/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:29:11,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:29:11,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:29:11,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:29:11,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:29:11,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:29:11,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:29:11,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:29:11,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:29:11,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:29:11,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:29:11,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:29:11,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:29:11,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:29:11,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:29:11,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:29:11,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:29:11,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:29:11,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:29:11,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:29:11,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:29:11,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:29:11,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:29:11,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:29:11,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:29:11,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:29:11,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:29:11,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:29:11,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:29:11,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:29:11,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:29:11,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:29:11,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:29:11,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:29:11,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:29:11,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:29:11,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:29:11,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:29:11,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:29:11,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:29:11,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:29:11,432 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:29:11,459 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:29:11,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:29:11,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:29:11,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:29:11,462 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:29:11,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:29:11,462 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:29:11,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:29:11,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:29:11,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:29:11,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:29:11,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:29:11,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:29:11,464 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:29:11,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:29:11,464 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:29:11,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:29:11,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:29:11,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:29:11,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:29:11,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:29:11,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:29:11,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:29:11,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:29:11,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:29:11,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:29:11,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:29:11,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:29:11,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:29:11,467 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:29:11,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:29:11,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:29:11,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:29:11,950 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:29:11,951 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:29:11,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2020-10-27 20:29:12,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a81073301/05c747a1cbcc42d5b5c08a00cbe1330d/FLAGc9af23350 [2020-10-27 20:29:12,714 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:29:12,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2020-10-27 20:29:12,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a81073301/05c747a1cbcc42d5b5c08a00cbe1330d/FLAGc9af23350 [2020-10-27 20:29:13,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a81073301/05c747a1cbcc42d5b5c08a00cbe1330d [2020-10-27 20:29:13,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:29:13,075 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:29:13,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:29:13,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:29:13,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:29:13,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:29:13" (1/1) ... [2020-10-27 20:29:13,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b49fab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:13, skipping insertion in model container [2020-10-27 20:29:13,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:29:13" (1/1) ... [2020-10-27 20:29:13,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:29:13,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:29:13,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:29:13,286 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:29:13,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:29:13,322 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:29:13,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:13 WrapperNode [2020-10-27 20:29:13,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:29:13,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:29:13,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:29:13,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:29:13,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:13" (1/1) ... [2020-10-27 20:29:13,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:13" (1/1) ... [2020-10-27 20:29:13,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:13" (1/1) ... [2020-10-27 20:29:13,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:13" (1/1) ... [2020-10-27 20:29:13,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:13" (1/1) ... [2020-10-27 20:29:13,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:13" (1/1) ... [2020-10-27 20:29:13,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:13" (1/1) ... [2020-10-27 20:29:13,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:29:13,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:29:13,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:29:13,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:29:13,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:29:13,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:29:13,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:29:13,454 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:29:13,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:29:13,454 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:29:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:29:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:29:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:29:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:29:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:29:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:29:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:29:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:29:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:29:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:29:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:29:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:29:13,892 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:29:13,892 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:29:13,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:29:13 BoogieIcfgContainer [2020-10-27 20:29:13,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:29:13,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:29:13,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:29:13,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:29:13,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:29:13" (1/3) ... [2020-10-27 20:29:13,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270ab067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:29:13, skipping insertion in model container [2020-10-27 20:29:13,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:29:13" (2/3) ... [2020-10-27 20:29:13,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270ab067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:29:13, skipping insertion in model container [2020-10-27 20:29:13,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:29:13" (3/3) ... [2020-10-27 20:29:13,906 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2020-10-27 20:29:13,919 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:29:13,923 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:29:13,938 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:29:13,984 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:29:13,984 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:29:13,984 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:29:13,984 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:29:13,984 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:29:13,985 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:29:13,985 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:29:13,985 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:29:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-27 20:29:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:29:14,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:14,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:14,036 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:14,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:14,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2071267928, now seen corresponding path program 1 times [2020-10-27 20:29:14,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:14,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409197825] [2020-10-27 20:29:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:14,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:14,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:14,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:29:14,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:14,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 20:29:14,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:14,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:14,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:29:14,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:14,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:29:14,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:14,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:14,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:14,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:14,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:14,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 20:29:14,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:14,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:14,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:14,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:14,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:14,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409197825] [2020-10-27 20:29:14,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:29:14,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:29:14,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477291529] [2020-10-27 20:29:14,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:29:14,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:14,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:29:14,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:29:14,592 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-27 20:29:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:14,662 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-27 20:29:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:29:14,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 20:29:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:14,672 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:29:14,673 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 20:29:14,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:29:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 20:29:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 20:29:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:29:14,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-27 20:29:14,721 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-10-27 20:29:14,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:14,721 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-27 20:29:14,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:29:14,721 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-27 20:29:14,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:29:14,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:14,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:14,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:29:14,723 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:14,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1584572361, now seen corresponding path program 1 times [2020-10-27 20:29:14,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:14,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010457027] [2020-10-27 20:29:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:14,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:14,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:14,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:29:14,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:14,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 20:29:14,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:14,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:29:14,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:29:14,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:29:14,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:14,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:14,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:14,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:14,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:14,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:14,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:29:14,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:14,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:14,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:14,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:14,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:14,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010457027] [2020-10-27 20:29:14,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:29:14,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:29:14,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759875826] [2020-10-27 20:29:14,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:29:14,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:14,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:29:14,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:29:14,974 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-10-27 20:29:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:15,087 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-10-27 20:29:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:29:15,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 20:29:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:15,089 INFO L225 Difference]: With dead ends: 28 [2020-10-27 20:29:15,089 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:29:15,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:29:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:29:15,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 20:29:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:29:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-27 20:29:15,098 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2020-10-27 20:29:15,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:15,099 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-27 20:29:15,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:29:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-27 20:29:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 20:29:15,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:15,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:15,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:29:15,100 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:15,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1703269908, now seen corresponding path program 1 times [2020-10-27 20:29:15,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:15,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122969421] [2020-10-27 20:29:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:15,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:15,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:15,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 20:29:15,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:15,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-27 20:29:15,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:15,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:29:15,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 20:29:15,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:29:15,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:29:15,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:15,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:15,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:15,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:15,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:15,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 20:29:15,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:15,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:15,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:15,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:15,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:29:15,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122969421] [2020-10-27 20:29:15,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:29:15,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:29:15,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194768170] [2020-10-27 20:29:15,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:29:15,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:15,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:29:15,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:29:15,254 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-10-27 20:29:15,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:15,380 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-10-27 20:29:15,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:29:15,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-27 20:29:15,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:15,382 INFO L225 Difference]: With dead ends: 31 [2020-10-27 20:29:15,383 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:29:15,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:29:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:29:15,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 20:29:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 20:29:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-27 20:29:15,403 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2020-10-27 20:29:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:15,404 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-27 20:29:15,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:29:15,404 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-27 20:29:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:29:15,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:15,405 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:15,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:29:15,405 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:15,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1085784629, now seen corresponding path program 1 times [2020-10-27 20:29:15,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:15,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229377411] [2020-10-27 20:29:15,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:15,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:15,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:15,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:15,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:29:15,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:29:15,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-27 20:29:15,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:15,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:29:15,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:15,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:29:15,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:29:15,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:15,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:15,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:15,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:15,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:15,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:29:15,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:15,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:15,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:15,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:15,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:15,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229377411] [2020-10-27 20:29:15,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:29:15,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:29:15,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483459976] [2020-10-27 20:29:15,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:29:15,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:15,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:29:15,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:29:15,682 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2020-10-27 20:29:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:15,771 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-27 20:29:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:29:15,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 20:29:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:15,774 INFO L225 Difference]: With dead ends: 31 [2020-10-27 20:29:15,775 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:29:15,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:29:15,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:29:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-27 20:29:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 20:29:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-27 20:29:15,799 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-27 20:29:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:15,799 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-27 20:29:15,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:29:15,800 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-27 20:29:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:29:15,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:15,801 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:15,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:29:15,801 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:15,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:15,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1305450564, now seen corresponding path program 1 times [2020-10-27 20:29:15,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:15,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691398303] [2020-10-27 20:29:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:15,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:15,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:15,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:15,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:16,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:16,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:29:16,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:16,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-27 20:29:16,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:16,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:29:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:16,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:29:16,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:16,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:16,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:16,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:16,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:16,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:16,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:29:16,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:16,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:16,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:16,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:16,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:16,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691398303] [2020-10-27 20:29:16,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:16,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:29:16,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945133937] [2020-10-27 20:29:16,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:29:16,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:16,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:29:16,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:29:16,214 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-10-27 20:29:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:16,407 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-27 20:29:16,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:29:16,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 20:29:16,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:16,409 INFO L225 Difference]: With dead ends: 35 [2020-10-27 20:29:16,409 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:29:16,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:29:16,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:29:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-27 20:29:16,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 20:29:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-27 20:29:16,426 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 22 [2020-10-27 20:29:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:16,427 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-27 20:29:16,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:29:16,427 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-27 20:29:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:29:16,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:16,429 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:16,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:29:16,429 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:16,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1002638909, now seen corresponding path program 2 times [2020-10-27 20:29:16,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:16,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453363667] [2020-10-27 