:27,089 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-26 19:30:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:30:27,090 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-10-26 19:30:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:27,090 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:30:27,091 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:30:27,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:30:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:30:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-26 19:30:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:30:27,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-26 19:30:27,097 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 40 [2020-10-26 19:30:27,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:27,097 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-26 19:30:27,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:30:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-26 19:30:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:30:27,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:27,098 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:27,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:30:27,099 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:27,099 INFO L82 PathProgramCache]: Analyzing trace with hash 994987816, now seen corresponding path program 10 times [2020-10-26 19:30:27,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:27,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651226164] [2020-10-26 19:30:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:27,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:27,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:29,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:29,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:30:29,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:29,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2724 [2020-10-26 19:30:29,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:29,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:30:29,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:29,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:30:29,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:30,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:30,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:30,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:30,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:30,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:30:30,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:30,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:30,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:30,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:30,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:30:30,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 19:30:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:30,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:30,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:30,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:30,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:30,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:30,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:30,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:30,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:30,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:30,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651226164] [2020-10-26 19:30:30,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:30,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:30:30,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920311673] [2020-10-26 19:30:30,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:30:30,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:30,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:30:30,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:30:30,042 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 14 states. [2020-10-26 19:30:30,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:30,221 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-10-26 19:30:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:30:30,222 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-26 19:30:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:30,223 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:30:30,223 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:30:30,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:30:30,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:30:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-26 19:30:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:30:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-26 19:30:30,233 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 42 [2020-10-26 19:30:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:30,233 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-26 19:30:30,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:30:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-26 19:30:30,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:30:30,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:30,236 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:30,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:30:30,237 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1354715126, now seen corresponding path program 11 times [2020-10-26 19:30:30,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:30,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381491939] [2020-10-26 19:30:30,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:30,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:33,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:33,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:30:33,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:33,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3237 [2020-10-26 19:30:33,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:33,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:30:33,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:33,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:30:33,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:33,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:33,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:33,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:33,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:33,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:33,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:30:33,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:33,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:33,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:33,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:33,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:33,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 19:30:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:33,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:33,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:33,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:33,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:33,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:30:33,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:33,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:33,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:33,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:33,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:33,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381491939] [2020-10-26 19:30:33,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:33,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:30:33,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847343958] [2020-10-26 19:30:33,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:30:33,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:33,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:30:33,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:30:33,721 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 15 states. [2020-10-26 19:30:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:33,860 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-26 19:30:33,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:30:33,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-26 19:30:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:33,862 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:30:33,862 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:30:33,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:30:33,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:30:33,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-26 19:30:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:30:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-26 19:30:33,874 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 44 [2020-10-26 19:30:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:33,875 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-26 19:30:33,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:30:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-26 19:30:33,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:30:33,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:33,879 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:33,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:30:33,879 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:33,880 INFO L82 PathProgramCache]: Analyzing trace with hash -266444692, now seen corresponding path program 12 times [2020-10-26 19:30:33,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:33,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883120967] [2020-10-26 19:30:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:33,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:33,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:37,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:30:37,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:37,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3590 [2020-10-26 19:30:37,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:37,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:30:37,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:37,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:30:37,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:37,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:37,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:37,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:37,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:37,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:37,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:37,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:37,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:37,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:37,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:30:37,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 19:30:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:37,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:37,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:37,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:37,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:37,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:37,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:37,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:37,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:37,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:37,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883120967] [2020-10-26 19:30:37,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:37,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:30:37,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598471953] [2020-10-26 19:30:37,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:30:37,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:37,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:30:37,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:30:37,718 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 16 states. [2020-10-26 19:30:38,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:38,004 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-10-26 19:30:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:30:38,005 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-26 19:30:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:38,005 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:30:38,005 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:30:38,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:30:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:30:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:30:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:30:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-26 19:30:38,017 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 46 [2020-10-26 19:30:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:38,017 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-26 19:30:38,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:30:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-26 19:30:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:30:38,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:38,023 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:38,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:30:38,023 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:38,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1884389454, now seen corresponding path program 13 times [2020-10-26 19:30:38,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:38,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706454693] [2020-10-26 19:30:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:38,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:38,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:41,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:41,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:30:41,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:41,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3891 [2020-10-26 19:30:41,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:41,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:30:41,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:41,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:30:41,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:42,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:42,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:42,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:42,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:42,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:42,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:42,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:42,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:42,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:42,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:42,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-26 19:30:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:42,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:42,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:42,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:42,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:42,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:42,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:42,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:42,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706454693] [2020-10-26 19:30:42,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:42,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:30:42,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100685231] [2020-10-26 19:30:42,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:30:42,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:42,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:30:42,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:30:42,179 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 17 states. [2020-10-26 19:30:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:42,426 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-26 19:30:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:30:42,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-26 19:30:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:42,428 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:30:42,428 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:30:42,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:30:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:30:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:30:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:30:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-26 19:30:42,435 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 48 [2020-10-26 19:30:42,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:42,435 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-26 19:30:42,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:30:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-26 19:30:42,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:30:42,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:42,436 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:42,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:30:42,436 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1338232912, now seen corresponding path program 14 times [2020-10-26 19:30:42,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:42,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496669599] [2020-10-26 19:30:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:42,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:46,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:46,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:30:46,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:46,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4113 [2020-10-26 19:30:46,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:30:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:46,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:30:46,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:46,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:46,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:46,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:46,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:46,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:46,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:46,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:46,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:46,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:46,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:46,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:46,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 19:30:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:46,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:46,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:46,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:46,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:46,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:46,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:46,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:46,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:46,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:46,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:46,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496669599] [2020-10-26 