20:29:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:16,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:16,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:16,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:16,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:16,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:16,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:29:16,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:16,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-27 20:29:16,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:16,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:29:16,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:16,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:29:16,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:16,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:16,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:16,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:16,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:16,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:16,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:16,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:16,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:16,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:16,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:16,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:16,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453363667] [2020-10-27 20:29:16,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:16,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:29:16,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837092195] [2020-10-27 20:29:16,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:29:16,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:16,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:29:16,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:29:16,922 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 6 states. [2020-10-27 20:29:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:17,101 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-10-27 20:29:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:29:17,102 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-27 20:29:17,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:17,103 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:29:17,103 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:29:17,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:29:17,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:29:17,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-27 20:29:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 20:29:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-10-27 20:29:17,111 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 26 [2020-10-27 20:29:17,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:17,111 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-10-27 20:29:17,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:29:17,112 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-10-27 20:29:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:29:17,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:17,113 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:17,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:29:17,113 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:17,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1990778806, now seen corresponding path program 3 times [2020-10-27 20:29:17,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:17,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69711118] [2020-10-27 20:29:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:17,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:17,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:17,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:17,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:17,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:17,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:29:17,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:17,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-27 20:29:17,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:29:17,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:17,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 20:29:17,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:17,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:17,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:17,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:17,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:17,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:17,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:29:17,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:17,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:17,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:17,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:17,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:17,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69711118] [2020-10-27 20:29:17,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:17,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:29:17,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424091122] [2020-10-27 20:29:17,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:29:17,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:17,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:29:17,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:29:17,514 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 7 states. [2020-10-27 20:29:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:17,764 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-10-27 20:29:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:29:17,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-27 20:29:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:17,766 INFO L225 Difference]: With dead ends: 43 [2020-10-27 20:29:17,766 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 20:29:17,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:29:17,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 20:29:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-27 20:29:17,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 20:29:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-10-27 20:29:17,782 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 30 [2020-10-27 20:29:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:17,782 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-10-27 20:29:17,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:29:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-10-27 20:29:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:29:17,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:17,784 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:17,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:29:17,785 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1055345839, now seen corresponding path program 4 times [2020-10-27 20:29:17,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:17,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897323384] [2020-10-27 20:29:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:17,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:17,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:17,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:17,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:18,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:18,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 20:29:18,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:18,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-27 20:29:18,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:18,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:29:18,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:18,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 20:29:18,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:18,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:18,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:18,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:18,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:18,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:18,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:29:18,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:18,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:18,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:18,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:18,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:18,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897323384] [2020-10-27 20:29:18,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:18,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:29:18,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644791091] [2020-10-27 20:29:18,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:29:18,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:18,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:29:18,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:29:18,290 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 8 states. [2020-10-27 20:29:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:18,570 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2020-10-27 20:29:18,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:29:18,571 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-27 20:29:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:18,572 INFO L225 Difference]: With dead ends: 47 [2020-10-27 20:29:18,572 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 20:29:18,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:29:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 20:29:18,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-27 20:29:18,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 20:29:18,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2020-10-27 20:29:18,581 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 34 [2020-10-27 20:29:18,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:18,581 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2020-10-27 20:29:18,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:29:18,581 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2020-10-27 20:29:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 20:29:18,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:18,583 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:18,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:29:18,583 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:18,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1211853528, now seen corresponding path program 5 times [2020-10-27 20:29:18,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:18,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338974301] [2020-10-27 20:29:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:18,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:18,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:18,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:18,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:18,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:18,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 20:29:18,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:18,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-27 20:29:18,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:18,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:29:18,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:18,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:29:18,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:19,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:19,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:19,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:19,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:19,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:19,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:29:19,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:19,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:19,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:19,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:19,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 27 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:19,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338974301] [2020-10-27 20:29:19,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:19,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:29:19,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403758119] [2020-10-27 20:29:19,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:29:19,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:19,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:29:19,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:29:19,044 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 9 states. [2020-10-27 20:29:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:19,434 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-10-27 20:29:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:29:19,434 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-27 20:29:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:19,436 INFO L225 Difference]: With dead ends: 51 [2020-10-27 20:29:19,436 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 20:29:19,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:29:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 20:29:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-27 20:29:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:29:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 56 transitions. [2020-10-27 20:29:19,443 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 56 transitions. Word has length 38 [2020-10-27 20:29:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:19,444 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 56 transitions. [2020-10-27 20:29:19,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:29:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 56 transitions. [2020-10-27 20:29:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:29:19,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:19,445 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:19,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:29:19,446 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:19,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:19,446 INFO L82 PathProgramCache]: Analyzing trace with hash -2003237153, now seen corresponding path program 6 times [2020-10-27 20:29:19,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:19,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994454889] [2020-10-27 20:29:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:19,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:19,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:19,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:19,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:19,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:19,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:29:19,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:19,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 513 [2020-10-27 20:29:19,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:19,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:29:19,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:19,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 20:29:19,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:20,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:20,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:20,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:20,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:20,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:20,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:20,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:20,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 32 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:20,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994454889] [2020-10-27 20:29:20,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:20,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:29:20,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096323065] [2020-10-27 20:29:20,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:29:20,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:20,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:29:20,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:29:20,123 INFO L87 Difference]: Start difference. First operand 43 states and 56 transitions. Second operand 10 states. [2020-10-27 20:29:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:20,573 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-10-27 20:29:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:29:20,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-27 20:29:20,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:20,575 INFO L225 Difference]: With dead ends: 55 [2020-10-27 20:29:20,575 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 20:29:20,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:29:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 20:29:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-27 20:29:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 20:29:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2020-10-27 20:29:20,584 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 42 [2020-10-27 20:29:20,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:20,584 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2020-10-27 20:29:20,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:29:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2020-10-27 20:29:20,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 20:29:20,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:20,586 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:20,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:29:20,586 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:20,587 INFO L82 PathProgramCache]: Analyzing trace with hash -383039642, now seen corresponding path program 7 times [2020-10-27 20:29:20,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:20,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203780953] [2020-10-27 20:29:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:20,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:20,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:21,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 20:29:21,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:21,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 611 [2020-10-27 20:29:21,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:21,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:29:21,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:21,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 20:29:21,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:21,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:21,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:21,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:21,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:21,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:21,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:21,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:21,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:21,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:21,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 37 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:21,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203780953] [2020-10-27 20:29:21,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:21,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:29:21,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922684995] [2020-10-27 20:29:21,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:29:21,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:21,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:29:21,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:29:21,354 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand 11 states. [2020-10-27 20:29:21,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:21,890 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2020-10-27 20:29:21,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:29:21,891 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-27 20:29:21,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:21,893 INFO L225 Difference]: With dead ends: 59 [2020-10-27 20:29:21,893 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 20:29:21,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:29:21,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 20:29:21,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-10-27 20:29:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 20:29:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2020-10-27 20:29:21,911 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 46 [2020-10-27 20:29:21,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:21,911 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2020-10-27 20:29:21,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:29:21,912 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2020-10-27 20:29:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 20:29:21,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:21,915 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:21,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:29:21,916 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:21,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1040968813, now seen corresponding path program 8 times [2020-10-27 20:29:21,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:21,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051252758] [2020-10-27 20:29:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:21,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:21,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:22,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:22,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:22,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 20:29:22,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:22,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-10-27 20:29:22,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:22,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:29:22,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:22,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 20:29:22,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:22,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:22,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:22,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:22,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:22,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:22,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:22,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:22,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:22,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:22,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:22,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 42 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:22,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051252758] [2020-10-27 20:29:22,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:22,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 20:29:22,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792368619] [2020-10-27 20:29:22,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:29:22,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:22,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:29:22,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:29:22,657 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand 12 states. [2020-10-27 20:29:23,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:23,192 INFO L93 Difference]: Finished difference Result 63 states and 84 transitions. [2020-10-27 20:29:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:29:23,193 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-27 20:29:23,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:23,197 INFO L225 Difference]: With dead ends: 63 [2020-10-27 20:29:23,197 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 20:29:23,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:29:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 20:29:23,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-10-27 20:29:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 20:29:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2020-10-27 20:29:23,213 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 50 [2020-10-27 20:29:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:23,214 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2020-10-27 20:29:23,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:29:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2020-10-27 20:29:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 20:29:23,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:23,216 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:23,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:29:23,219 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:23,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:23,220 INFO L82 PathProgramCache]: Analyzing trace with hash 947172852, now seen corresponding path program 9 times [2020-10-27 20:29:23,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:23,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494556682] [2020-10-27 20:29:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:23,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:23,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 20:29:23,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:23,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-27 20:29:23,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:23,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:29:23,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:23,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 20:29:23,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:23,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:23,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:23,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:23,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:23,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:23,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:29:23,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:23,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:23,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:23,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:23,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 47 proven. 