19:30:46,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:46,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:30:46,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543275426] [2020-10-26 19:30:46,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:30:46,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:46,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:30:46,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:30:46,840 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 18 states. [2020-10-26 19:30:47,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:47,083 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-26 19:30:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:30:47,084 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-10-26 19:30:47,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:47,085 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:30:47,085 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:30:47,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:30:47,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:30:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-26 19:30:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:30:47,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-26 19:30:47,090 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 50 [2020-10-26 19:30:47,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:47,091 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-26 19:30:47,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:30:47,091 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-26 19:30:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:30:47,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:47,092 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:47,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:30:47,092 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:47,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1606906222, now seen corresponding path program 15 times [2020-10-26 19:30:47,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:47,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482600421] [2020-10-26 19:30:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:47,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:47,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:51,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:51,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:30:51,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:51,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4613 [2020-10-26 19:30:51,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:30:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:51,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:30:51,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:51,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:51,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:52,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:52,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:52,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:52,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:30:52,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:52,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:52,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:52,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:52,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:52,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-26 19:30:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:52,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:52,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:52,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:52,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:52,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:30:52,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:52,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:52,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:52,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:52,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:52,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482600421] [2020-10-26 19:30:52,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:52,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:30:52,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577143771] [2020-10-26 19:30:52,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:30:52,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:52,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:30:52,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:30:52,026 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 19 states. [2020-10-26 19:30:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:52,278 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-10-26 19:30:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:30:52,279 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-10-26 19:30:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:52,280 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:30:52,280 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:30:52,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:30:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:30:52,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-26 19:30:52,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:30:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-26 19:30:52,294 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 52 [2020-10-26 19:30:52,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:52,294 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-26 19:30:52,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:30:52,294 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-26 19:30:52,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:30:52,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:52,297 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:52,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:30:52,298 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:52,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:52,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2103919372, now seen corresponding path program 16 times [2020-10-26 19:30:52,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:52,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001555607] [2020-10-26 19:30:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:52,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:52,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:57,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:57,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:30:57,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:57,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4792 [2020-10-26 19:30:57,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:57,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:30:57,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:57,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:30:57,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:57,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:57,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:57,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:57,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:57,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:57,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:57,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:57,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:57,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:57,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:57,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 19:30:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:57,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:57,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:57,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:30:57,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:57,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:30:57,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:57,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:57,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:30:57,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:57,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:30:57,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001555607] [2020-10-26 19:30:57,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:57,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:30:57,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795429999] [2020-10-26 19:30:57,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:30:57,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:57,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:30:57,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:30:57,497 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 20 states. [2020-10-26 19:30:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:57,891 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-10-26 19:30:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:30:57,892 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-10-26 19:30:57,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:57,894 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:30:57,894 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:30:57,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:30:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:30:57,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-26 19:30:57,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:30:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-26 19:30:57,906 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 54 [2020-10-26 19:30:57,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:57,906 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-26 19:30:57,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:30:57,906 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-26 19:30:57,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:30:57,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:57,909 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:57,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:30:57,909 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:57,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:57,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1302780630, now seen corresponding path program 17 times [2020-10-26 19:30:57,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:57,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639699862] [2020-10-26 19:30:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:57,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:57,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:02,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:02,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:31:02,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:02,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:31:02,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:02,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:31:02,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:02,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:31:02,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:03,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:03,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:03,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:03,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:03,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:03,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:31:03,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:03,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:03,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:03,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:03,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:03,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-26 19:31:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:03,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:03,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:03,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:31:03,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:03,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:31:03,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:03,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:03,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:31:03,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:03,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:03,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639699862] [2020-10-26 19:31:03,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:03,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:31:03,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377615062] [2020-10-26 19:31:03,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:31:03,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:03,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:31:03,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:31:03,363 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 21 states. [2020-10-26 19:31:03,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:03,701 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-10-26 19:31:03,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:31:03,702 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-10-26 19:31:03,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:03,703 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:31:03,703 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:31:03,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:31:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:31:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-26 19:31:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:31:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-10-26 19:31:03,713 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 56 [2020-10-26 19:31:03,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:03,714 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-10-26 19:31:03,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:31:03,714 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-10-26 19:31:03,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:31:03,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:03,715 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:03,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:31:03,715 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:03,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1918564296, now seen corresponding path program 18 times [2020-10-26 19:31:03,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:03,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859725667] [2020-10-26 19:31:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:03,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:03,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:08,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:08,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:31:08,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:08,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:31:08,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:08,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:31:08,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:08,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:31:08,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:09,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:09,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:09,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:09,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:09,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:09,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:31:09,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:09,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:09,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:09,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 19:31:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:09,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:09,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:09,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:31:09,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:09,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:31:09,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:31:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:09,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:09,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859725667] [2020-10-26 19:31:09,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:09,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:31:09,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038461877] [2020-10-26 19:31:09,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:31:09,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:09,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:31:09,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:31:09,117 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 22 states. [2020-10-26 19:31:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:09,408 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-10-26 19:31:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:31:09,408 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-10-26 19:31:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:09,409 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:31:09,409 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:31:09,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:31:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:31:09,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-26 19:31:09,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:31:09,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-26 19:31:09,418 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 58 [2020-10-26 19:31:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:09,419 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-26 19:31:09,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:31:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-26 19:31:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:31:09,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:09,420 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:09,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:31:09,423 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:09,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:09,423 INFO L82 PathProgramCache]: Analyzing trace with hash -959617766, now seen corresponding path program 19 times [2020-10-26 19:31:09,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:09,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492445597] [2020-10-26 19:31:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:09,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:09,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:14,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:14,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:31:14,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:14,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:31:14,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:31:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:31:14,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:14,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:14,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:14,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:14,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:14,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:14,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:14,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:14,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:14,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:14,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:14,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:14,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 19:31:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:14,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:14,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:14,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:31:14,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:14,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:14,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:14,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:14,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:31:14,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:14,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:14,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492445597] [2020-10-26 19:31:14,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:14,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:31:14,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267833817] [2020-10-26 19:31:14,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:31:14,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:14,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:31:14,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:31:14,852 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 23 states. [2020-10-26 19:31:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:15,182 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-10-26 19:31:15,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:31:15,182 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2020-10-26 19:31:15,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:15,183 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:31:15,184 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:31:15,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:31:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:31:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 19:31:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:31:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-10-26 19:31:15,193 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 60 [2020-10-26 19:31:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:15,193 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-10-26 19:31:15,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:31:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-10-26 19:31:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:31:15,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:15,194 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:15,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:31:15,195 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:15,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:15,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1464996220, now seen corresponding path program 20 times [2020-10-26 19:31:15,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:15,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966848022] [2020-10-26 19:31:15,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:15,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:15,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:20,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:20,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:31:20,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:20,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:31:20,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:20,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:31:20,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:20,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:31:20,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:20,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:20,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:20,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:20,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:20,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:20,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:20,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:20,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:20,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:20,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:20,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:20,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-26 19:31:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:20,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:20,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:20,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:31:20,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:20,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:20,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:20,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:20,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:31:20,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:20,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:20,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966848022] [2020-10-26 19:31:20,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:20,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:31:20,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377757702] [2020-10-26 19:31:20,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:31:20,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:20,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:31:20,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:31:20,646 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 24 states. [2020-10-26 19:31:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:20,858 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-10-26 19:31:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:31:20,858 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-10-26 19:31:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:20,859 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:31:20,859 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:31:20,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:31:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:31:20,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-26 19:31:20,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:31:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-10-26 19:31:20,864 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 62 [2020-10-26 19:31:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:20,865 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-10-26 19:31:20,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:31:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-10-26 19:31:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:31:20,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:20,866 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:20,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:31:20,866 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:20,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:20,866 INFO L82 PathProgramCache]: Analyzing trace with hash -648204962, now seen corresponding path program 21 times [2020-10-26 19:31:20,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:20,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714425017] [2020-10-26 19:31:20,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:20,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:20,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:25,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:25,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:31:25,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:25,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:31:25,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:25,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:31:25,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:25,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:31:25,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:26,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:26,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:26,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:26,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:26,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:26,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:26,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:26,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:26,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:26,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-26 19:31:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:26,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:26,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:26,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:31:26,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:26,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:26,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:26,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:26,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:31:26,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:26,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:26,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714425017] [2020-10-26 19:31:26,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:26,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:31:26,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136974095] [2020-10-26 19:31:26,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:31:26,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:26,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:31:26,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:31:26,338 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 25 states. [2020-10-26 19:31:26,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:26,704 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-10-26 19:31:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:31:26,705 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-10-26 19:31:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:26,706 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:31:26,706 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:31:26,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:31:26,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:31:26,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:31:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:31:26,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-26 19:31:26,712 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 64 [2020-10-26 19:31:26,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:26,712 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-26 19:31:26,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:31:26,712 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-26 19:31:26,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:31:26,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:26,713 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:26,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:31:26,713 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:26,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:26,713 INFO L82 PathProgramCache]: Analyzing trace with hash 84990144, now seen corresponding path program 22 times [2020-10-26 19:31:26,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:26,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969673006] [2020-10-26 19:31:26,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:26,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:26,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:31,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:31,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:31:31,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:31,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:31:31,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:31,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:31:31,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:31,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:31:31,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:32,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:32,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:32,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:32,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:32,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:32,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:32,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:32,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:32,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:32,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:32,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:32,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 19:31:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:32,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:32,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:32,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:31:32,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:32,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:32,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:31:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:32,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:32,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969673006] [2020-10-26 19:31:32,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:32,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:31:32,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348425403] [2020-10-26 19:31:32,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:31:32,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:32,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:31:32,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:31:32,217 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 26 states. [2020-10-26 19:31:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:32,596 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-10-26 19:31:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:31:32,597 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2020-10-26 19:31:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:32,598 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:31:32,598 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:31:32,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:31:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:31:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 19:31:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:31:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-26 19:31:32,605 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 66 [2020-10-26 19:31:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:32,605 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-26 19:31:32,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:31:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-26 19:31:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:31:32,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:32,606 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:32,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:31:32,606 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:32,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:32,607 INFO L82 PathProgramCache]: Analyzing trace with hash 310850466, now seen corresponding path program 23 times [2020-10-26 19:31:32,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:32,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060378076] [2020-10-26 19:31:32,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:32,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:32,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:37,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:37,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:31:37,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:37,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-26 19:31:37,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:37,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:31:37,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:37,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:31:37,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:38,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:38,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:38,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:38,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:38,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:38,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:38,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:38,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:38,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:38,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:38,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:38,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:31:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:38,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:38,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:38,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:31:38,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:38,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:38,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:38,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:38,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:31:38,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:38,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:38,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060378076] [2020-10-26 19:31:38,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:38,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:31:38,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336577267] [2020-10-26 19:31:38,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:31:38,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:38,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:31:38,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:31:38,185 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 27 states. [2020-10-26 19:31:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:38,575 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-10-26 19:31:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:31:38,576 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-10-26 19:31:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:38,577 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:31:38,577 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:31:38,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:31:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:31:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-26 19:31:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:31:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-26 19:31:38,583 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 68 [2020-10-26 19:31:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:38,583 