162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:24,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494556682] [2020-10-27 20:29:24,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:24,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:29:24,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118527880] [2020-10-27 20:29:24,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:29:24,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:24,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:29:24,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:29:24,018 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand 13 states. [2020-10-27 20:29:24,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:24,611 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-10-27 20:29:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:29:24,611 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-27 20:29:24,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:24,612 INFO L225 Difference]: With dead ends: 67 [2020-10-27 20:29:24,612 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 20:29:24,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:29:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 20:29:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-10-27 20:29:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 20:29:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2020-10-27 20:29:24,621 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 54 [2020-10-27 20:29:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:24,622 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2020-10-27 20:29:24,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:29:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2020-10-27 20:29:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 20:29:24,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:24,623 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:24,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:29:24,623 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:24,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:24,624 INFO L82 PathProgramCache]: Analyzing trace with hash -692100101, now seen corresponding path program 10 times [2020-10-27 20:29:24,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:24,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219436220] [2020-10-27 20:29:24,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:24,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:24,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:24,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:24,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:25,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:25,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 20:29:25,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:25,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 859 [2020-10-27 20:29:25,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:25,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:29:25,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:25,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 20:29:25,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:25,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:25,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:25,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:25,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:25,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:25,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:25,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:25,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:25,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:25,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:25,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 52 proven. 200 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:25,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219436220] [2020-10-27 20:29:25,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:25,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:29:25,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122139966] [2020-10-27 20:29:25,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:29:25,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:25,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:29:25,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:29:25,673 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand 14 states. [2020-10-27 20:29:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:26,336 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2020-10-27 20:29:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:29:26,336 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-10-27 20:29:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:26,338 INFO L225 Difference]: With dead ends: 71 [2020-10-27 20:29:26,338 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 20:29:26,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:29:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 20:29:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2020-10-27 20:29:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 20:29:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2020-10-27 20:29:26,349 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 58 [2020-10-27 20:29:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:26,350 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2020-10-27 20:29:26,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:29:26,350 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2020-10-27 20:29:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 20:29:26,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:26,351 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:26,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:29:26,351 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:26,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:26,352 INFO L82 PathProgramCache]: Analyzing trace with hash -731531646, now seen corresponding path program 11 times [2020-10-27 20:29:26,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:26,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044538052] [2020-10-27 20:29:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:26,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:26,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:26,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:26,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:27,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:27,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 20:29:27,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:27,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 661 [2020-10-27 20:29:27,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:27,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 20:29:27,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:27,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 20:29:27,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:27,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:27,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:27,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:27,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:27,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:27,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:27,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:27,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:27,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:27,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:27,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 57 proven. 242 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:27,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044538052] [2020-10-27 20:29:27,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:27,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 20:29:27,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493242326] [2020-10-27 20:29:27,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 20:29:27,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:27,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 20:29:27,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:29:27,221 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand 15 states. [2020-10-27 20:29:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:27,945 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2020-10-27 20:29:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 20:29:27,945 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-10-27 20:29:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:27,946 INFO L225 Difference]: With dead ends: 75 [2020-10-27 20:29:27,946 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 20:29:27,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:29:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 20:29:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-27 20:29:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 20:29:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 92 transitions. [2020-10-27 20:29:27,962 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 92 transitions. Word has length 62 [2020-10-27 20:29:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:27,964 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 92 transitions. [2020-10-27 20:29:27,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 20:29:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 92 transitions. [2020-10-27 20:29:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 20:29:27,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:27,967 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:27,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:29:27,967 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:27,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:27,968 INFO L82 PathProgramCache]: Analyzing trace with hash 436301193, now seen corresponding path program 12 times [2020-10-27 20:29:27,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:27,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127125840] [2020-10-27 20:29:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:27,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:28,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:28,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:28,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:28,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:28,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 20:29:28,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:28,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-27 20:29:28,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 20:29:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:28,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 20:29:28,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:28,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:28,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:28,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:28,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:28,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:28,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:28,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:28,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:28,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 62 proven. 288 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:28,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127125840] [2020-10-27 20:29:28,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:28,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 20:29:28,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226691848] [2020-10-27 20:29:28,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 20:29:28,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:28,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 20:29:28,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 20:29:28,990 INFO L87 Difference]: Start difference. First operand 67 states and 92 transitions. Second operand 16 states. [2020-10-27 20:29:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:29,849 INFO L93 Difference]: Finished difference Result 79 states and 108 transitions. [2020-10-27 20:29:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 20:29:29,850 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-27 20:29:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:29,851 INFO L225 Difference]: With dead ends: 79 [2020-10-27 20:29:29,851 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 20:29:29,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:29:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 20:29:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-27 20:29:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 20:29:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 98 transitions. [2020-10-27 20:29:29,869 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 98 transitions. Word has length 66 [2020-10-27 20:29:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:29,870 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 98 transitions. [2020-10-27 20:29:29,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 20:29:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 98 transitions. [2020-10-27 20:29:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 20:29:29,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:29,873 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:29,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:29:29,875 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:29,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:29,876 INFO L82 PathProgramCache]: Analyzing trace with hash 759974160, now seen corresponding path program 13 times [2020-10-27 20:29:29,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:29,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364330565] [2020-10-27 20:29:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:29,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:29,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:29,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:30,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:30,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:30,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 20:29:30,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:30,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 863 [2020-10-27 20:29:30,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:30,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:29:30,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:30,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 20:29:30,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:30,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:30,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:30,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:30,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:30,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:30,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:30,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:30,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:30,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:30,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:30,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 67 proven. 338 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:30,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364330565] [2020-10-27 20:29:30,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:30,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:29:30,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043192370] [2020-10-27 20:29:30,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:29:30,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:31,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:29:31,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:29:31,001 INFO L87 Difference]: Start difference. First operand 71 states and 98 transitions. Second operand 17 states. [2020-10-27 20:29:31,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:31,844 INFO L93 Difference]: Finished difference Result 83 states and 114 transitions. [2020-10-27 20:29:31,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:29:31,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-10-27 20:29:31,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:31,845 INFO L225 Difference]: With dead ends: 83 [2020-10-27 20:29:31,845 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 20:29:31,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:29:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 20:29:31,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2020-10-27 20:29:31,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 20:29:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 104 transitions. [2020-10-27 20:29:31,855 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 104 transitions. Word has length 70 [2020-10-27 20:29:31,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:31,855 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 104 transitions. [2020-10-27 20:29:31,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:29:31,856 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 104 transitions. [2020-10-27 20:29:31,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 20:29:31,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:31,857 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:31,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:29:31,857 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:31,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1591736041, now seen corresponding path program 14 times [2020-10-27 20:29:31,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:31,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200205917] [2020-10-27 20:29:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:31,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:31,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:32,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:32,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:32,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:32,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 20:29:32,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 824 [2020-10-27 20:29:32,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 20:29:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 20:29:32,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:32,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:32,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:32,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:32,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:32,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:32,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:32,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:32,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:32,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:32,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:32,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 72 proven. 392 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:32,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200205917] [2020-10-27 20:29:32,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:32,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 20:29:32,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147791557] [2020-10-27 20:29:32,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 20:29:32,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:32,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 20:29:32,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 20:29:32,967 INFO L87 Difference]: Start difference. First operand 75 states and 104 transitions. Second operand 18 states. [2020-10-27 20:29:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:33,913 INFO L93 Difference]: Finished difference Result 87 states and 120 transitions. [2020-10-27 20:29:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 20:29:33,913 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 74 [2020-10-27 20:29:33,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:33,915 INFO L225 Difference]: With dead ends: 87 [2020-10-27 20:29:33,915 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 20:29:33,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:29:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 20:29:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-10-27 20:29:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 20:29:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 110 transitions. [2020-10-27 20:29:33,937 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 110 transitions. Word has length 74 [2020-10-27 20:29:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:33,938 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 110 transitions. [2020-10-27 20:29:33,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 20:29:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 110 transitions. [2020-10-27 20:29:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 20:29:33,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:33,941 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:33,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:29:33,941 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:33,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:33,942 INFO L82 PathProgramCache]: Analyzing trace with hash -2055836258, now seen corresponding path program 15 times [2020-10-27 20:29:33,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:33,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447590863] [2020-10-27 20:29:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:33,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:33,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:34,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:34,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:34,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:34,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 20:29:34,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:34,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 972 [2020-10-27 20:29:34,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:34,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 20:29:34,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:34,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 20:29:34,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:35,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:35,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:35,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:35,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:35,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:35,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:35,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:35,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:35,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:35,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:35,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 77 proven. 450 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:35,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447590863] [2020-10-27 20:29:35,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:35,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 20:29:35,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186871828] [2020-10-27 20:29:35,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 20:29:35,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:35,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 20:29:35,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:29:35,235 INFO L87 Difference]: Start difference. First operand 79 states and 110 transitions. Second operand 19 states. [2020-10-27 20:29:36,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:36,309 INFO L93 Difference]: Finished difference Result 91 states and 126 transitions. [2020-10-27 20:29:36,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 20:29:36,310 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-10-27 20:29:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:36,311 INFO L225 Difference]: With dead ends: 91 [2020-10-27 20:29:36,311 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:29:36,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:29:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:29:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2020-10-27 20:29:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 20:29:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 116 transitions. [2020-10-27 20:29:36,325 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 116 transitions. Word has length 78 [2020-10-27 20:29:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:36,326 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 116 transitions. [2020-10-27 20:29:36,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 20:29:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 116 transitions. [2020-10-27 20:29:36,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 20:29:36,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:36,328 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:36,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:29:36,328 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:36,328 INFO L82 PathProgramCache]: Analyzing trace with hash -680970587, now seen corresponding path program 16 times [2020-10-27 20:29:36,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:36,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456985503] [2020-10-27 20:29:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:36,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:36,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:36,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:36,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:37,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:37,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 20:29:37,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:37,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1210 [2020-10-27 20:29:37,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:37,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 20:29:37,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:37,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 20:29:37,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:37,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:37,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:37,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:37,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:37,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:37,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:37,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:37,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:37,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:37,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:37,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 82 proven. 512 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:37,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456985503] [2020-10-27 20:29:37,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:37,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 20:29:37,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487803661] [2020-10-27 20:29:37,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 20:29:37,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:37,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 20:29:37,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 20:29:37,873 INFO L87 Difference]: Start difference. First operand 83 states and 116 transitions. Second operand 20 states. [2020-10-27 20:29:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:39,053 INFO L93 Difference]: Finished difference Result 95 states and 132 transitions. [2020-10-27 20:29:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 20:29:39,053 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 82 [2020-10-27 20:29:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:39,055 INFO L225 Difference]: With dead ends: 95 [2020-10-27 20:29:39,055 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 20:29:39,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:29:39,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 20:29:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-10-27 20:29:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 20:29:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2020-10-27 20:29:39,064 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 82 [2020-10-27 20:29:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:39,064 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2020-10-27 20:29:39,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 20:29:39,065 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2020-10-27 20:29:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 20:29:39,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:39,065 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:39,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:29:39,066 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:39,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:39,066 INFO L82 PathProgramCache]: Analyzing trace with hash -248372180, now seen corresponding path program 17 times [2020-10-27 20:29:39,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:39,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244814344] [2020-10-27 20:29:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:39,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:39,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:39,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:39,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:40,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:40,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 20:29:40,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:40,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1135 [2020-10-27 20:29:40,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:40,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 20:29:40,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:40,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 20:29:40,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:40,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:40,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:40,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:40,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:40,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:40,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:40,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:40,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:40,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:40,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:40,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:29:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 87 proven. 578 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:40,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244814344] [2020-10-27 20:29:40,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:40,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 20:29:40,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221339836] [2020-10-27 20:29:40,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 20:29:40,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:40,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 20:29:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:29:40,598 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand 21 states. [2020-10-27 20:29:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:41,823 INFO L93 Difference]: Finished difference Result 99 states and 138 transitions. [2020-10-27 20:29:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 20:29:41,823 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 86 [2020-10-27 20:29:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:41,824 INFO L225 Difference]: With dead ends: 99 [2020-10-27 20:29:41,824 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 20:29:41,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:29:41,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 20:29:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2020-10-27 20:29:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 20:29:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 128 transitions. [2020-10-27 20:29:41,832 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 128 transitions. Word has length 86 [2020-10-27 20:29:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:41,833 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 128 transitions. [2020-10-27 20:29:41,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 20:29:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 128 transitions. [2020-10-27 20:29:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 20:29:41,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:41,834 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:41,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:29:41,834 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:41,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:41,835 INFO L82 PathProgramCache]: Analyzing trace with hash -97847757, now seen corresponding path program 18 times [2020-10-27 20:29:41,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:41,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399515367] [2020-10-27 20:29:41,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:41,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:41,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:41,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:41,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:42,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:42,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 20:29:42,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:42,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-27 20:29:42,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:42,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 20:29:42,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:42,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 20:29:42,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:42,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:42,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:42,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:42,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:42,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:42,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:42,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:42,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:42,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:42,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:42,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 92 proven. 648 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:42,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399515367] [2020-10-27 20:29:42,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:42,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 20:29:42,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182744887] [2020-10-27 20:29:42,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 20:29:42,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:42,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 20:29:42,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 20:29:42,885 INFO L87 Difference]: Start difference. First operand 91 states and 128 transitions. Second operand 22 states. [2020-10-27 20:29:44,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:44,155 INFO L93 Difference]: Finished difference Result 103 states and 144 transitions. [2020-10-27 20:29:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 20:29:44,159 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 90 [2020-10-27 20:29:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:44,160 INFO L225 Difference]: With dead ends: 103 [2020-10-27 20:29:44,161 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 20:29:44,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:29:44,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 20:29:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-10-27 20:29:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 20:29:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 134 transitions. [2020-10-27 20:29:44,168 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 134 transitions. Word has length 90 [2020-10-27 20:29:44,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:44,169 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 134 transitions. [2020-10-27 20:29:44,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 20:29:44,169 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 134 transitions. [2020-10-27 20:29:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 20:29:44,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:44,170 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:44,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:29:44,170 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:44,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1456303290, now seen corresponding path program 19 times [2020-10-27 20:29:44,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:44,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025083567] [2020-10-27 20:29:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:44,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:44,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:44,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:44,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:44,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:44,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 20:29:44,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:44,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-27 20:29:44,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:44,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 20:29:44,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:44,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 20:29:44,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:45,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:45,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:45,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:45,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:45,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:45,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:45,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:45,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:45,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:45,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:45,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 97 proven. 722 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:45,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025083567] [2020-10-27 20:29:45,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:45,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 20:29:45,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615848248] [2020-10-27 20:29:45,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 20:29:45,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:45,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 20:29:45,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:29:45,120 INFO L87 Difference]: Start difference. First operand 95 states and 134 transitions. Second operand 23 states. [2020-10-27 20:29:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:46,484 INFO L93 Difference]: Finished difference Result 107 states and 150 transitions. [2020-10-27 20:29:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 20:29:46,485 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 94 [2020-10-27 20:29:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:46,487 INFO L225 Difference]: With dead ends: 107 [2020-10-27 20:29:46,487 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 20:29:46,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:29:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 20:29:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2020-10-27 20:29:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 20:29:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 140 transitions. [2020-10-27 20:29:46,498 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 140 transitions. Word has length 94 [2020-10-27 20:29:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:46,499 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 140 transitions. [2020-10-27 20:29:46,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 20:29:46,499 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 140 transitions. [2020-10-27 20:29:46,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 20:29:46,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:46,500 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:46,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:29:46,500 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:46,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:46,501 INFO L82 PathProgramCache]: Analyzing trace with hash 414402497, now seen corresponding path program 20 times [2020-10-27 20:29:46,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:46,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499813045] [2020-10-27 20:29:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:46,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:46,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:46,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:46,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:47,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:47,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 20:29:47,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:47,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 791 [2020-10-27 20:29:47,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:47,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 20:29:47,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:47,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 20:29:47,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:47,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:47,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:47,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:47,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:47,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:47,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:29:47,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:47,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:47,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:47,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:47,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 102 proven. 800 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:47,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499813045] [2020-10-27 20:29:47,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:47,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 20:29:47,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455885282] [2020-10-27 20:29:47,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 20:29:47,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:47,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 20:29:47,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 20:29:47,751 INFO L87 Difference]: Start difference. First operand 99 states and 140 transitions. Second operand 24 states. [2020-10-27 20:29:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:49,192 INFO L93 Difference]: Finished difference Result 111 states and 156 transitions. [2020-10-27 20:29:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 20:29:49,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 98 [2020-10-27 20:29:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:49,194 INFO L225 Difference]: With dead ends: 111 [2020-10-27 20:29:49,194 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 20:29:49,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:29:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 20:29:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2020-10-27 20:29:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 20:29:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 146 transitions. [2020-10-27 20:29:49,203 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 146 transitions. Word has length 98 [2020-10-27 20:29:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:49,204 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 146 transitions. [2020-10-27 20:29:49,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 20:29:49,204 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 146 transitions. [2020-10-27 20:29:49,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 20:29:49,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:49,205 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:49,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:29:49,205 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:49,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:49,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1855342408, now seen corresponding path program 21 times [2020-10-27 20:29:49,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:49,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560855294] [2020-10-27 20:29:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:49,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:49,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:49,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:49,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:49,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:49,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 20:29:49,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:49,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 702 [2020-10-27 20:29:49,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:49,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 20:29:49,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:49,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 20:29:49,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:50,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:50,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:50,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:50,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:50,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:50,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:29:50,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:50,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:50,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:50,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:50,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 991 backedges. 107 proven. 882 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:50,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560855294] [2020-10-27 20:29:50,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:50,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 20:29:50,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516301595] [2020-10-27 20:29:50,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 20:29:50,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:50,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 20:29:50,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:29:50,373 INFO L87 Difference]: Start difference. First operand 103 states and 146 transitions. Second operand 25 states. [2020-10-27 20:29:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:51,919 INFO L93 Difference]: Finished difference Result 115 states and 162 transitions. [2020-10-27 20:29:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 20:29:51,920 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 102 [2020-10-27 20:29:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:51,921 INFO L225 Difference]: With dead ends: 115 [2020-10-27 20:29:51,922 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 20:29:51,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:29:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 20:29:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-10-27 20:29:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 20:29:51,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 152 transitions. [2020-10-27 20:29:51,929 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 152 transitions. Word has length 102 [2020-10-27 20:29:51,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:51,930 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 152 transitions. [2020-10-27 20:29:51,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 20:29:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 152 transitions. [2020-10-27 20:29:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 20:29:51,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:51,931 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:51,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 20:29:51,931 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:51,931 INFO L82 PathProgramCache]: Analyzing trace with hash 340798287, now seen corresponding path program 22 times [2020-10-27 20:29:51,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:51,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485648710] [2020-10-27 20:29:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:51,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:51,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:52,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 20:29:52,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:52,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-10-27 20:29:52,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:52,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 20:29:52,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:52,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-27 20:29:52,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:52,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:52,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:52,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:52,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:52,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:52,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:52,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:52,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:52,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:52,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:52,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 112 proven. 968 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:52,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485648710] [2020-10-27 20:29:52,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:52,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 20:29:52,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436168307] [2020-10-27 20:29:52,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 20:29:52,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:52,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 20:29:52,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 20:29:52,943 INFO L87 Difference]: Start difference. First operand 107 states and 152 transitions. Second operand 26 states. [2020-10-27 20:29:54,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:54,557 INFO L93 Difference]: Finished difference Result 119 states and 168 transitions. [2020-10-27 20:29:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 20:29:54,557 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 106 [2020-10-27 20:29:54,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:54,559 INFO L225 Difference]: With dead ends: 119 [2020-10-27 20:29:54,559 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 20:29:54,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:29:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 20:29:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2020-10-27 20:29:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 20:29:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 158 transitions. [2020-10-27 20:29:54,567 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 158 transitions. Word has length 106 [2020-10-27 20:29:54,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:54,567 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 158 transitions. [2020-10-27 20:29:54,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 20:29:54,567 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 158 transitions. [2020-10-27 20:29:54,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 20:29:54,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:54,569 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:54,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 20:29:54,569 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:54,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:54,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1025854506, now seen corresponding path program 23 times [2020-10-27 20:29:54,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:54,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362562263] [2020-10-27 20:29:54,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:54,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:54,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:54,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:54,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:55,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:55,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 20:29:55,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:55,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 654 [2020-10-27 20:29:55,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:55,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 20:29:55,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:55,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 20:29:55,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:55,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:55,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:55,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:55,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:55,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:55,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:29:55,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:55,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:55,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:55,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:55,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-10-27 20:29:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 117 proven. 1058 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:55,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362562263] [2020-10-27 20:29:55,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:55,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 20:29:55,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340141475] [2020-10-27 20:29:55,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 20:29:55,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:55,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 20:29:55,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 20:29:55,763 INFO L87 Difference]: Start difference. First operand 111 states and 158 transitions. Second operand 27 states. [2020-10-27 20:29:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:29:57,512 INFO L93 Difference]: Finished difference Result 123 states and 174 transitions. [2020-10-27 20:29:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 20:29:57,513 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 110 [2020-10-27 20:29:57,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:29:57,514 INFO L225 Difference]: With dead ends: 123 [2020-10-27 20:29:57,514 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 20:29:57,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:29:57,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 20:29:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2020-10-27 20:29:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 20:29:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 164 transitions. [2020-10-27 20:29:57,522 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 164 transitions. Word has length 110 [2020-10-27 20:29:57,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:29:57,522 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 164 transitions. [2020-10-27 20:29:57,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 20:29:57,523 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 164 transitions. [2020-10-27 20:29:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 20:29:57,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:29:57,524 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:29:57,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 20:29:57,524 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:29:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:29:57,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1605394211, now seen corresponding path program 24 times [2020-10-27 20:29:57,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:29:57,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967813487] [2020-10-27 20:29:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:29:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:57,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:57,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:57,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:57,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:58,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:58,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 20:29:58,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:29:58,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-27 20:29:58,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 20:29:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:29:58,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 20:29:58,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:58,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:29:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:29:58,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:29:58,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:29:58,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:29:58,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:29:58,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:29:58,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:29:58,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:29:58,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:29:58,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:29:58,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:29:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 122 proven. 