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-26 19:31:38,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:31:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-26 19:31:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:31:38,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:38,584 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:38,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:31:38,584 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:38,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:38,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1680712188, now seen corresponding path program 24 times [2020-10-26 19:31:38,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:38,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639513375] [2020-10-26 19:31:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:38,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:38,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:43,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:43,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:31:43,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:43,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:31:43,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:43,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:31:43,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:43,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:31:43,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:44,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:44,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:44,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:44,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:44,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:44,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:31:44,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:44,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:44,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:44,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:31:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:44,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:44,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:44,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:31:44,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:44,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:44,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:44,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:44,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:31:44,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:44,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:44,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639513375] [2020-10-26 19:31:44,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:44,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:31:44,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295619859] [2020-10-26 19:31:44,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:31:44,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:44,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:31:44,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:31:44,145 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 28 states. [2020-10-26 19:31:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:44,502 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-10-26 19:31:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:31:44,503 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-10-26 19:31:44,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:44,504 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:31:44,504 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:31:44,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:31:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:31:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-26 19:31:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:31:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-10-26 19:31:44,510 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 70 [2020-10-26 19:31:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:44,510 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-10-26 19:31:44,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:31:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-10-26 19:31:44,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:31:44,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:44,511 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:44,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:31:44,512 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:44,512 INFO L82 PathProgramCache]: Analyzing trace with hash -17008666, now seen corresponding path program 25 times [2020-10-26 19:31:44,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:44,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390204358] [2020-10-26 19:31:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:44,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:44,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:49,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:49,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:31:49,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:49,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-26 19:31:49,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:49,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:31:49,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:49,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:31:49,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:50,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:50,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:50,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:50,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:50,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:50,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:50,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:50,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:50,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:50,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:50,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:50,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 19:31:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:50,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:50,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:50,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:31:50,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:50,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:31:50,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:50,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:50,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:31:50,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:50,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:50,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390204358] [2020-10-26 19:31:50,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:50,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:31:50,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180652428] [2020-10-26 19:31:50,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:31:50,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:50,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:31:50,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:31:50,204 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 29 states. [2020-10-26 19:31:50,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:50,555 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-10-26 19:31:50,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:31:50,555 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-10-26 19:31:50,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:50,557 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:31:50,557 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:31:50,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:31:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:31:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-26 19:31:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:31:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-10-26 19:31:50,564 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 72 [2020-10-26 19:31:50,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:50,564 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-10-26 19:31:50,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:31:50,564 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-10-26 19:31:50,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:31:50,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:50,565 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:50,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:31:50,565 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:50,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1074241864, now seen corresponding path program 26 times [2020-10-26 19:31:50,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:50,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987274238] [2020-10-26 19:31:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:50,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:50,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:55,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:55,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:31:55,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:55,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:31:55,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:55,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:31:55,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:55,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:31:55,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:56,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:56,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:56,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:56,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:56,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:56,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:56,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:56,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:56,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:56,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:56,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:56,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-26 19:31:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:56,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:56,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:56,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:31:56,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:56,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:56,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:56,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:56,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:31:56,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:56,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:31:56,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987274238] [2020-10-26 19:31:56,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:56,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:31:56,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688881159] [2020-10-26 19:31:56,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:31:56,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:56,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:31:56,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:31:56,194 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 30 states. [2020-10-26 19:31:56,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:56,481 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-10-26 19:31:56,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:31:56,481 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-10-26 19:31:56,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:56,482 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:31:56,482 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:31:56,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:31:56,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:31:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-26 19:31:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:31:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-10-26 19:31:56,488 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 74 [2020-10-26 19:31:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:56,488 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-10-26 19:31:56,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:31:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-10-26 19:31:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:31:56,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:56,489 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:56,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:31:56,489 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:56,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:56,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1793980970, now seen corresponding path program 27 times [2020-10-26 19:31:56,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:56,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452410958] [2020-10-26 19:31:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:56,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:56,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:01,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:01,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:32:01,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:01,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-26 19:32:01,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:01,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:32:01,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:01,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:32:01,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:02,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:02,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:02,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:02,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:02,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:02,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:02,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:02,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:02,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-26 19:32:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:02,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:02,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:02,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:32:02,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:02,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:02,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:02,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:02,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:32:02,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:02,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:02,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452410958] [2020-10-26 19:32:02,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:02,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:32:02,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659233739] [2020-10-26 19:32:02,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:32:02,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:02,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:32:02,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:32:02,237 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 31 states. [2020-10-26 19:32:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:02,486 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-10-26 19:32:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:32:02,486 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-10-26 19:32:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:02,487 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:32:02,487 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:32:02,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:32:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:32:02,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 19:32:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:32:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-10-26 19:32:02,493 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 76 [2020-10-26 19:32:02,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:02,494 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-10-26 19:32:02,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:32:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-10-26 19:32:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:32:02,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:02,494 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:02,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:32:02,495 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:02,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:02,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1973527180, now seen corresponding path program 28 times [2020-10-26 19:32:02,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:02,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147968785] [2020-10-26 19:32:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:02,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:02,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:07,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:07,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:32:07,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:07,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-26 19:32:07,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:07,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:32:07,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:07,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:32:07,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:08,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:08,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:08,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:08,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:08,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:08,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:32:08,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:08,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:08,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:08,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:32:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:08,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:08,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:08,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:32:08,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:08,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:08,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:08,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:08,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:32:08,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:08,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:08,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147968785] [2020-10-26 19:32:08,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:08,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:32:08,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745475649] [2020-10-26 