1152 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:29:58,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967813487] [2020-10-27 20:29:58,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:29:58,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 20:29:58,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589178329] [2020-10-27 20:29:58,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 20:29:58,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:29:58,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 20:29:58,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 20:29:58,924 INFO L87 Difference]: Start difference. First operand 115 states and 164 transitions. Second operand 28 states. [2020-10-27 20:30:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:00,743 INFO L93 Difference]: Finished difference Result 127 states and 180 transitions. [2020-10-27 20:30:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 20:30:00,744 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 114 [2020-10-27 20:30:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:00,745 INFO L225 Difference]: With dead ends: 127 [2020-10-27 20:30:00,745 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 20:30:00,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:30:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 20:30:00,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2020-10-27 20:30:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 20:30:00,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 170 transitions. [2020-10-27 20:30:00,754 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 170 transitions. Word has length 114 [2020-10-27 20:30:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:00,754 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 170 transitions. [2020-10-27 20:30:00,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 20:30:00,755 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 170 transitions. [2020-10-27 20:30:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-27 20:30:00,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:00,756 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:00,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 20:30:00,756 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:00,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1343704476, now seen corresponding path program 25 times [2020-10-27 20:30:00,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:00,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853789166] [2020-10-27 20:30:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:00,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:00,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:00,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:00,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:01,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:01,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 20:30:01,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:30:01,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 996 [2020-10-27 20:30:01,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 20:30:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:30:01,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 20:30:01,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:02,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:02,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:02,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:02,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:02,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:02,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:02,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:02,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:02,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:02,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:02,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 127 proven. 1250 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:30:02,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853789166] [2020-10-27 20:30:02,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:02,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 20:30:02,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613627552] [2020-10-27 20:30:02,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 20:30:02,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:02,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 20:30:02,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 20:30:02,351 INFO L87 Difference]: Start difference. First operand 119 states and 170 transitions. Second operand 29 states. [2020-10-27 20:30:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:04,304 INFO L93 Difference]: Finished difference Result 131 states and 186 transitions. [2020-10-27 20:30:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:30:04,304 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 118 [2020-10-27 20:30:04,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:04,306 INFO L225 Difference]: With dead ends: 131 [2020-10-27 20:30:04,306 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 20:30:04,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:30:04,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 20:30:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2020-10-27 20:30:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 20:30:04,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 176 transitions. [2020-10-27 20:30:04,316 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 176 transitions. Word has length 118 [2020-10-27 20:30:04,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:04,316 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 176 transitions. [2020-10-27 20:30:04,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 20:30:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 176 transitions. [2020-10-27 20:30:04,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 20:30:04,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:04,318 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:04,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 20:30:04,318 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:04,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1107273835, now seen corresponding path program 26 times [2020-10-27 20:30:04,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:04,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778505110] [2020-10-27 20:30:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:04,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:04,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:04,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:04,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:05,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:05,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 20:30:05,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:30:05,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 911 [2020-10-27 20:30:05,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 20:30:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:30:05,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 20:30:05,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:05,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:05,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:05,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:05,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:05,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:05,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:05,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:05,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:05,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:05,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:05,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1486 backedges. 132 proven. 1352 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:30:05,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778505110] [2020-10-27 20:30:05,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:05,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 20:30:05,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672090861] [2020-10-27 20:30:05,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 20:30:05,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:05,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 20:30:05,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 20:30:05,859 INFO L87 Difference]: Start difference. First operand 123 states and 176 transitions. Second operand 30 states. [2020-10-27 20:30:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:07,899 INFO L93 Difference]: Finished difference Result 135 states and 192 transitions. [2020-10-27 20:30:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 20:30:07,899 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 122 [2020-10-27 20:30:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:07,901 INFO L225 Difference]: With dead ends: 135 [2020-10-27 20:30:07,901 INFO L226 Difference]: Without dead ends: 129 [2020-10-27 20:30:07,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 20:30:07,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-27 20:30:07,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2020-10-27 20:30:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 20:30:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 182 transitions. [2020-10-27 20:30:07,911 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 182 transitions. Word has length 122 [2020-10-27 20:30:07,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:07,911 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 182 transitions. [2020-10-27 20:30:07,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 20:30:07,911 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 182 transitions. [2020-10-27 20:30:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 20:30:07,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:07,913 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:07,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 20:30:07,914 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:07,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1678656242, now seen corresponding path program 27 times [2020-10-27 20:30:07,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:07,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642377661] [2020-10-27 20:30:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:07,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:07,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:07,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:08,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:08,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:08,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 20:30:08,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:30:08,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 745 [2020-10-27 20:30:08,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:08,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 20:30:08,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:30:08,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 20:30:08,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:09,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:09,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:09,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:09,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:09,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:09,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:09,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:09,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:09,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 137 proven. 1458 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:30:09,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642377661] [2020-10-27 20:30:09,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:09,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 20:30:09,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608780307] [2020-10-27 20:30:09,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 20:30:09,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:09,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 20:30:09,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 20:30:09,357 INFO L87 Difference]: Start difference. First operand 127 states and 182 transitions. Second operand 31 states. [2020-10-27 20:30:11,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:11,434 INFO L93 Difference]: Finished difference Result 139 states and 198 transitions. [2020-10-27 20:30:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 20:30:11,436 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 126 [2020-10-27 20:30:11,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:11,437 INFO L225 Difference]: With dead ends: 139 [2020-10-27 20:30:11,437 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 20:30:11,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 20:30:11,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 20:30:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2020-10-27 20:30:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 20:30:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 188 transitions. [2020-10-27 20:30:11,446 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 188 transitions. Word has length 126 [2020-10-27 20:30:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:11,446 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 188 transitions. [2020-10-27 20:30:11,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 20:30:11,446 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 188 transitions. [2020-10-27 20:30:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 20:30:11,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:11,447 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:11,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 20:30:11,447 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1353597433, now seen corresponding path program 28 times [2020-10-27 20:30:11,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:11,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237649462] [2020-10-27 20:30:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:11,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:11,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:11,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:11,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:12,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:12,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-27 20:30:12,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:30:12,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-10-27 20:30:12,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:12,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 20:30:12,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:30:12,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 20:30:12,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:13,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:13,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:13,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:13,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:13,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:13,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:30:13,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:13,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:13,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:13,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:13,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 142 proven. 1568 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:30:13,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237649462] [2020-10-27 20:30:13,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:13,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 20:30:13,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422432003] [2020-10-27 20:30:13,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 20:30:13,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:13,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 20:30:13,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 20:30:13,162 INFO L87 Difference]: Start difference. First operand 131 states and 188 transitions. Second operand 32 states. [2020-10-27 20:30:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:15,363 INFO L93 Difference]: Finished difference Result 143 states and 204 transitions. [2020-10-27 20:30:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 20:30:15,364 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 130 [2020-10-27 20:30:15,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:15,366 INFO L225 Difference]: With dead ends: 143 [2020-10-27 20:30:15,366 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 20:30:15,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 20:30:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 20:30:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2020-10-27 20:30:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 20:30:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 194 transitions. [2020-10-27 20:30:15,376 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 194 transitions. Word has length 130 [2020-10-27 20:30:15,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:15,376 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 194 transitions. [2020-10-27 20:30:15,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 20:30:15,376 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 194 transitions. [2020-10-27 20:30:15,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-27 20:30:15,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:15,377 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:15,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 20:30:15,378 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:15,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:15,378 INFO L82 PathProgramCache]: Analyzing trace with hash -543595136, now seen corresponding path program 29 times [2020-10-27 20:30:15,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:15,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097716213] [2020-10-27 20:30:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:15,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:15,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:15,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:15,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:16,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:16,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 20:30:16,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:30:16,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1096 [2020-10-27 20:30:16,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:16,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 20:30:16,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:30:16,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-27 20:30:16,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:17,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:17,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:17,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:17,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:17,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:17,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:17,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:17,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:17,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:17,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1831 backedges. 147 proven. 1682 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:30:17,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097716213] [2020-10-27 20:30:17,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:17,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 20:30:17,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534491986] [2020-10-27 20:30:17,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 20:30:17,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:17,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 20:30:17,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 20:30:17,257 INFO L87 Difference]: Start difference. First operand 135 states and 194 transitions. Second operand 33 states. [2020-10-27 20:30:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:19,601 INFO L93 Difference]: Finished difference Result 147 states and 210 transitions. [2020-10-27 20:30:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 20:30:19,601 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 134 [2020-10-27 20:30:19,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:19,603 INFO L225 Difference]: With dead ends: 147 [2020-10-27 20:30:19,603 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 20:30:19,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 20:30:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 20:30:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2020-10-27 20:30:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 20:30:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 200 transitions. [2020-10-27 20:30:19,612 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 200 transitions. Word has length 134 [2020-10-27 20:30:19,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:19,613 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 200 transitions. [2020-10-27 20:30:19,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 20:30:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 200 transitions. [2020-10-27 20:30:19,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 20:30:19,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:19,614 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:19,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 20:30:19,614 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:19,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:19,615 INFO L82 PathProgramCache]: Analyzing trace with hash -173445753, now seen corresponding path program 30 times [2020-10-27 20:30:19,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:19,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461692341] [2020-10-27 20:30:19,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:19,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:19,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:19,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:19,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:20,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:20,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 20:30:20,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:30:20,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-10-27 20:30:20,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 20:30:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:30:20,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-27 20:30:20,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:21,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:21,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:21,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:21,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:21,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:21,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:21,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:21,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:21,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1954 backedges. 152 proven. 1800 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:30:21,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461692341] [2020-10-27 20:30:21,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:21,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 20:30:21,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013965731] [2020-10-27 20:30:21,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 20:30:21,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:21,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 20:30:21,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 20:30:21,162 INFO L87 Difference]: Start difference. First operand 139 states and 200 transitions. Second operand 34 states. [2020-10-27 20:30:23,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:23,509 INFO L93 Difference]: Finished difference Result 151 states and 216 transitions. [2020-10-27 20:30:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 20:30:23,509 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 138 [2020-10-27 20:30:23,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:23,512 INFO L225 Difference]: With dead ends: 151 [2020-10-27 20:30:23,513 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 20:30:23,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 20:30:23,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 20:30:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2020-10-27 20:30:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 20:30:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 206 transitions. [2020-10-27 20:30:23,523 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 206 transitions. Word has length 138 [2020-10-27 20:30:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:23,523 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 206 transitions. [2020-10-27 20:30:23,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 20:30:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 206 transitions. [2020-10-27 20:30:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-27 20:30:23,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:23,524 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:23,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 20:30:23,525 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:23,525 INFO L82 PathProgramCache]: Analyzing trace with hash -187164146, now seen corresponding path program 31 times [2020-10-27 20:30:23,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:23,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228740585] [2020-10-27 20:30:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:23,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:23,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:23,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:23,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:24,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:24,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 20:30:24,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:30:24,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 938 [2020-10-27 20:30:24,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:24,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 20:30:24,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:30:24,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-27 20:30:24,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:25,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:25,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:25,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:25,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:25,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:25,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:25,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:25,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:25,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:25,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:25,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 157 proven. 1922 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:30:25,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228740585] [2020-10-27 20:30:25,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:25,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 20:30:25,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7233589] [2020-10-27 20:30:25,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 20:30:25,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:25,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 20:30:25,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 20:30:25,304 INFO L87 Difference]: Start difference. First operand 143 states and 206 transitions. Second operand 35 states. [2020-10-27 20:30:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:27,862 INFO L93 Difference]: Finished difference Result 155 states and 222 transitions. [2020-10-27 20:30:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 20:30:27,863 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 142 [2020-10-27 20:30:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:27,864 INFO L225 Difference]: With dead ends: 155 [2020-10-27 20:30:27,864 INFO L226 Difference]: Without dead ends: 149 [2020-10-27 20:30:27,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 20:30:27,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-27 20:30:27,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2020-10-27 20:30:27,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 20:30:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 212 transitions. [2020-10-27 20:30:27,874 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 212 transitions. Word has length 142 [2020-10-27 20:30:27,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:27,874 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 212 transitions. [2020-10-27 20:30:27,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 20:30:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 212 transitions. [2020-10-27 20:30:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-27 20:30:27,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:27,876 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:27,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 20:30:27,876 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:27,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:27,876 INFO L82 PathProgramCache]: Analyzing trace with hash 742337301, now seen corresponding path program 32 times [2020-10-27 20:30:27,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:27,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499267276] [2020-10-27 20:30:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:27,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:27,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:27,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:28,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:29,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:29,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-27 20:30:29,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:30:29,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-27 20:30:29,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:29,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 20:30:29,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:30:29,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-27 20:30:29,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:29,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:29,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:29,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:29,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:29,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:29,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:29,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:29,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:29,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:29,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:29,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2212 backedges. 162 proven. 2048 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:30:29,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499267276] [2020-10-27 20:30:29,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:29,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 20:30:29,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722469781] [2020-10-27 20:30:29,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 20:30:29,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:29,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 20:30:29,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 20:30:29,880 INFO L87 Difference]: Start difference. First operand 147 states and 212 transitions. Second operand 36 states. [2020-10-27 20:30:32,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:32,560 INFO L93 Difference]: Finished difference Result 159 states and 228 transitions. [2020-10-27 20:30:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 20:30:32,561 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-10-27 20:30:32,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:32,563 INFO L225 Difference]: With dead ends: 159 [2020-10-27 20:30:32,563 INFO L226 Difference]: Without dead ends: 153 [2020-10-27 20:30:32,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 20:30:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-27 20:30:32,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2020-10-27 20:30:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 20:30:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 218 transitions. [2020-10-27 20:30:32,572 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 218 transitions. Word has length 146 [2020-10-27 20:30:32,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:32,573 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 218 transitions. [2020-10-27 20:30:32,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 20:30:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 218 transitions. [2020-10-27 20:30:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-27 20:30:32,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:32,574 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:32,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 20:30:32,574 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:32,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:32,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1209557148, now seen corresponding path program 33 times [2020-10-27 20:30:32,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:32,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633968858] [2020-10-27 20:30:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:32,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:32,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:32,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:32,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:33,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:33,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-27 20:30:33,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:30:33,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1285 [2020-10-27 20:30:33,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:33,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 20:30:33,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:30:33,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-27 20:30:33,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:34,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:34,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:34,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:34,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:34,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:34,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:34,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:34,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:34,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:34,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:34,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2347 backedges. 167 proven. 2178 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:30:34,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633968858] [2020-10-27 20:30:34,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:34,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 20:30:34,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141783631] [2020-10-27 20:30:34,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 20:30:34,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:34,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 20:30:34,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 20:30:34,816 INFO L87 Difference]: Start difference. First operand 151 states and 218 transitions. Second operand 37 states. [2020-10-27 20:30:37,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:37,556 INFO L93 Difference]: Finished difference Result 163 states and 234 transitions. [2020-10-27 20:30:37,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 20:30:37,556 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 150 [2020-10-27 20:30:37,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:37,558 INFO L225 Difference]: With dead ends: 163 [2020-10-27 20:30:37,558 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 20:30:37,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 20:30:37,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 20:30:37,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2020-10-27 20:30:37,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 20:30:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 224 transitions. [2020-10-27 20:30:37,567 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 224 transitions. Word has length 150 [2020-10-27 20:30:37,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:37,568 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 224 transitions. [2020-10-27 20:30:37,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 20:30:37,568 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 224 transitions. [2020-10-27 20:30:37,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 20:30:37,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:37,568 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:37,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 20:30:37,569 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:37,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:37,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1044546909, now seen corresponding path program 34 times [2020-10-27 20:30:37,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:37,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893961043] [2020-10-27 20:30:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:37,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:37,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:37,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:37,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:38,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:38,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 20:30:38,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:30:38,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1298 [2020-10-27 20:30:38,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:38,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 20:30:38,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:30:38,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-27 20:30:38,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:39,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:39,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:39,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:39,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:39,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:39,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:39,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:39,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:39,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:39,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:39,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2486 backedges. 172 proven. 2312 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:30:39,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893961043] [2020-10-27 20:30:39,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:39,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 20:30:39,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751884997] [2020-10-27 20:30:39,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 20:30:39,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:39,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 20:30:39,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 20:30:39,885 INFO L87 Difference]: Start difference. First operand 155 states and 224 transitions. Second operand 38 states. [2020-10-27 20:30:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:42,773 INFO L93 Difference]: Finished difference Result 167 states and 240 transitions. [2020-10-27 20:30:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 20:30:42,774 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 154 [2020-10-27 20:30:42,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:42,776 INFO L225 Difference]: With dead ends: 167 [2020-10-27 20:30:42,776 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 20:30:42,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 20:30:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 20:30:42,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2020-10-27 20:30:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-27 20:30:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 230 transitions. [2020-10-27 20:30:42,785 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 230 transitions. Word has length 154 [2020-10-27 20:30:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:42,786 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 230 transitions. [2020-10-27 20:30:42,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 20:30:42,786 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 230 transitions. [2020-10-27 20:30:42,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 20:30:42,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:42,787 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:42,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 20:30:42,787 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:42,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:42,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1336424746, now seen corresponding path program 35 times [2020-10-27 20:30:42,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:42,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064970016] [2020-10-27 20:30:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:42,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:42,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:42,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:42,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:44,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:44,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-27 20:30:44,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:30:44,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1419 [2020-10-27 20:30:44,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:44,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 20:30:44,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:30:44,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-27 20:30:44,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:45,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:45,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:45,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:45,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:45,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:45,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:45,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:45,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:45,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:45,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:45,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2629 backedges. 177 proven. 2450 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:30:45,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064970016] [2020-10-27 20:30:45,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:45,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 20:30:45,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100671396] [2020-10-27 20:30:45,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 20:30:45,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:45,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 20:30:45,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 20:30:45,273 INFO L87 Difference]: Start difference. First operand 159 states and 230 transitions. Second operand 39 states. [2020-10-27 20:30:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:48,348 INFO L93 Difference]: Finished difference Result 171 states and 246 transitions. [2020-10-27 20:30:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 20:30:48,349 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 158 [2020-10-27 20:30:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:48,351 INFO L225 Difference]: With dead ends: 171 [2020-10-27 20:30:48,351 INFO L226 Difference]: Without dead ends: 165 [2020-10-27 20:30:48,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 20:30:48,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-27 20:30:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2020-10-27 20:30:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 20:30:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 236 transitions. [2020-10-27 20:30:48,361 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 236 transitions. Word has length 158 [2020-10-27 20:30:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:48,361 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 236 transitions. [2020-10-27 20:30:48,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 20:30:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 236 transitions. [2020-10-27 20:30:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 20:30:48,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:48,363 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:48,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 20:30:48,363 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:48,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:48,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1433558065, now seen corresponding path program 36 times [2020-10-27 20:30:48,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:48,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621122984] [2020-10-27 20:30:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:48,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:48,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:48,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:48,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:49,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:49,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-27 20:30:49,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:30:49,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1457 [2020-10-27 20:30:49,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:49,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 20:30:49,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:30:49,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-27 20:30:49,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:50,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:50,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:50,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:50,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:50,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:50,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:30:50,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:50,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2776 backedges. 182 proven. 2592 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:30:51,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621122984] [2020-10-27 20:30:51,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:51,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 20:30:51,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681045058] [2020-10-27 20:30:51,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 20:30:51,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:51,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 20:30:51,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 20:30:51,009 INFO L87 Difference]: Start difference. First operand 163 states and 236 transitions. Second operand 40 states. [2020-10-27 20:30:54,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:30:54,087 INFO L93 Difference]: Finished difference Result 175 states and 252 transitions. [2020-10-27 20:30:54,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 20:30:54,088 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 162 [2020-10-27 20:30:54,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:30:54,089 INFO L225 Difference]: With dead ends: 175 [2020-10-27 20:30:54,089 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 20:30:54,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 20:30:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 20:30:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2020-10-27 20:30:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 20:30:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 242 transitions. [2020-10-27 20:30:54,099 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 242 transitions. Word has length 162 [2020-10-27 20:30:54,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:30:54,099 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 242 transitions. [2020-10-27 20:30:54,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 20:30:54,099 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 242 transitions. [2020-10-27 20:30:54,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-27 20:30:54,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:30:54,100 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:30:54,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 20:30:54,101 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:30:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:30:54,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1406510008, now seen corresponding path program 37 times [2020-10-27 20:30:54,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:30:54,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408465925] [2020-10-27 20:30:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:30:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:54,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:54,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:54,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:54,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:55,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:55,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-27 20:30:55,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:30:55,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1515 [2020-10-27 20:30:55,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:55,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 20:30:55,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:30:55,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-27 20:30:55,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:56,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:30:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:30:56,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:30:56,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:30:56,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:30:56,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:30:56,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:30:56,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:30:56,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:30:56,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:30:56,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:30:56,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:30:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2927 backedges. 187 proven. 2738 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:30:56,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408465925] [2020-10-27 20:30:56,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:30:56,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 20:30:56,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638045242] [2020-10-27 20:30:56,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 20:30:56,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:30:56,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 20:30:56,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 20:30:56,804 INFO L87 Difference]: Start difference. First operand 167 states and 242 transitions. Second operand 41 states. [2020-10-27 20:31:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:00,057 INFO L93 Difference]: Finished difference Result 179 states and 258 transitions. [2020-10-27 20:31:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 20:31:00,058 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 166 [2020-10-27 20:31:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:00,060 INFO L225 Difference]: With dead ends: 179 [2020-10-27 20:31:00,060 INFO L226 Difference]: Without dead ends: 173 [2020-10-27 20:31:00,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 20:31:00,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-27 20:31:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2020-10-27 20:31:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-27 20:31:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 248 transitions. [2020-10-27 20:31:00,069 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 248 transitions. Word has length 166 [2020-10-27 20:31:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:00,069 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 248 transitions. [2020-10-27 20:31:00,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 20:31:00,069 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 248 transitions. [2020-10-27 20:31:00,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-27 20:31:00,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:00,071 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:00,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 20:31:00,071 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:00,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:00,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1487654847, now seen corresponding path program 38 times [2020-10-27 20:31:00,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:00,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120053492] [2020-10-27 20:31:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:00,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:00,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:00,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:00,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:01,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:01,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-27 20:31:01,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:31:01,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1794 [2020-10-27 20:31:01,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:01,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 20:31:01,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:31:01,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-27 20:31:01,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:03,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:03,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:03,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:03,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:03,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:03,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:03,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:03,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:03,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:03,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:03,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3082 backedges. 192 proven. 2888 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:31:03,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120053492] [2020-10-27 20:31:03,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:03,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 20:31:03,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841967182] [2020-10-27 20:31:03,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 20:31:03,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:03,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 20:31:03,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 20:31:03,163 INFO L87 Difference]: Start difference. First operand 171 states and 248 transitions. Second operand 42 states. [2020-10-27 20:31:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:06,593 INFO L93 Difference]: Finished difference Result 183 states and 264 transitions. [2020-10-27 20:31:06,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 20:31:06,594 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 170 [2020-10-27 20:31:06,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:06,596 INFO L225 Difference]: With dead ends: 183 [2020-10-27 20:31:06,596 INFO L226 Difference]: Without dead ends: 177 [2020-10-27 20:31:06,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 20:31:06,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-27 20:31:06,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2020-10-27 20:31:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 20:31:06,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 254 transitions. [2020-10-27 20:31:06,606 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 254 transitions. Word has length 170 [2020-10-27 20:31:06,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:06,606 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 254 transitions. [2020-10-27 20:31:06,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 20:31:06,607 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 254 transitions. [2020-10-27 20:31:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-27 20:31:06,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:06,608 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:06,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 20:31:06,608 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:06,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:06,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1861132358, now seen corresponding path program 39 times [2020-10-27 20:31:06,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:06,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881561725] [2020-10-27 20:31:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:06,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:06,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:06,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:06,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:08,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:08,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-27 20:31:08,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:31:08,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2001 [2020-10-27 20:31:08,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:08,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 20:31:08,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:31:08,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-27 20:31:08,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:09,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:09,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:09,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:09,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:09,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:09,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:09,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:09,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:09,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:09,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:09,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3241 backedges. 197 proven. 3042 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:31:09,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881561725] [2020-10-27 20:31:09,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:09,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 20:31:09,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438975487] [2020-10-27 20:31:09,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 20:31:09,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:09,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 20:31:09,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 20:31:09,868 INFO L87 Difference]: Start difference. First operand 175 states and 254 transitions. Second operand 43 states. [2020-10-27 20:31:13,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:13,232 INFO L93 Difference]: Finished difference Result 187 states and 270 transitions. [2020-10-27 20:31:13,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 20:31:13,233 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 174 [2020-10-27 20:31:13,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:13,236 INFO L225 Difference]: With dead ends: 187 [2020-10-27 20:31:13,236 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 20:31:13,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 20:31:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 20:31:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2020-10-27 20:31:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-27 20:31:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 260 transitions. [2020-10-27 20:31:13,245 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 260 transitions. Word has length 174 [2020-10-27 20:31:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:13,246 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 260 transitions. [2020-10-27 20:31:13,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 20:31:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 260 transitions. [2020-10-27 20:31:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-27 20:31:13,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:13,247 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:13,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 20:31:13,248 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:13,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:13,248 INFO L82 PathProgramCache]: Analyzing trace with hash 246928717, now seen corresponding path program 40 times [2020-10-27 20:31:13,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:13,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316805598] [2020-10-27 20:31:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:13,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:13,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:13,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:13,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:15,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:15,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-27 20:31:15,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:31:15,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2002 [2020-10-27 20:31:15,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:15,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 20:31:15,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:31:15,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-27 20:31:15,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:16,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:16,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:16,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:16,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:16,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:16,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:16,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:16,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:16,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:16,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:16,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 202 proven. 3200 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:31:16,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316805598] [2020-10-27 20:31:16,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:16,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 20:31:16,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613873224] [2020-10-27 20:31:16,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 20:31:16,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:16,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 20:31:16,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 20:31:16,658 INFO L87 Difference]: Start difference. First operand 179 states and 260 transitions. Second operand 44 states. [2020-10-27 20:31:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:20,245 INFO L93 Difference]: Finished difference Result 191 states and 276 transitions. [2020-10-27 20:31:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 20:31:20,246 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 178 [2020-10-27 20:31:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:20,247 INFO L225 Difference]: With dead ends: 191 [2020-10-27 20:31:20,247 INFO L226 Difference]: Without dead ends: 185 [2020-10-27 20:31:20,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 20:31:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-27 20:31:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2020-10-27 20:31:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-27 20:31:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 266 transitions. [2020-10-27 20:31:20,255 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 266 transitions. Word has length 178 [2020-10-27 20:31:20,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:20,255 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 266 transitions. [2020-10-27 20:31:20,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 20:31:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 266 transitions. [2020-10-27 20:31:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-27 20:31:20,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:20,256 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:20,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 20:31:20,257 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:20,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1925108012, now seen corresponding path program 41 times [2020-10-27 20:31:20,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:20,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740597634] [2020-10-27 20:31:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:20,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:20,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:20,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:20,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:21,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:21,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-27 20:31:21,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:31:21,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1657 [2020-10-27 20:31:21,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:21,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 20:31:21,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:31:21,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-27 20:31:21,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:23,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:23,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:23,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:23,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:23,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:23,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:23,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:23,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:23,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:23,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:23,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3571 backedges. 207 proven. 3362 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:31:23,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740597634] [2020-10-27 20:31:23,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:23,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 20:31:23,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187033579] [2020-10-27 20:31:23,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 20:31:23,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:23,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 20:31:23,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 20:31:23,391 INFO L87 Difference]: Start difference. First operand 183 states and 266 transitions. Second operand 45 states. [2020-10-27 20:31:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:27,136 INFO L93 Difference]: Finished difference Result 195 states and 282 transitions. [2020-10-27 20:31:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 20:31:27,137 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 182 [2020-10-27 20:31:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:27,138 INFO L225 Difference]: With dead ends: 195 [2020-10-27 20:31:27,138 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 20:31:27,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 20:31:27,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 20:31:27,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2020-10-27 20:31:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-27 20:31:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 272 transitions. [2020-10-27 20:31:27,148 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 272 transitions. Word has length 182 [2020-10-27 20:31:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:27,148 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 272 transitions. [2020-10-27 20:31:27,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 20:31:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 272 transitions. [2020-10-27 20:31:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-27 20:31:27,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:27,150 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:27,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 20:31:27,150 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:27,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:27,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1931186981, now seen corresponding path program 42 times [2020-10-27 20:31:27,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:27,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376585164] [2020-10-27 20:31:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:27,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:27,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:27,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:27,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:28,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:28,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-27 20:31:28,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:31:28,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1392 [2020-10-27 20:31:28,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:28,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 20:31:28,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:31:28,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-27 20:31:28,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:30,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:30,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:30,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:30,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:30,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:30,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:30,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:30,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:30,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:30,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:30,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3742 backedges. 212 proven. 3528 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:31:30,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376585164] [2020-10-27 20:31:30,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:30,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 20:31:30,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280482699] [2020-10-27 20:31:30,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 20:31:30,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:30,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 20:31:30,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 20:31:30,099 INFO L87 Difference]: Start difference. First operand 187 states and 272 transitions. Second operand 46 states. [2020-10-27 20:31:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:33,948 INFO L93 Difference]: Finished difference Result 199 states and 288 transitions. [2020-10-27 20:31:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 20:31:33,948 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 186 [2020-10-27 20:31:33,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:33,950 INFO L225 Difference]: With dead ends: 199 [2020-10-27 20:31:33,950 INFO L226 Difference]: Without dead ends: 193 [2020-10-27 20:31:33,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 20:31:33,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-27 20:31:33,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2020-10-27 20:31:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 20:31:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 278 transitions. [2020-10-27 20:31:33,960 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 278 transitions. Word has length 186 [2020-10-27 20:31:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:33,961 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 278 transitions. [2020-10-27 20:31:33,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 20:31:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 278 transitions. [2020-10-27 20:31:33,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-27 20:31:33,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:33,962 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:33,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 20:31:33,962 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:33,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:33,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1830506338, now seen corresponding path program 43 times [2020-10-27 20:31:33,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:33,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703528907] [2020-10-27 20:31:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:33,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:33,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:34,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:34,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:36,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:36,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-27 20:31:36,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:31:36,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2286 [2020-10-27 20:31:36,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 20:31:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:31:36,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-27 20:31:36,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:37,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:37,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:37,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:37,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:37,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:37,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:37,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:37,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:37,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:37,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:37,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3917 backedges. 217 proven. 3698 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:31:37,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703528907] [2020-10-27 20:31:37,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:37,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 20:31:37,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153599052] [2020-10-27 20:31:37,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 20:31:37,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:37,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 20:31:37,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 20:31:37,817 INFO L87 Difference]: Start difference. First operand 191 states and 278 transitions. Second operand 47 states. [2020-10-27 20:31:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:41,889 INFO L93 Difference]: Finished difference Result 203 states and 294 transitions. [2020-10-27 20:31:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 20:31:41,890 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 190 [2020-10-27 20:31:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:41,892 INFO L225 Difference]: With dead ends: 203 [2020-10-27 20:31:41,892 INFO L226 Difference]: Without dead ends: 197 [2020-10-27 20:31:41,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 20:31:41,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-27 20:31:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2020-10-27 20:31:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 20:31:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 284 transitions. [2020-10-27 20:31:41,902 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 284 transitions. Word has length 190 [2020-10-27 20:31:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:41,902 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 284 transitions. [2020-10-27 20:31:41,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 20:31:41,903 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 284 transitions. [2020-10-27 20:31:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-27 20:31:41,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:41,904 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:41,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 20:31:41,904 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:41,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:41,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1166043543, now seen corresponding path program 44 times [2020-10-27 20:31:41,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:41,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744259061] [2020-10-27 20:31:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:41,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:41,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:42,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:44,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:44,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-27 20:31:44,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:31:44,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2284 [2020-10-27 20:31:44,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:44,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 20:31:44,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:31:44,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-27 20:31:44,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:45,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:45,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:45,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:45,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:45,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:45,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:45,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:45,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 222 proven. 3872 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:31:45,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744259061] [2020-10-27 20:31:45,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:45,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 20:31:45,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941116547] [2020-10-27 20:31:45,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 20:31:45,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 20:31:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 20:31:45,797 INFO L87 Difference]: Start difference. First operand 195 states and 284 transitions. Second operand 48 states. [2020-10-27 20:31:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:49,997 INFO L93 Difference]: Finished difference Result 207 states and 300 transitions. [2020-10-27 20:31:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 20:31:49,999 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 194 [2020-10-27 20:31:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:50,001 INFO L225 Difference]: With dead ends: 207 [2020-10-27 20:31:50,002 INFO L226 Difference]: Without dead ends: 201 [2020-10-27 20:31:50,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 20:31:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-27 20:31:50,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2020-10-27 20:31:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-27 20:31:50,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 290 transitions. [2020-10-27 20:31:50,012 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 290 transitions. Word has length 194 [2020-10-27 20:31:50,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:50,012 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 290 transitions. [2020-10-27 20:31:50,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 20:31:50,012 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 290 transitions. [2020-10-27 20:31:50,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-27 20:31:50,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:50,014 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:50,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 20:31:50,014 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:50,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:50,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1630862864, now seen corresponding path program 45 times [2020-10-27 20:31:50,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:50,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719083850] [2020-10-27 20:31:50,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:50,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:50,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:50,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:50,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:51,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:51,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-27 20:31:51,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:31:51,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1976 [2020-10-27 20:31:51,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:51,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 20:31:51,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:31:51,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 183 [2020-10-27 20:31:51,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:53,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:31:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:53,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:53,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:31:53,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:31:53,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:31:53,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:31:53,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:31:53,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:31:53,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:31:53,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:31:53,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:31:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4279 backedges. 227 proven. 4050 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:31:53,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719083850] [2020-10-27 20:31:53,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:31:53,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 20:31:53,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761938085] [2020-10-27 20:31:53,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 20:31:53,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:31:53,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 20:31:53,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 20:31:53,693 INFO L87 Difference]: Start difference. First operand 199 states and 290 transitions. Second operand 49 states. [2020-10-27 20:31:58,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:58,092 INFO L93 Difference]: Finished difference Result 211 states and 306 transitions. [2020-10-27 20:31:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 20:31:58,093 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 198 [2020-10-27 20:31:58,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:58,095 INFO L225 Difference]: With dead ends: 211 [2020-10-27 20:31:58,095 INFO L226 Difference]: Without dead ends: 205 [2020-10-27 20:31:58,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 20:31:58,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-27 20:31:58,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2020-10-27 20:31:58,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-27 20:31:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 296 transitions. [2020-10-27 20:31:58,106 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 296 transitions. Word has length 198 [2020-10-27 20:31:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:58,106 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 296 transitions. [2020-10-27 20:31:58,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 20:31:58,106 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 296 transitions. [2020-10-27 20:31:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-27 20:31:58,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:58,108 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:58,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 20:31:58,108 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:58,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1356288503, now seen corresponding path program 46 times [2020-10-27 20:31:58,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:58,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021965244] [2020-10-27 20:31:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:58,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:58,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:58,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:58,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:00,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:00,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-27 20:32:00,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:32:00,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2148 [2020-10-27 20:32:00,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 20:32:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:32:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 187 [2020-10-27 20:32:00,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:01,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:01,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:01,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:01,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:01,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:01,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:32:01,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:01,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:01,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:01,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:01,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4466 backedges. 232 proven. 4232 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:32:02,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021965244] [2020-10-27 20:32:02,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:02,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 20:32:02,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739298717] [2020-10-27 20:32:02,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 20:32:02,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:02,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 20:32:02,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 20:32:02,026 INFO L87 Difference]: Start difference. First operand 203 states and 296 transitions. Second operand 50 states. [2020-10-27 20:32:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:06,575 INFO L93 Difference]: Finished difference Result 215 states and 312 transitions. [2020-10-27 20:32:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 20:32:06,576 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 202 [2020-10-27 20:32:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:06,578 INFO L225 Difference]: With dead ends: 215 [2020-10-27 20:32:06,578 INFO L226 Difference]: Without dead ends: 209 [2020-10-27 20:32:06,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 20:32:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-27 20:32:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-27 20:32:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 20:32:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 302 transitions. [2020-10-27 20:32:06,598 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 302 transitions. Word has length 202 [2020-10-27 20:32:06,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:06,598 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 302 transitions. [2020-10-27 20:32:06,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 20:32:06,598 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 302 transitions. [2020-10-27 20:32:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-27 20:32:06,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:06,600 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:06,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 20:32:06,600 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:06,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:06,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2070002050, now seen corresponding path program 47 times [2020-10-27 20:32:06,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:06,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195687191] [2020-10-27 20:32:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:06,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:06,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:06,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:07,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:09,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:09,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-27 20:32:09,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:32:09,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2774 [2020-10-27 20:32:09,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:09,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 20:32:09,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:32:09,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-10-27 20:32:09,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:11,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:11,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:11,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:11,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:11,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:11,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:32:11,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:11,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:11,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:11,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:11,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4657 backedges. 237 proven. 4418 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:32:11,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195687191] [2020-10-27 20:32:11,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:11,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 20:32:11,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564593670] [2020-10-27 20:32:11,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 20:32:11,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:11,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 20:32:11,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 20:32:11,248 INFO L87 Difference]: Start difference. First operand 207 states and 302 transitions. Second operand 51 states. [2020-10-27 20:32:16,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:16,050 INFO L93 Difference]: Finished difference Result 219 states and 318 transitions. [2020-10-27 20:32:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 20:32:16,051 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 206 [2020-10-27 20:32:16,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:16,054 INFO L225 Difference]: With dead ends: 219 [2020-10-27 20:32:16,054 INFO L226 Difference]: Without dead ends: 213 [2020-10-27 20:32:16,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 20:32:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-27 20:32:16,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2020-10-27 20:32:16,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-27 20:32:16,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 308 transitions. [2020-10-27 20:32:16,063 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 308 transitions. Word has length 206 [2020-10-27 20:32:16,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:16,063 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 308 transitions. [2020-10-27 20:32:16,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 20:32:16,064 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 308 transitions. [2020-10-27 20:32:16,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-27 20:32:16,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:16,065 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:16,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 20:32:16,065 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:16,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:16,066 INFO L82 PathProgramCache]: Analyzing trace with hash -616980603, now seen corresponding path program 48 times [2020-10-27 20:32:16,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:16,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811158361] [2020-10-27 20:32:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:16,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:16,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:18,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:18,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-27 20:32:18,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:32:18,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2857 [2020-10-27 20:32:18,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 20:32:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:32:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 195 [2020-10-27 20:32:18,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:20,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:20,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:20,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:20,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:20,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:20,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:32:20,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:20,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:20,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:20,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:20,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4852 backedges. 242 proven. 4608 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:32:20,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811158361] [2020-10-27 20:32:20,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:20,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 20:32:20,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226060013] [2020-10-27 20:32:20,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 20:32:20,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:20,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 20:32:20,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 20:32:20,852 INFO L87 Difference]: Start difference. First operand 211 states and 308 transitions. Second operand 52 states. [2020-10-27 20:32:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:25,793 INFO L93 Difference]: Finished difference Result 223 states and 324 transitions. [2020-10-27 20:32:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 20:32:25,794 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 210 [2020-10-27 20:32:25,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:25,796 INFO L225 Difference]: With dead ends: 223 [2020-10-27 20:32:25,796 INFO L226 Difference]: Without dead ends: 217 [2020-10-27 20:32:25,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 20:32:25,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-27 20:32:25,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2020-10-27 20:32:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-27 20:32:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 314 transitions. [2020-10-27 20:32:25,806 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 314 transitions. Word has length 210 [2020-10-27 20:32:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:25,806 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 314 transitions. [2020-10-27 20:32:25,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 20:32:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 314 transitions. [2020-10-27 20:32:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-27 20:32:25,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:25,808 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:25,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 20:32:25,808 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:25,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:25,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1390615820, now seen corresponding path program 49 times [2020-10-27 20:32:25,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:25,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552693438] [2020-10-27 20:32:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:25,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:25,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:25,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:26,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:28,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:28,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-27 20:32:28,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:32:28,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2297 [2020-10-27 20:32:28,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:28,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 20:32:28,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:32:28,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 199 [2020-10-27 20:32:28,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:30,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:30,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:30,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:30,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:30,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:30,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:32:30,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:30,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:30,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:30,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:30,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 247 proven. 4802 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:32:30,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552693438] [2020-10-27 20:32:30,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:30,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 20:32:30,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047161131] [2020-10-27 20:32:30,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 20:32:30,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:30,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 20:32:30,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 20:32:30,109 INFO L87 Difference]: Start difference. First operand 215 states and 314 transitions. Second operand 53 states. [2020-10-27 20:32:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:35,248 INFO L93 Difference]: Finished difference Result 227 states and 330 transitions. [2020-10-27 20:32:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 20:32:35,248 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 214 [2020-10-27 20:32:35,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:35,250 INFO L225 Difference]: With dead ends: 227 [2020-10-27 20:32:35,250 INFO L226 Difference]: Without dead ends: 221 [2020-10-27 20:32:35,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 20:32:35,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-27 20:32:35,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2020-10-27 20:32:35,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-27 20:32:35,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 320 transitions. [2020-10-27 20:32:35,261 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 320 transitions. Word has length 214 [2020-10-27 20:32:35,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:35,261 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 320 transitions. [2020-10-27 20:32:35,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 20:32:35,261 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 320 transitions. [2020-10-27 20:32:35,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-27 20:32:35,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:35,263 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:35,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 20:32:35,263 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:35,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:35,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1225490669, now seen corresponding path program 50 times [2020-10-27 20:32:35,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:35,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283254606] [2020-10-27 20:32:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:35,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:35,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:35,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:35,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:38,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:38,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-27 20:32:38,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:32:38,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3114 [2020-10-27 20:32:38,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:38,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 20:32:38,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:32:38,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 203 [2020-10-27 20:32:38,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:40,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:40,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:40,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:40,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:40,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:40,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:32:40,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:40,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:40,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:40,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:40,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5254 backedges. 252 proven. 5000 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:32:40,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283254606] [2020-10-27 20:32:40,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:40,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 20:32:40,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417056516] [2020-10-27 20:32:40,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 20:32:40,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:40,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 20:32:40,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 20:32:40,460 INFO L87 Difference]: Start difference. First operand 219 states and 320 transitions. Second operand 54 states. [2020-10-27 20:32:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:45,795 INFO L93 Difference]: Finished difference Result 231 states and 336 transitions. [2020-10-27 20:32:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 20:32:45,796 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 218 [2020-10-27 20:32:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:45,798 INFO L225 Difference]: With dead ends: 231 [2020-10-27 20:32:45,798 INFO L226 Difference]: Without dead ends: 225 [2020-10-27 20:32:45,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-27 20:32:45,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-27 20:32:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2020-10-27 20:32:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-27 20:32:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 326 transitions. [2020-10-27 20:32:45,809 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 326 transitions. Word has length 218 [2020-10-27 20:32:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:45,809 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 326 transitions. [2020-10-27 20:32:45,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 20:32:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 326 transitions. [2020-10-27 20:32:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-27 20:32:45,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:45,811 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:45,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 20:32:45,811 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:45,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:45,811 INFO L82 PathProgramCache]: Analyzing trace with hash 266831258, now seen corresponding path program 51 times [2020-10-27 20:32:45,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:45,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83394414] [2020-10-27 20:32:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:45,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:45,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:45,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:46,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:48,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:48,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-27 20:32:48,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:32:48,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2629 [2020-10-27 20:32:48,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:48,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 20:32:48,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:32:48,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-27 20:32:48,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:50,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:32:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:50,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:50,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:50,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:32:50,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:32:50,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:32:50,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:32:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:32:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:32:50,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:32:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5461 backedges. 257 proven. 5202 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:32:50,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83394414] [2020-10-27 20:32:50,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:32:50,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 20:32:50,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867844110] [2020-10-27 20:32:50,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 20:32:50,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:32:50,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 20:32:50,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 20:32:50,626 INFO L87 Difference]: Start difference. First operand 223 states and 326 transitions. Second operand 55 states. [2020-10-27 20:32:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:32:56,136 INFO L93 Difference]: Finished difference Result 235 states and 342 transitions. [2020-10-27 20:32:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 20:32:56,141 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 222 [2020-10-27 20:32:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:32:56,142 INFO L225 Difference]: With dead ends: 235 [2020-10-27 20:32:56,142 INFO L226 Difference]: Without dead ends: 229 [2020-10-27 20:32:56,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-27 20:32:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-27 20:32:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2020-10-27 20:32:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-27 20:32:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 332 transitions. [2020-10-27 20:32:56,152 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 332 transitions. Word has length 222 [2020-10-27 20:32:56,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:32:56,152 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 332 transitions. [2020-10-27 20:32:56,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 20:32:56,152 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 332 transitions. [2020-10-27 20:32:56,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-27 20:32:56,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:32:56,154 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:32:56,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 20:32:56,154 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:32:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:32:56,155 INFO L82 PathProgramCache]: Analyzing trace with hash 324399265, now seen corresponding path program 52 times [2020-10-27 20:32:56,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:32:56,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933786588] [2020-10-27 20:32:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:32:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:32:56,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:56,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:56,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:56,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:32:58,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:32:58,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-27 20:32:58,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:32:58,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2788 [2020-10-27 20:32:58,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:32:58,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 20:32:58,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:32:58,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 211 [2020-10-27 20:32:58,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:01,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:33:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:33:01,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:33:01,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:33:01,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:33:01,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:33:01,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 20:33:01,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:33:01,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:33:01,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:33:01,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:33:01,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:33:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5672 backedges. 262 proven. 5408 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:33:01,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933786588] [2020-10-27 20:33:01,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:33:01,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 20:33:01,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981304641] [2020-10-27 20:33:01,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 20:33:01,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:33:01,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 20:33:01,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 20:33:01,202 INFO L87 Difference]: Start difference. First operand 227 states and 332 transitions. Second operand 56 states.