19:32:08,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:32:08,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:08,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:32:08,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:32:08,260 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 32 states. [2020-10-26 19:32:08,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:08,620 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-10-26 19:32:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:32:08,621 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2020-10-26 19:32:08,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:08,622 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:32:08,622 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:32:08,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:32:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:32:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-26 19:32:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:32:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-10-26 19:32:08,627 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 78 [2020-10-26 19:32:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:08,628 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-10-26 19:32:08,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:32:08,628 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-10-26 19:32:08,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:32:08,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:08,629 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:08,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:32:08,629 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:08,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:08,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1576224146, now seen corresponding path program 29 times [2020-10-26 19:32:08,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:08,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630734305] [2020-10-26 19:32:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:08,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:08,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:13,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:13,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:32:13,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:13,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:32:13,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:13,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:32:13,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:13,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:32:13,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:14,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:14,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:14,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:14,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:14,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:14,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:14,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:14,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:14,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:14,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:14,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:14,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-26 19:32:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:14,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:14,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:14,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:32:14,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:14,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:14,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:14,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:14,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:32:14,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:14,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:14,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630734305] [2020-10-26 19:32:14,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:14,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:32:14,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191512551] [2020-10-26 19:32:14,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:32:14,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:14,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:32:14,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:32:14,389 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 33 states. [2020-10-26 19:32:14,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:14,868 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-10-26 19:32:14,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:32:14,869 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2020-10-26 19:32:14,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:14,870 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:32:14,870 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:32:14,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:32:14,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:32:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:32:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:32:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-10-26 19:32:14,876 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 80 [2020-10-26 19:32:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:14,876 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-10-26 19:32:14,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:32:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-10-26 19:32:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:32:14,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:14,878 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:14,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:32:14,878 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:14,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:14,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1611751888, now seen corresponding path program 30 times [2020-10-26 19:32:14,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:14,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332403570] [2020-10-26 19:32:14,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:14,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:14,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:19,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:19,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:32:19,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:19,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 19:32:19,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:19,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:32:19,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:19,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:32:19,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:20,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:20,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:20,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:20,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:20,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:20,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:20,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:20,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:20,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:20,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:20,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:20,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-26 19:32:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:20,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:20,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:20,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:32:20,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:20,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:20,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:32:20,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:20,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:20,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332403570] [2020-10-26 19:32:20,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:20,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:32:20,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511465354] [2020-10-26 19:32:20,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:32:20,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:20,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:32:20,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:32:20,710 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 34 states. [2020-10-26 19:32:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:21,200 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-10-26 19:32:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:32:21,201 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2020-10-26 19:32:21,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:21,202 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:32:21,202 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:32:21,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:32:21,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:32:21,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-26 19:32:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:32:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-10-26 19:32:21,208 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 82 [2020-10-26 19:32:21,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:21,208 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-10-26 19:32:21,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:32:21,209 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-10-26 19:32:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:32:21,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:21,210 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:21,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:32:21,210 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:21,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1349928782, now seen corresponding path program 31 times [2020-10-26 19:32:21,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:21,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214574938] [2020-10-26 19:32:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:21,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:21,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:26,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:26,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:32:26,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:26,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-10-26 19:32:26,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:26,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:32:26,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:26,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:32:26,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:27,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:27,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:27,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:27,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:27,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:27,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:32:27,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:27,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:27,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:27,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:27,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:27,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:32:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:27,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:27,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:27,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:32:27,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:27,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:27,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:27,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:27,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:32:27,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:27,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:27,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214574938] [2020-10-26 19:32:27,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:27,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:32:27,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342655412] [2020-10-26 19:32:27,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:32:27,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:27,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:32:27,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:32:27,177 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 35 states. [2020-10-26 19:32:27,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:27,507 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-10-26 19:32:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:32:27,508 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-10-26 19:32:27,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:27,509 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:32:27,509 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:32:27,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:32:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:32:27,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:32:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:32:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-10-26 19:32:27,516 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 84 [2020-10-26 19:32:27,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:27,517 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-10-26 19:32:27,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:32:27,517 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-10-26 19:32:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 19:32:27,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:27,518 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:27,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:32:27,518 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:27,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:27,519 INFO L82 PathProgramCache]: Analyzing trace with hash 38264596, now seen corresponding path program 32 times [2020-10-26 19:32:27,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:27,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310182183] [2020-10-26 19:32:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:27,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:27,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:32,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:32,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:32:32,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:32,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-26 19:32:32,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:32,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:32:32,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:32,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:32:32,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:33,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:33,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:33,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:33,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:33,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:33,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:33,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:33,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:33,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:33,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:33,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:33,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:32:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:33,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:33,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:33,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:32:33,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:33,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:33,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:33,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:33,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:32:33,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:33,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:33,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310182183] [2020-10-26 19:32:33,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:33,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:32:33,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028804206] [2020-10-26 19:32:33,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:32:33,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:33,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:32:33,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:32:33,453 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 36 states. [2020-10-26 19:32:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:33,972 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-10-26 19:32:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:32:33,973 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 86 [2020-10-26 19:32:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:33,974 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:32:33,974 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:32:33,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:32:33,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:32:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-26 19:32:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:32:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-10-26 19:32:33,981 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 86 [2020-10-26 19:32:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:33,982 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-10-26 19:32:33,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:32:33,982 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-10-26 19:32:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:32:33,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:33,983 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:33,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:32:33,983 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:33,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:33,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1642728202, now seen corresponding path program 33 times [2020-10-26 19:32:33,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:33,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584865782] [2020-10-26 19:32:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:34,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:34,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:39,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:39,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:32:39,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:39,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 19:32:39,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:32:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:39,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:32:39,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:39,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:39,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:39,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:39,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:39,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:39,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:39,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:39,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:39,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:39,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:39,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:39,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-26 19:32:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:39,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:39,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:39,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:32:39,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:39,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:39,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:39,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:39,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:32:39,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:39,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:39,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584865782] [2020-10-26 19:32:39,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:39,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:32:39,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152686083] [2020-10-26 19:32:39,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:32:39,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:39,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:32:39,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:32:39,965 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 37 states. [2020-10-26 19:32:40,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:40,415 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-10-26 19:32:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:32:40,415 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2020-10-26 19:32:40,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:40,417 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:32:40,417 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:32:40,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:32:40,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:32:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-26 19:32:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:32:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-26 19:32:40,424 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 88 [2020-10-26 19:32:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:40,424 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-26 19:32:40,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:32:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-26 19:32:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:32:40,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:40,425 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:40,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:32:40,425 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:40,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:40,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2125863512, now seen corresponding path program 34 times [2020-10-26 19:32:40,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:40,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338685893] [2020-10-26 19:32:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:40,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:40,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:45,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:45,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:32:45,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:45,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:32:45,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:45,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:32:45,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:45,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:32:45,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:46,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:46,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:46,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:46,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:46,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:46,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:46,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:46,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:46,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:46,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-26 19:32:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:46,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:46,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:46,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:32:46,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:46,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:46,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:32:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:46,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:46,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338685893] [2020-10-26 19:32:46,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:46,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:32:46,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620586693] [2020-10-26 19:32:46,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:32:46,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:46,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:32:46,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:32:46,404 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 38 states. [2020-10-26 19:32:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:46,715 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-10-26 19:32:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:32:46,716 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-10-26 19:32:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:46,717 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:32:46,717 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:32:46,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:32:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:32:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-26 19:32:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:32:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-10-26 19:32:46,727 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 90 [2020-10-26 19:32:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:46,728 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-10-26 19:32:46,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:32:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-10-26 19:32:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:32:46,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:46,729 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:46,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:32:46,729 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:46,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:46,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1209897158, now seen corresponding path program 35 times [2020-10-26 19:32:46,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:46,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649696860] [2020-10-26 19:32:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:46,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:46,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:51,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:51,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:32:51,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:51,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5089 [2020-10-26 19:32:51,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:51,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:32:51,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:51,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:32:51,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:52,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:52,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:52,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:52,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:52,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:52,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:32:52,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:52,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:52,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:52,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:52,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:52,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:32:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:52,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:52,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:52,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:32:52,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:52,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:52,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:32:52,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:52,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:52,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649696860] [2020-10-26 19:32:52,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:52,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:32:52,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622864617] [2020-10-26 19:32:52,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:32:52,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:52,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:32:52,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:32:52,841 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 39 states. [2020-10-26 19:32:53,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:53,046 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-10-26 19:32:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:32:53,047 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-10-26 19:32:53,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:53,048 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:32:53,048 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:32:53,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:32:53,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:32:53,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-26 19:32:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:32:53,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-10-26 19:32:53,055 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 92 [2020-10-26 19:32:53,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:53,055 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-10-26 19:32:53,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:32:53,055 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-10-26 19:32:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 19:32:53,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:53,056 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:53,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:32:53,056 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:53,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1464669084, now seen corresponding path program 36 times [2020-10-26 19:32:53,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:53,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726050714] [2020-10-26 19:32:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:53,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:53,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:58,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:58,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:32:58,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:58,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-26 19:32:58,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:58,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:32:58,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:58,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:32:58,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:59,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:59,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:59,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:59,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:59,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:59,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:59,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:59,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:59,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:59,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:59,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:59,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-26 19:32:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:59,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:59,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:59,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:32:59,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:59,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:59,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:59,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:59,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:32:59,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:59,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:32:59,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726050714] [2020-10-26 19:32:59,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:59,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:32:59,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140672121] [2020-10-26 19:32:59,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:32:59,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:59,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:32:59,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:32:59,189 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 40 states. [2020-10-26 19:32:59,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:59,752 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-10-26 19:32:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:32:59,753 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 94 [2020-10-26 19:32:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:59,754 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:32:59,754 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:32:59,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:32:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:32:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-26 19:32:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:32:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-10-26 19:32:59,761 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 94 [2020-10-26 19:32:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:59,761 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-10-26 19:32:59,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:32:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-10-26 19:32:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-26 19:32:59,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:59,763 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:59,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:32:59,763 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:59,763 INFO L82 PathProgramCache]: Analyzing trace with hash -962582658, now seen corresponding path program 37 times [2020-10-26 19:32:59,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:59,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723378976] [2020-10-26 19:32:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:59,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:59,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:04,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:04,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:33:04,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:04,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:33:04,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:04,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:33:04,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:04,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:33:04,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:05,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:05,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:05,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:05,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:05,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:05,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:05,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:05,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:05,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:05,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:05,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:05,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-26 19:33:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:05,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:05,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:05,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:33:05,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:05,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:05,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:05,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:05,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:33:05,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:05,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:05,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723378976] [2020-10-26 19:33:05,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:05,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:33:05,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372349475] [2020-10-26 19:33:05,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:33:05,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:05,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:33:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:33:05,928 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 41 states. [2020-10-26 19:33:06,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:06,180 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-10-26 19:33:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:33:06,180 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 96 [2020-10-26 19:33:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:06,181 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:33:06,181 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:33:06,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:33:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:33:06,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-26 19:33:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:33:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-10-26 19:33:06,187 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 96 [2020-10-26 19:33:06,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:06,187 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-10-26 19:33:06,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:33:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-10-26 19:33:06,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:33:06,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:06,188 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:06,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:33:06,189 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:06,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1384264992, now seen corresponding path program 38 times [2020-10-26 19:33:06,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:06,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43874371] [2020-10-26 19:33:06,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:06,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:06,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:11,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:11,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 19:33:11,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:11,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-26 19:33:11,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:11,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:33:11,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:11,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:33:11,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:12,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:12,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:12,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:12,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:12,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:12,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:12,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:12,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:12,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 19:33:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:12,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:12,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:12,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:33:12,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:12,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:12,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:12,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:12,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:33:12,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:12,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:12,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43874371] [2020-10-26 19:33:12,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:12,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:33:12,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882807110] [2020-10-26 19:33:12,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:33:12,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:12,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:33:12,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:33:12,399 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 42 states. [2020-10-26 19:33:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:12,770 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-10-26 19:33:12,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:33:12,771 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2020-10-26 19:33:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:12,772 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:33:12,772 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:33:12,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:33:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:33:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-26 19:33:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:33:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-10-26 19:33:12,778 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 98 [2020-10-26 19:33:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:12,778 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-10-26 19:33:12,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:33:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-10-26 19:33:12,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 19:33:12,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:12,779 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:12,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:33:12,779 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:12,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:12,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1400905154, now seen corresponding path program 39 times [2020-10-26 19:33:12,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:12,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261066083] [2020-10-26 19:33:12,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:12,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:12,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:17,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:17,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:33:17,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:17,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-26 19:33:17,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:17,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:33:17,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:17,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:33:17,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:19,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:19,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:19,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:19,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:19,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:19,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:19,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:19,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:19,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-26 19:33:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:19,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:19,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:19,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:33:19,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:19,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:19,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:19,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:19,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:33:19,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:19,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:19,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261066083] [2020-10-26 19:33:19,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:19,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:33:19,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394230373] [2020-10-26 19:33:19,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:33:19,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:19,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:33:19,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:33:19,114 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 43 states. [2020-10-26 19:33:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:19,681 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2020-10-26 19:33:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:33:19,682 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 100 [2020-10-26 19:33:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:19,683 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:33:19,683 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:33:19,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:33:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:33:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-26 19:33:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:33:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-10-26 19:33:19,690 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 100 [2020-10-26 19:33:19,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:19,691 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-10-26 19:33:19,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:33:19,691 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-10-26 19:33:19,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:33:19,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:19,692 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:19,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:33:19,692 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:19,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:19,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2110177244, now seen corresponding path program 40 times [2020-10-26 19:33:19,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:19,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130746021] [2020-10-26 19:33:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:19,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:19,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:24,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:24,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:33:24,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:24,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5079 [2020-10-26 19:33:24,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:24,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:33:24,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:24,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:33:24,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:26,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:26,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:26,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:26,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:26,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:26,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:26,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:26,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:26,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:26,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:26,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:26,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 19:33:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:26,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:26,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:26,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:33:26,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:26,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:26,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:26,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:26,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:33:26,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:26,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:26,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130746021] [2020-10-26 19:33:26,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:26,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:33:26,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48602362] [2020-10-26 19:33:26,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:33:26,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:26,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:33:26,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:33:26,068 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 44 states. [2020-10-26 19:33:26,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:26,650 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2020-10-26 19:33:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:33:26,650 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 102 [2020-10-26 19:33:26,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:26,652 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:33:26,652 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:33:26,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:33:26,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:33:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-26 19:33:26,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:33:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2020-10-26 19:33:26,659 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 102 [2020-10-26 19:33:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:26,659 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2020-10-26 19:33:26,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:33:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2020-10-26 19:33:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 19:33:26,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:26,660 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:26,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:33:26,660 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:26,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:26,661 INFO L82 PathProgramCache]: Analyzing trace with hash -416067066, now seen corresponding path program 41 times [2020-10-26 19:33:26,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:26,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832864948] [2020-10-26 19:33:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:26,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:26,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:31,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:31,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 19:33:31,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:31,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5132 [2020-10-26 19:33:31,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:31,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:33:31,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:31,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:33:31,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:33,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:33,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:33,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:33,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:33,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:33,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:33:33,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:33,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:33,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:33,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:33,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:33,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 19:33:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:33,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:33,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:33,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:33:33,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:33,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:33,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:33,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:33,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:33:33,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:33,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:33,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832864948] [2020-10-26 19:33:33,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:33,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:33:33,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440174232] [2020-10-26 19:33:33,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:33:33,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:33:33,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:33:33,198 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 45 states. [2020-10-26 19:33:33,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:33,718 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-26 19:33:33,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:33:33,719 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 104 [2020-10-26 19:33:33,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:33,721 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:33:33,721 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:33:33,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:33:33,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:33:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-26 19:33:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:33:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-10-26 19:33:33,728 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 104 [2020-10-26 19:33:33,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:33,728 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-10-26 19:33:33,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:33:33,729 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-10-26 19:33:33,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:33:33,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:33,729 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:33,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:33:33,730 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:33,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:33,730 INFO L82 PathProgramCache]: Analyzing trace with hash -168791192, now seen corresponding path program 42 times [2020-10-26 19:33:33,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:33,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058570677] [2020-10-26 19:33:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:33,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:33,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:38,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:38,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 19:33:38,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:38,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-26 19:33:38,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:38,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:33:38,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:38,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:33:38,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:40,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:40,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:40,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:40,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:40,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:40,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:40,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:40,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:40,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:40,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:40,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:40,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-26 19:33:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:40,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:40,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:40,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:33:40,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:40,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:33:40,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:40,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:40,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:33:40,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:40,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:40,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058570677] [2020-10-26 19:33:40,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:40,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:33:40,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906319369] [2020-10-26 19:33:40,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:33:40,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:40,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:33:40,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:33:40,222 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 46 states. [2020-10-26 19:33:40,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:40,520 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2020-10-26 19:33:40,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:33:40,521 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 106 [2020-10-26 19:33:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:40,522 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:33:40,522 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:33:40,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:33:40,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:33:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-26 19:33:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-26 19:33:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2020-10-26 19:33:40,530 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 106 [2020-10-26 19:33:40,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:40,530 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2020-10-26 19:33:40,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:33:40,530 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2020-10-26 19:33:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 19:33:40,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:40,531 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:40,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:33:40,532 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1240122442, now seen corresponding path program 43 times [2020-10-26 19:33:40,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:40,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772783096] [2020-10-26 19:33:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:40,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:45,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:45,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:33:45,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:45,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5140 [2020-10-26 19:33:45,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:45,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 19:33:45,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:45,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 19:33:45,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:47,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:47,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:47,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:47,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:47,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:47,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:47,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:47,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:47,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:47,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:47,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:47,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-26 19:33:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:47,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:47,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:47,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:33:47,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:47,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:47,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:33:47,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:47,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:47,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772783096] [2020-10-26 19:33:47,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:47,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:33:47,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866103434] [2020-10-26 19:33:47,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:33:47,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:47,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:33:47,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:33:47,165 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand 47 states. [2020-10-26 19:33:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:47,844 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-10-26 19:33:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:33:47,844 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 108 [2020-10-26 19:33:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:47,846 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:33:47,846 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:33:47,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:33:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:33:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-26 19:33:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:33:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-10-26 19:33:47,852 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 108 [2020-10-26 19:33:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:47,852 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-10-26 19:33:47,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:33:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-10-26 19:33:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-26 19:33:47,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:47,853 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:47,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:33:47,854 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:47,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:47,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2003540820, now seen corresponding path program 44 times [2020-10-26 19:33:47,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:47,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793257965] [2020-10-26 19:33:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:47,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:47,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:52,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:52,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 19:33:52,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:33:52,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-26 19:33:52,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:52,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-26 19:33:52,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:52,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:33:52,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:54,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:54,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:54,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:54,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:54,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:54,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:54,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:54,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:54,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:54,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:54,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:54,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-26 19:33:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:54,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:54,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:54,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:33:54,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:54,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:33:54,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:54,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:54,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:33:54,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:54,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:33:54,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793257965] [2020-10-26 19:33:54,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:54,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-26 19:33:54,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641145453] [2020-10-26 19:33:54,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-26 19:33:54,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:54,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-26 19:33:54,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:33:54,482 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 48 states. [2020-10-26 19:33:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:55,151 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2020-10-26 19:33:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-26 19:33:55,151 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 110 [2020-10-26 19:33:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:55,153 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:33:55,153 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:33:55,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:33:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:33:55,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-26 19:33:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:33:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2020-10-26 19:33:55,158 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 110 [2020-10-26 19:33:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:55,159 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2020-10-26 19:33:55,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-26 19:33:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2020-10-26 19:33:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:33:55,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:55,160 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:55,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:33:55,160 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:55,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1017678706, now seen corresponding path program 45 times [2020-10-26 19:33:55,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:55,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710170727] [2020-10-26 19:33:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:55,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:55,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:00,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:00,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-26 19:34:00,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:34:00,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-26 19:34:00,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-26 19:34:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 19:34:00,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:01,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:01,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:01,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:01,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:01,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:01,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:01,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:01,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:01,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:01,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:01,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:01,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-26 19:34:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:01,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:01,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:01,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:34:01,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:01,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:01,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:34:01,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:01,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:34:01,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710170727] [2020-10-26 19:34:01,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:01,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-26 19:34:01,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114573741] [2020-10-26 19:34:01,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-26 19:34:01,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:01,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-26 19:34:01,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:34:01,898 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand 49 states. [2020-10-26 19:34:02,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:02,558 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2020-10-26 19:34:02,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-26 19:34:02,558 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 112 [2020-10-26 19:34:02,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:02,560 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:34:02,560 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:34:02,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:34:02,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:34:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-26 19:34:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-26 19:34:02,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2020-10-26 19:34:02,565 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 112 [2020-10-26 19:34:02,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:02,566 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2020-10-26 19:34:02,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-26 19:34:02,566 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2020-10-26 19:34:02,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 19:34:02,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:02,567 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:02,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:34:02,567 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:02,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:02,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1503007728, now seen corresponding path program 46 times [2020-10-26 19:34:02,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:02,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788881958] [2020-10-26 19:34:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:02,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:02,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:07,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:07,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-26 19:34:07,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:34:07,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 19:34:07,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:07,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-26 19:34:07,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:34:07,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 19:34:07,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:09,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:34:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:09,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:09,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:09,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:34:09,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:09,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:34:09,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:09,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:09,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:34:09,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:09,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:09,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-26 19:34:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:09,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:09,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:34:09,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 19:34:09,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:34:09,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:34:09,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:34:09,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:34:09,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 19:34:09,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:34:09,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:34:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:34:09,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788881958] [2020-10-26 19:34:09,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:34:09,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-26 19:34:09,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468369486] [2020-10-26 19:34:09,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-26 19:34:09,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:34:09,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-26 19:34:09,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:34:09,295 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand 50 states. [2020-10-26 19:34:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:34:09,996 INFO L93 Difference]: Finished difference Result 146 states and 152 transitions. [2020-10-26 19:34:09,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:34:09,997 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 114 [2020-10-26 19:34:09,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:34:09,998 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:34:09,998 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:34:09,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:34:10,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:34:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-26 19:34:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:34:10,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2020-10-26 19:34:10,005 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 114 [2020-10-26 19:34:10,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:34:10,005 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2020-10-26 19:34:10,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-26 19:34:10,005 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2020-10-26 19:34:10,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-26 19:34:10,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:34:10,006 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:34:10,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-26 19:34:10,006 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:34:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:34:10,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1521115858, now seen corresponding path program 47 times [2020-10-26 19:34:10,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:34:10,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810781143] [2020-10-26 19:34:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:34:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:34:10,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:34:10,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking...