/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/Mono1_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:50:03,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:50:03,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:50:03,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:50:03,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:50:03,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:50:03,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:50:04,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:50:04,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:50:04,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:50:04,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:50:04,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:50:04,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:50:04,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:50:04,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:50:04,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:50:04,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:50:04,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:50:04,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:50:04,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:50:04,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:50:04,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:50:04,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:50:04,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:50:04,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:50:04,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:50:04,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:50:04,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:50:04,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:50:04,065 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:50:04,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:50:04,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:50:04,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:50:04,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:50:04,069 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:50:04,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:50:04,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:50:04,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:50:04,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:50:04,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:50:04,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:50:04,074 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 [2020-10-29 09:50:04,109 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:50:04,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:50:04,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:50:04,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:50:04,112 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:50:04,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:50:04,112 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:50:04,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:50:04,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:50:04,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:50:04,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:50:04,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:50:04,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:50:04,114 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:50:04,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:50:04,114 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:50:04,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:50:04,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:50:04,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:50:04,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:50:04,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:50:04,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:50:04,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:50:04,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:50:04,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:50:04,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:50:04,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:50:04,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:50:04,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:50:04,118 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:50:04,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:50:04,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:50:04,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:50:04,524 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:50:04,525 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:50:04,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2020-10-29 09:50:04,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3d3bc6188/71957dfd84e643209f3567f2ba1bd115/FLAG776af5ed6 [2020-10-29 09:50:05,245 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:50:05,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2020-10-29 09:50:05,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3d3bc6188/71957dfd84e643209f3567f2ba1bd115/FLAG776af5ed6 [2020-10-29 09:50:05,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3d3bc6188/71957dfd84e643209f3567f2ba1bd115 [2020-10-29 09:50:05,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:50:05,617 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:50:05,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:50:05,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:50:05,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:50:05,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:50:05" (1/1) ... [2020-10-29 09:50:05,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c361cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:05, skipping insertion in model container [2020-10-29 09:50:05,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:50:05" (1/1) ... [2020-10-29 09:50:05,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:50:05,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:50:05,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:50:05,830 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:50:05,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:50:05,863 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:50:05,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:05 WrapperNode [2020-10-29 09:50:05,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:50:05,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:50:05,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:50:05,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:50:05,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:05" (1/1) ... [2020-10-29 09:50:05,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:05" (1/1) ... [2020-10-29 09:50:05,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:05" (1/1) ... [2020-10-29 09:50:05,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:05" (1/1) ... [2020-10-29 09:50:05,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:05" (1/1) ... [2020-10-29 09:50:05,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:05" (1/1) ... [2020-10-29 09:50:05,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:05" (1/1) ... [2020-10-29 09:50:05,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:50:05,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:50:05,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:50:05,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:50:05,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:05" (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 [2020-10-29 09:50:05,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:50:05,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:50:05,980 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:50:05,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:50:05,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:50:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:50:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:50:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:50:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:50:05,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:50:05,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:50:05,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:50:05,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:50:05,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:50:05,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:50:05,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:50:05,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:50:06,210 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:50:06,210 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:50:06,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:50:06 BoogieIcfgContainer [2020-10-29 09:50:06,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:50:06,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:50:06,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:50:06,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:50:06,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:50:05" (1/3) ... [2020-10-29 09:50:06,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4237162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:50:06, skipping insertion in model container [2020-10-29 09:50:06,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:50:05" (2/3) ... [2020-10-29 09:50:06,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4237162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:50:06, skipping insertion in model container [2020-10-29 09:50:06,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:50:06" (3/3) ... [2020-10-29 09:50:06,221 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-1.c [2020-10-29 09:50:06,234 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:50:06,240 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:50:06,254 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:50:06,311 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:50:06,311 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:50:06,311 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:50:06,311 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:50:06,312 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:50:06,312 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:50:06,316 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:50:06,316 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:50:06,358 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-29 09:50:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:50:06,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:06,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:06,370 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:06,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:06,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1347720711, now seen corresponding path program 1 times [2020-10-29 09:50:06,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:06,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511058340] [2020-10-29 09:50:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:06,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:06,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:06,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:50:06,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:06,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-29 09:50:06,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:06,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:06,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:06,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:50:06,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:06,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:50:06,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:06,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:06,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:06,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:06,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:06,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 09:50:06,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:06,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:06,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:06,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511058340] [2020-10-29 09:50:06,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:50:06,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 09:50:06,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965698600] [2020-10-29 09:50:06,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 09:50:06,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:06,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 09:50:06,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:50:06,986 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-29 09:50:07,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:07,064 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-29 09:50:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:50:07,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-29 09:50:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:07,076 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:50:07,076 INFO L226 Difference]: Without dead ends: 14 [2020-10-29 09:50:07,082 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 [2020-10-29 09:50:07,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-29 09:50:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-29 09:50:07,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-29 09:50:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-29 09:50:07,146 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-29 09:50:07,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:07,147 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-29 09:50:07,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 09:50:07,147 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-29 09:50:07,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:50:07,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:07,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:07,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:50:07,151 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:07,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1061429201, now seen corresponding path program 1 times [2020-10-29 09:50:07,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:07,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895758588] [2020-10-29 09:50:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:07,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:07,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:07,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:50:07,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:07,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-29 09:50:07,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:07,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:07,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:50:07,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:07,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:50:07,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:07,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:07,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:07,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:07,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:07,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:07,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:50:07,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:07,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:07,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:07,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:07,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:07,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:07,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895758588] [2020-10-29 09:50:07,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:50:07,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:50:07,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159601072] [2020-10-29 09:50:07,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:50:07,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:07,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:50:07,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:50:07,439 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-29 09:50:07,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:07,534 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-29 09:50:07,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:50:07,535 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-29 09:50:07,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:07,536 INFO L225 Difference]: With dead ends: 24 [2020-10-29 09:50:07,536 INFO L226 Difference]: Without dead ends: 16 [2020-10-29 09:50:07,537 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 [2020-10-29 09:50:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-29 09:50:07,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-29 09:50:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-29 09:50:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-29 09:50:07,546 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-29 09:50:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:07,547 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-29 09:50:07,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:50:07,547 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-29 09:50:07,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:50:07,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:07,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:07,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:50:07,549 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:07,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:07,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1101414388, now seen corresponding path program 1 times [2020-10-29 09:50:07,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:07,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608792561] [2020-10-29 09:50:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:07,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:07,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:07,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:50:07,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:07,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-29 09:50:07,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:07,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:07,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:50:07,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 09:50:07,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:50:07,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:07,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:07,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:07,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:07,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:07,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:07,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:50:07,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:07,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:07,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:07,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:07,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:07,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:07,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608792561] [2020-10-29 09:50:07,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:50:07,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:50:07,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610517473] [2020-10-29 09:50:07,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:50:07,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:07,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:50:07,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:50:07,820 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-29 09:50:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:07,911 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-29 09:50:07,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:50:07,912 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-29 09:50:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:07,913 INFO L225 Difference]: With dead ends: 24 [2020-10-29 09:50:07,913 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:50:07,914 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 [2020-10-29 09:50:07,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:50:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-29 09:50:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-29 09:50:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-29 09:50:07,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-29 09:50:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:07,923 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-29 09:50:07,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:50:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-29 09:50:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:50:07,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:07,925 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:07,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:50:07,925 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1647486503, now seen corresponding path program 1 times [2020-10-29 09:50:07,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:07,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903807052] [2020-10-29 09:50:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:07,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:08,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:08,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:08,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:50:08,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:08,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-29 09:50:08,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:08,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:08,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:50:08,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:08,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:50:08,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:08,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:08,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:08,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:08,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:08,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:08,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:50:08,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:08,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:08,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:08,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:08,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:08,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:08,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903807052] [2020-10-29 09:50:08,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:08,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:50:08,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051626151] [2020-10-29 09:50:08,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:50:08,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:08,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:50:08,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:50:08,352 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-29 09:50:08,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:08,486 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-29 09:50:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:50:08,487 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-29 09:50:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:08,488 INFO L225 Difference]: With dead ends: 28 [2020-10-29 09:50:08,488 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 09:50:08,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:50:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 09:50:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-29 09:50:08,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:50:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-29 09:50:08,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-29 09:50:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:08,497 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-29 09:50:08,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:50:08,497 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-29 09:50:08,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:50:08,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:08,498 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:08,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:50:08,499 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:08,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1678553212, now seen corresponding path program 2 times [2020-10-29 09:50:08,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:08,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161597309] [2020-10-29 09:50:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:08,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:08,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:08,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:08,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:50:08,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:08,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-29 09:50:08,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:08,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:08,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:50:08,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:08,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:50:08,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:08,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:08,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:08,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:08,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:08,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:08,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:50:08,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:08,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:08,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:08,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:08,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:08,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:08,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161597309] [2020-10-29 09:50:08,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:08,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:50:08,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39736728] [2020-10-29 09:50:08,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:50:08,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:08,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:50:08,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:50:08,851 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-29 09:50:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:09,017 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-29 09:50:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:50:09,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-29 09:50:09,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:09,019 INFO L225 Difference]: With dead ends: 30 [2020-10-29 09:50:09,019 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 09:50:09,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:50:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 09:50:09,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-29 09:50:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 09:50:09,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-29 09:50:09,027 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-29 09:50:09,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:09,027 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-29 09:50:09,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:50:09,027 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-29 09:50:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:50:09,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:09,028 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:09,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:50:09,029 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1747916193, now seen corresponding path program 3 times [2020-10-29 09:50:09,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:09,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642787362] [2020-10-29 09:50:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:09,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:09,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:09,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:09,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:50:09,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:09,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-29 09:50:09,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:09,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:09,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:50:09,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:09,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:50:09,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:09,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:09,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:09,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:09,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:09,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:09,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:50:09,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:09,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:09,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:09,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:09,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:09,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:09,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642787362] [2020-10-29 09:50:09,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:09,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:50:09,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637449532] [2020-10-29 09:50:09,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:50:09,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:09,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:50:09,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:50:09,434 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-29 09:50:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:09,625 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-29 09:50:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:50:09,626 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-29 09:50:09,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:09,627 INFO L225 Difference]: With dead ends: 32 [2020-10-29 09:50:09,627 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 09:50:09,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:50:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 09:50:09,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-29 09:50:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 09:50:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-29 09:50:09,635 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-29 09:50:09,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:09,635 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-29 09:50:09,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:50:09,635 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-29 09:50:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-29 09:50:09,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:09,636 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:09,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:50:09,636 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:09,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:09,637 INFO L82 PathProgramCache]: Analyzing trace with hash -345098366, now seen corresponding path program 4 times [2020-10-29 09:50:09,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:09,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100106274] [2020-10-29 09:50:09,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:09,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:09,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:09,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:09,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-29 09:50:09,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:09,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-29 09:50:09,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:09,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:09,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:50:09,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:09,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:50:09,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:09,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:09,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:09,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:09,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:09,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:09,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:50:09,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:09,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:09,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:09,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:09,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:09,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:09,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100106274] [2020-10-29 09:50:09,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:09,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:50:09,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847261887] [2020-10-29 09:50:09,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:50:09,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:09,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:50:09,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:50:09,955 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 8 states. [2020-10-29 09:50:10,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:10,291 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-29 09:50:10,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:50:10,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-29 09:50:10,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:10,292 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:50:10,292 INFO L226 Difference]: Without dead ends: 25 [2020-10-29 09:50:10,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:50:10,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-29 09:50:10,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-29 09:50:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:50:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-29 09:50:10,308 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-29 09:50:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:10,308 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-29 09:50:10,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:50:10,308 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-29 09:50:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:50:10,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:10,310 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:10,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:50:10,310 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:10,311 INFO L82 PathProgramCache]: Analyzing trace with hash -856897563, now seen corresponding path program 5 times [2020-10-29 09:50:10,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:10,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355082691] [2020-10-29 09:50:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:10,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:10,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:10,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:10,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:50:10,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:10,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-29 09:50:10,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:10,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:10,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:50:10,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:10,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-29 09:50:10,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:10,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:10,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:10,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:10,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:10,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:10,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:50:10,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:10,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:10,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:10,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:10,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:10,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:10,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355082691] [2020-10-29 09:50:10,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:10,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:50:10,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300370368] [2020-10-29 09:50:10,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:50:10,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:10,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:50:10,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:50:10,677 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-10-29 09:50:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:11,032 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-29 09:50:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:50:11,032 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-29 09:50:11,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:11,033 INFO L225 Difference]: With dead ends: 36 [2020-10-29 09:50:11,033 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:50:11,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:50:11,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:50:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-29 09:50:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 09:50:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-29 09:50:11,041 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-29 09:50:11,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:11,041 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-29 09:50:11,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:50:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-29 09:50:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-29 09:50:11,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:11,043 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:11,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:50:11,043 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:11,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:11,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1225313160, now seen corresponding path program 6 times [2020-10-29 09:50:11,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:11,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243367026] [2020-10-29 09:50:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:11,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:11,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:11,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:11,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:50:11,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:11,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-29 09:50:11,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:11,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:11,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:50:11,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:11,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 09:50:11,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:11,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:11,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:11,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:11,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:11,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:11,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:50:11,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:11,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:11,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:11,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:11,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:11,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:11,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243367026] [2020-10-29 09:50:11,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:11,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:50:11,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278051664] [2020-10-29 09:50:11,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:50:11,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:11,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:50:11,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:50:11,450 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-10-29 09:50:11,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:11,900 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-29 09:50:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:50:11,901 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-29 09:50:11,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:11,902 INFO L225 Difference]: With dead ends: 38 [2020-10-29 09:50:11,902 INFO L226 Difference]: Without dead ends: 29 [2020-10-29 09:50:11,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:50:11,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-29 09:50:11,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-29 09:50:11,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:50:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-29 09:50:11,923 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-29 09:50:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:11,924 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-29 09:50:11,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:50:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-29 09:50:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:50:11,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:11,926 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:11,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:50:11,926 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:11,927 INFO L82 PathProgramCache]: Analyzing trace with hash 775058027, now seen corresponding path program 7 times [2020-10-29 09:50:11,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:11,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823078024] [2020-10-29 09:50:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:11,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:12,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:12,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:12,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:50:12,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:12,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-29 09:50:12,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:12,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:12,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:50:12,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:12,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:50:12,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:12,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:12,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:12,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:12,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:12,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:12,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:50:12,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:12,497 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:12,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:12,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:12,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:12,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:12,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823078024] [2020-10-29 09:50:12,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:12,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:50:12,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609000033] [2020-10-29 09:50:12,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:50:12,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:12,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:50:12,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:50:12,507 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-29 09:50:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:13,033 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-29 09:50:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:50:13,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-29 09:50:13,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:13,035 INFO L225 Difference]: With dead ends: 40 [2020-10-29 09:50:13,035 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:50:13,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:50:13,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:50:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-29 09:50:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 09:50:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-29 09:50:13,044 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-29 09:50:13,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:13,044 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-29 09:50:13,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:50:13,044 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-29 09:50:13,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:50:13,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:13,045 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:13,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:50:13,046 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:13,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:13,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1871572110, now seen corresponding path program 8 times [2020-10-29 09:50:13,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:13,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715936388] [2020-10-29 09:50:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:13,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:13,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:13,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:13,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:50:13,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:13,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-29 09:50:13,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:13,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:13,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:50:13,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:13,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 09:50:13,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:13,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:13,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:13,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:13,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:13,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:13,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:13,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:13,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:13,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:13,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:13,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:13,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:13,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715936388] [2020-10-29 09:50:13,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:13,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:50:13,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698796670] [2020-10-29 09:50:13,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:50:13,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:13,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:50:13,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:50:13,534 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-10-29 09:50:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:14,106 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-29 09:50:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:50:14,107 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-29 09:50:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:14,108 INFO L225 Difference]: With dead ends: 42 [2020-10-29 09:50:14,108 INFO L226 Difference]: Without dead ends: 33 [2020-10-29 09:50:14,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:50:14,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-29 09:50:14,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-29 09:50:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:50:14,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-29 09:50:14,116 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-29 09:50:14,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:14,116 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-29 09:50:14,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:50:14,117 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-29 09:50:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:50:14,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:14,118 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:14,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:50:14,118 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:14,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:14,118 INFO L82 PathProgramCache]: Analyzing trace with hash -940348943, now seen corresponding path program 9 times [2020-10-29 09:50:14,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:14,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268163598] [2020-10-29 09:50:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:14,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:14,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:14,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:14,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:50:14,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:14,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-29 09:50:14,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:14,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:50:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:14,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 09:50:14,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:14,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:14,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:14,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:14,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:14,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:14,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:14,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:14,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:14,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:14,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:14,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:14,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:14,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268163598] [2020-10-29 09:50:14,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:14,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:50:14,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151340165] [2020-10-29 09:50:14,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:50:14,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:50:14,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:50:14,643 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-10-29 09:50:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:15,289 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-29 09:50:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:50:15,290 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-29 09:50:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:15,291 INFO L225 Difference]: With dead ends: 44 [2020-10-29 09:50:15,291 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:50:15,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:50:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:50:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-29 09:50:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 09:50:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-29 09:50:15,299 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-29 09:50:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:15,300 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-29 09:50:15,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:50:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-29 09:50:15,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:50:15,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:15,301 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:15,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:50:15,301 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:15,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:15,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1662051692, now seen corresponding path program 10 times [2020-10-29 09:50:15,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:15,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012565656] [2020-10-29 09:50:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:15,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:15,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:15,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:15,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:50:15,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:15,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-29 09:50:15,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:15,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:15,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:50:15,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:15,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 09:50:15,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:16,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:16,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:16,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:16,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:16,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:16,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 09:50:16,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:16,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:16,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:16,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:16,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:16,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:16,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012565656] [2020-10-29 09:50:16,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:16,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:50:16,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764080993] [2020-10-29 09:50:16,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:50:16,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:16,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:50:16,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:50:16,053 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2020-10-29 09:50:16,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:16,774 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-29 09:50:16,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:50:16,775 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-29 09:50:16,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:16,775 INFO L225 Difference]: With dead ends: 46 [2020-10-29 09:50:16,775 INFO L226 Difference]: Without dead ends: 37 [2020-10-29 09:50:16,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:50:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-29 09:50:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-29 09:50:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:50:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-29 09:50:16,784 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-29 09:50:16,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:16,785 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-29 09:50:16,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:50:16,785 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-29 09:50:16,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:50:16,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:16,786 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:16,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:50:16,786 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:16,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:16,787 INFO L82 PathProgramCache]: Analyzing trace with hash 566308471, now seen corresponding path program 11 times [2020-10-29 09:50:16,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:16,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541529795] [2020-10-29 09:50:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:16,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:16,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:17,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:17,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:50:17,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:17,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 504 [2020-10-29 09:50:17,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:17,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:17,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:50:17,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:17,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-29 09:50:17,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:17,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:17,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:17,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:17,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:17,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:17,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:17,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:17,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:17,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:17,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:17,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541529795] [2020-10-29 09:50:17,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:17,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:50:17,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019708611] [2020-10-29 09:50:17,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:50:17,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:17,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:50:17,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:50:17,577 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 15 states. [2020-10-29 09:50:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:18,370 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-10-29 09:50:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:50:18,370 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-29 09:50:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:18,371 INFO L225 Difference]: With dead ends: 48 [2020-10-29 09:50:18,371 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:50:18,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:50:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:50:18,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-29 09:50:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 09:50:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-29 09:50:18,381 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-29 09:50:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:18,381 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-29 09:50:18,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:50:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-29 09:50:18,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:50:18,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:18,382 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:18,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:50:18,383 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:18,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:18,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1168255590, now seen corresponding path program 12 times [2020-10-29 09:50:18,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:18,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139631355] [2020-10-29 09:50:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:18,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:18,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:18,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:18,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:50:18,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:18,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-29 09:50:18,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:18,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:18,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:50:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:18,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-29 09:50:18,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:19,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:19,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:19,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:19,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:19,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:19,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:19,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:19,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:19,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:19,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:19,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:19,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:19,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139631355] [2020-10-29 09:50:19,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:19,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:50:19,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144599387] [2020-10-29 09:50:19,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:50:19,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:19,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:50:19,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:50:19,168 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 16 states. [2020-10-29 09:50:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:20,074 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-29 09:50:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:50:20,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-29 09:50:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:20,076 INFO L225 Difference]: With dead ends: 50 [2020-10-29 09:50:20,076 INFO L226 Difference]: Without dead ends: 41 [2020-10-29 09:50:20,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:50:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-29 09:50:20,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-29 09:50:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:50:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-29 09:50:20,105 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-29 09:50:20,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:20,105 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-29 09:50:20,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:50:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-29 09:50:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:50:20,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:20,108 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:20,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:50:20,109 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:20,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:20,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1637007363, now seen corresponding path program 13 times [2020-10-29 09:50:20,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:20,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408879512] [2020-10-29 09:50:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:20,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:20,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:20,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:20,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:50:20,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:20,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 592 [2020-10-29 09:50:20,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:20,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:20,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:50:20,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:20,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 09:50:20,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:21,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:21,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:21,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:21,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:21,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:21,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 09:50:21,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:21,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:21,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:21,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:21,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:21,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:21,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408879512] [2020-10-29 09:50:21,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:21,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:50:21,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217353151] [2020-10-29 09:50:21,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:50:21,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:21,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:50:21,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:50:21,049 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2020-10-29 09:50:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:22,001 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-29 09:50:22,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:50:22,002 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-29 09:50:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:22,003 INFO L225 Difference]: With dead ends: 52 [2020-10-29 09:50:22,003 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:50:22,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:50:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:50:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-29 09:50:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-29 09:50:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-29 09:50:22,011 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-29 09:50:22,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:22,011 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-29 09:50:22,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:50:22,012 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-29 09:50:22,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 09:50:22,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:22,013 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:22,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:50:22,013 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:22,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1135895136, now seen corresponding path program 14 times [2020-10-29 09:50:22,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:22,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483025319] [2020-10-29 09:50:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:22,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:22,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:22,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:22,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 09:50:22,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:22,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-10-29 09:50:22,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:22,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:22,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:50:22,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:22,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 09:50:22,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:22,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:22,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:22,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:22,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:22,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:22,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:22,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:22,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:22,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:22,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:22,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:22,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:22,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483025319] [2020-10-29 09:50:22,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:22,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:50:22,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007573230] [2020-10-29 09:50:22,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:50:22,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:22,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:50:22,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:50:22,826 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 18 states. [2020-10-29 09:50:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:23,984 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-29 09:50:23,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:50:23,985 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-29 09:50:23,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:23,986 INFO L225 Difference]: With dead ends: 54 [2020-10-29 09:50:23,986 INFO L226 Difference]: Without dead ends: 45 [2020-10-29 09:50:23,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:50:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-29 09:50:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-29 09:50:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:50:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-29 09:50:23,996 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-29 09:50:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:23,996 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-29 09:50:23,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:50:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-29 09:50:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:50:23,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:23,997 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:23,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:50:23,997 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:23,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:23,998 INFO L82 PathProgramCache]: Analyzing trace with hash -603382141, now seen corresponding path program 15 times [2020-10-29 09:50:23,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:23,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268845444] [2020-10-29 09:50:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:24,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:24,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:24,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:24,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:50:24,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:24,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-29 09:50:24,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:24,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:24,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:50:24,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:24,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-29 09:50:24,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:24,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:24,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:25,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:25,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:25,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:25,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:50:25,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:25,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:25,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:25,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:25,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268845444] [2020-10-29 09:50:25,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:25,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:50:25,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693803936] [2020-10-29 09:50:25,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:50:25,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:25,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:50:25,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:50:25,015 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 19 states. [2020-10-29 09:50:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:26,212 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-10-29 09:50:26,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:50:26,213 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-29 09:50:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:26,214 INFO L225 Difference]: With dead ends: 56 [2020-10-29 09:50:26,214 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:50:26,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:50:26,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:50:26,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-29 09:50:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 09:50:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-29 09:50:26,223 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-29 09:50:26,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:26,224 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-29 09:50:26,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:50:26,224 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-29 09:50:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 09:50:26,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:26,225 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:26,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:50:26,225 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:26,225 INFO L82 PathProgramCache]: Analyzing trace with hash 40497830, now seen corresponding path program 16 times [2020-10-29 09:50:26,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:26,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364330565] [2020-10-29 09:50:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:26,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:26,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:26,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:26,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 09:50:26,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:26,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-10-29 09:50:26,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:26,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:26,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:50:26,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:26,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-29 09:50:26,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:27,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:27,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:27,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:27,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:27,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:27,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:27,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:27,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:27,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:27,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:27,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:27,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:27,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364330565] [2020-10-29 09:50:27,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:27,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:50:27,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675020851] [2020-10-29 09:50:27,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:50:27,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:50:27,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:50:27,277 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2020-10-29 09:50:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:28,676 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-29 09:50:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:50:28,677 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-29 09:50:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:28,677 INFO L225 Difference]: With dead ends: 58 [2020-10-29 09:50:28,677 INFO L226 Difference]: Without dead ends: 49 [2020-10-29 09:50:28,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:50:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-29 09:50:28,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-29 09:50:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:50:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-29 09:50:28,690 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-29 09:50:28,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:28,691 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-29 09:50:28,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:50:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-29 09:50:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:50:28,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:28,692 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:28,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:50:28,693 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:28,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:28,694 INFO L82 PathProgramCache]: Analyzing trace with hash 333859337, now seen corresponding path program 17 times [2020-10-29 09:50:28,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:28,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460876035] [2020-10-29 09:50:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:28,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:28,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:29,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:29,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:50:29,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:29,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 608 [2020-10-29 09:50:29,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:29,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:29,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:50:29,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:29,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 09:50:29,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:29,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:29,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:29,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:29,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:29,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:29,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:29,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:29,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:29,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:29,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:29,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:29,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:50:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:29,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460876035] [2020-10-29 09:50:29,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:29,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:50:29,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895443376] [2020-10-29 09:50:29,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:50:29,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:29,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:50:29,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:50:29,830 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 21 states. [2020-10-29 09:50:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:31,331 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-10-29 09:50:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:50:31,332 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-29 09:50:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:31,332 INFO L225 Difference]: With dead ends: 60 [2020-10-29 09:50:31,332 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:50:31,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:50:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:50:31,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-29 09:50:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-29 09:50:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-29 09:50:31,348 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-29 09:50:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:31,348 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-29 09:50:31,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:50:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-29 09:50:31,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-29 09:50:31,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:31,349 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:31,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:50:31,349 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:31,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:31,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1213573972, now seen corresponding path program 18 times [2020-10-29 09:50:31,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:31,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699888898] [2020-10-29 09:50:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:31,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:31,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:32,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:32,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-29 09:50:32,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:32,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 896 [2020-10-29 09:50:32,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:32,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:32,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:50:32,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:32,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 09:50:32,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:32,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:32,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:32,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:32,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:32,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:32,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:50:32,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:32,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:32,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:32,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:32,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:32,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:32,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699888898] [2020-10-29 09:50:32,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:32,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:50:32,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973535676] [2020-10-29 09:50:32,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:50:32,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:50:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:50:32,777 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 22 states. [2020-10-29 09:50:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:34,287 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-29 09:50:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:50:34,288 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-29 09:50:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:34,288 INFO L225 Difference]: With dead ends: 62 [2020-10-29 09:50:34,288 INFO L226 Difference]: Without dead ends: 53 [2020-10-29 09:50:34,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:50:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-29 09:50:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-29 09:50:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:50:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-29 09:50:34,298 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-29 09:50:34,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:34,298 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-29 09:50:34,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:50:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-29 09:50:34,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:50:34,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:34,299 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:34,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:50:34,299 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:34,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:34,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2056667791, now seen corresponding path program 19 times [2020-10-29 09:50:34,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:34,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269565369] [2020-10-29 09:50:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:34,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:34,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:35,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:50:35,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:35,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 868 [2020-10-29 09:50:35,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:35,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:50:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 09:50:35,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:35,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:35,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:35,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:35,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:35,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:35,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:35,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:35,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:35,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269565369] [2020-10-29 09:50:35,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:35,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:50:35,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874280597] [2020-10-29 09:50:35,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:50:35,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:35,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:50:35,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:50:35,699 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 23 states. [2020-10-29 09:50:37,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:37,451 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-29 09:50:37,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:50:37,452 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-29 09:50:37,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:37,453 INFO L225 Difference]: With dead ends: 64 [2020-10-29 09:50:37,453 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:50:37,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:50:37,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:50:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-29 09:50:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 09:50:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-29 09:50:37,462 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-29 09:50:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:37,462 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-29 09:50:37,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:50:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-29 09:50:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 09:50:37,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:37,463 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:37,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:50:37,463 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:37,464 INFO L82 PathProgramCache]: Analyzing trace with hash 842941362, now seen corresponding path program 20 times [2020-10-29 09:50:37,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:37,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069505586] [2020-10-29 09:50:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:37,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:37,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:38,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:38,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 09:50:38,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:38,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-29 09:50:38,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:38,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:50:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 09:50:38,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:38,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:38,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:38,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:38,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:38,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:38,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:38,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:38,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:38,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:38,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:38,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:38,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:38,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069505586] [2020-10-29 09:50:38,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:38,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:50:38,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327457131] [2020-10-29 09:50:38,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:50:38,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:38,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:50:38,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:50:38,736 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 24 states. [2020-10-29 09:50:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:40,599 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-10-29 09:50:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:50:40,600 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-29 09:50:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:40,601 INFO L225 Difference]: With dead ends: 66 [2020-10-29 09:50:40,601 INFO L226 Difference]: Without dead ends: 57 [2020-10-29 09:50:40,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:50:40,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-29 09:50:40,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-29 09:50:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:50:40,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-29 09:50:40,610 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-29 09:50:40,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:40,611 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-29 09:50:40,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:50:40,611 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-29 09:50:40,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:50:40,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:40,611 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:40,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:50:40,612 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:40,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:40,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1612019691, now seen corresponding path program 21 times [2020-10-29 09:50:40,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:40,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126815905] [2020-10-29 09:50:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:40,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:40,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:41,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:41,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:50:41,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:41,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 978 [2020-10-29 09:50:41,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:41,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:41,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:50:41,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:41,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 09:50:41,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:42,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:42,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:42,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:42,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:42,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:42,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:42,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:42,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:42,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:42,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:42,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:42,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:42,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126815905] [2020-10-29 09:50:42,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:42,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:50:42,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694923020] [2020-10-29 09:50:42,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:50:42,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:42,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:50:42,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:50:42,241 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 25 states. [2020-10-29 09:50:44,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:44,318 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-10-29 09:50:44,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:50:44,319 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-29 09:50:44,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:44,320 INFO L225 Difference]: With dead ends: 68 [2020-10-29 09:50:44,320 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 09:50:44,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:50:44,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 09:50:44,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-29 09:50:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-29 09:50:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-29 09:50:44,328 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-29 09:50:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:44,329 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-29 09:50:44,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:50:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-29 09:50:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 09:50:44,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:44,330 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:44,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:50:44,330 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1402421176, now seen corresponding path program 22 times [2020-10-29 09:50:44,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:44,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741628637] [2020-10-29 09:50:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:44,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:44,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:45,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:45,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 09:50:45,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:45,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-10-29 09:50:45,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:45,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:45,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:50:45,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:45,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 09:50:45,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:45,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:45,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:45,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:45,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:45,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:45,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:45,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:45,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:45,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:45,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:45,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:45,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:45,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741628637] [2020-10-29 09:50:45,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:45,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:50:45,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140707882] [2020-10-29 09:50:45,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:50:45,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:45,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:50:45,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:50:45,998 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 26 states. [2020-10-29 09:50:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:48,156 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-10-29 09:50:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:50:48,157 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-29 09:50:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:48,158 INFO L225 Difference]: With dead ends: 70 [2020-10-29 09:50:48,158 INFO L226 Difference]: Without dead ends: 61 [2020-10-29 09:50:48,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:50:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-29 09:50:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-29 09:50:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:50:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-29 09:50:48,167 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-10-29 09:50:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:48,167 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-29 09:50:48,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:50:48,167 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-29 09:50:48,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:50:48,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:48,168 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:48,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:50:48,168 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:48,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:48,169 INFO L82 PathProgramCache]: Analyzing trace with hash -822830437, now seen corresponding path program 23 times [2020-10-29 09:50:48,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:48,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819986237] [2020-10-29 09:50:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:48,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:48,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:49,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:49,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:50:49,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:49,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 929 [2020-10-29 09:50:49,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:49,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:49,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:50:49,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:49,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 09:50:49,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:49,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:49,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:49,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:49,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:49,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:49,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:49,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:49,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:49,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:49,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:49,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:49,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:49,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819986237] [2020-10-29 09:50:49,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:49,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:50:49,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611947548] [2020-10-29 09:50:49,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:50:49,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:49,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:50:49,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:50:49,839 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 27 states. [2020-10-29 09:50:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:52,233 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-10-29 09:50:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:50:52,234 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-29 09:50:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:52,235 INFO L225 Difference]: With dead ends: 72 [2020-10-29 09:50:52,235 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 09:50:52,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-29 09:50:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 09:50:52,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-29 09:50:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 09:50:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-29 09:50:52,243 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2020-10-29 09:50:52,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:52,243 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-29 09:50:52,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:50:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-29 09:50:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 09:50:52,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:52,244 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:52,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:50:52,244 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash -395917122, now seen corresponding path program 24 times [2020-10-29 09:50:52,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:52,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591095237] [2020-10-29 09:50:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:52,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:52,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:53,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:53,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 09:50:53,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:53,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-10-29 09:50:53,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:53,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:50:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:53,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 09:50:53,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:54,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:54,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:54,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:54,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:54,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:54,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:50:54,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:54,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:54,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:54,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:54,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:54,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:54,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591095237] [2020-10-29 09:50:54,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:54,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:50:54,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474127000] [2020-10-29 09:50:54,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:50:54,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:54,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:50:54,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:50:54,121 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 28 states. [2020-10-29 09:50:56,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:50:56,673 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-29 09:50:56,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:50:56,674 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-29 09:50:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:50:56,675 INFO L225 Difference]: With dead ends: 74 [2020-10-29 09:50:56,675 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 09:50:56,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-29 09:50:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 09:50:56,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-29 09:50:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 09:50:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-29 09:50:56,683 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2020-10-29 09:50:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:50:56,683 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-29 09:50:56,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:50:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-29 09:50:56,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 09:50:56,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:50:56,684 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:50:56,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:50:56,684 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:50:56,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:50:56,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1845885473, now seen corresponding path program 25 times [2020-10-29 09:50:56,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:50:56,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233040664] [2020-10-29 09:50:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:50:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:56,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:56,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:57,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:57,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 09:50:57,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:50:57,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1104 [2020-10-29 09:50:57,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:57,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:57,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:50:57,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:50:57,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 09:50:57,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:58,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:50:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:50:58,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:50:58,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:50:58,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:50:58,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:50:58,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:50:58,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:50:58,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:50:58,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:50:58,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:50:58,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:50:58,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:50:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:50:58,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233040664] [2020-10-29 09:50:58,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:50:58,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:50:58,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340465849] [2020-10-29 09:50:58,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:50:58,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:50:58,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:50:58,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:50:58,598 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 29 states. [2020-10-29 09:51:01,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:01,333 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-10-29 09:51:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:51:01,334 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-29 09:51:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:01,335 INFO L225 Difference]: With dead ends: 76 [2020-10-29 09:51:01,336 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:51:01,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 09:51:01,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:51:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-29 09:51:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-29 09:51:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-29 09:51:01,344 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-10-29 09:51:01,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:01,345 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-29 09:51:01,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:51:01,345 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-29 09:51:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 09:51:01,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:01,346 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:01,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:51:01,346 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash 144596676, now seen corresponding path program 26 times [2020-10-29 09:51:01,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:01,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110438407] [2020-10-29 09:51:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:01,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:01,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:02,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:02,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 09:51:02,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:02,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-29 09:51:02,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:02,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:51:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:02,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 09:51:02,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:03,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:03,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:03,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:03,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:03,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:03,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:03,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:03,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:03,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:03,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:03,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:03,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:03,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110438407] [2020-10-29 09:51:03,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:03,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:51:03,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167590444] [2020-10-29 09:51:03,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:51:03,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:03,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:51:03,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:51:03,234 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 30 states. [2020-10-29 09:51:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:06,157 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-29 09:51:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:51:06,158 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-29 09:51:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:06,159 INFO L225 Difference]: With dead ends: 78 [2020-10-29 09:51:06,159 INFO L226 Difference]: Without dead ends: 69 [2020-10-29 09:51:06,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-29 09:51:06,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-29 09:51:06,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-29 09:51:06,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-29 09:51:06,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-29 09:51:06,169 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-10-29 09:51:06,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:06,169 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-29 09:51:06,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:51:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-29 09:51:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 09:51:06,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:06,170 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:06,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:51:06,170 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1588602535, now seen corresponding path program 27 times [2020-10-29 09:51:06,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:06,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824703117] [2020-10-29 09:51:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:06,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:06,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:07,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:07,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 09:51:07,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:07,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906 [2020-10-29 09:51:07,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:07,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:07,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:51:07,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:07,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 09:51:07,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:08,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:08,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:08,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:08,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:08,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:08,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:08,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:08,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:08,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:08,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:08,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:08,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:08,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824703117] [2020-10-29 09:51:08,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:08,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:51:08,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601976933] [2020-10-29 09:51:08,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:51:08,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:08,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:51:08,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:51:08,032 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 31 states. [2020-10-29 09:51:11,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:11,115 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2020-10-29 09:51:11,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:51:11,115 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-29 09:51:11,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:11,117 INFO L225 Difference]: With dead ends: 80 [2020-10-29 09:51:11,117 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:51:11,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-29 09:51:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:51:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-29 09:51:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 09:51:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-29 09:51:11,125 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-10-29 09:51:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:11,126 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-29 09:51:11,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:51:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-29 09:51:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 09:51:11,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:11,126 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:11,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:51:11,127 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:11,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:11,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2003796426, now seen corresponding path program 28 times [2020-10-29 09:51:11,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:11,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337218861] [2020-10-29 09:51:11,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:11,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:11,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:11,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:11,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 09:51:11,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:11,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 787 [2020-10-29 09:51:11,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:11,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:11,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:51:11,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:11,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 09:51:11,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:12,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:12,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:12,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:12,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:12,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:12,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:12,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:12,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:12,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:12,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:12,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:12,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:12,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337218861] [2020-10-29 09:51:12,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:12,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:51:12,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434400667] [2020-10-29 09:51:12,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:51:12,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:51:12,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:51:12,910 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 32 states. [2020-10-29 09:51:16,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:16,136 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-29 09:51:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:51:16,137 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-29 09:51:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:16,138 INFO L225 Difference]: With dead ends: 82 [2020-10-29 09:51:16,138 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 09:51:16,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 09:51:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 09:51:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-29 09:51:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:51:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-29 09:51:16,147 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2020-10-29 09:51:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:16,147 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-29 09:51:16,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:51:16,147 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-29 09:51:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:51:16,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:16,148 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:16,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:51:16,148 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1573167149, now seen corresponding path program 29 times [2020-10-29 09:51:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:16,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589178329] [2020-10-29 09:51:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:16,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:16,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:17,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:17,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 09:51:17,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:17,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1032 [2020-10-29 09:51:17,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:17,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:17,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:51:17,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:17,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 09:51:17,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:18,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:18,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:18,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:18,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:18,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:18,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:18,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:18,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:18,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:18,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:18,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589178329] [2020-10-29 09:51:18,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:18,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:51:18,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040191976] [2020-10-29 09:51:18,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:51:18,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:18,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:51:18,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:51:18,166 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 33 states. [2020-10-29 09:51:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:21,665 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2020-10-29 09:51:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:51:21,665 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-29 09:51:21,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:21,667 INFO L225 Difference]: With dead ends: 84 [2020-10-29 09:51:21,667 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 09:51:21,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-29 09:51:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 09:51:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-29 09:51:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-29 09:51:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-29 09:51:21,678 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2020-10-29 09:51:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:21,678 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-29 09:51:21,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:51:21,678 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-29 09:51:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-29 09:51:21,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:21,679 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:21,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:51:21,680 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:21,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:21,680 INFO L82 PathProgramCache]: Analyzing trace with hash 55292368, now seen corresponding path program 30 times [2020-10-29 09:51:21,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:21,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293517025] [2020-10-29 09:51:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:21,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:21,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:22,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:22,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-29 09:51:22,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:22,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1102 [2020-10-29 09:51:22,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:22,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:22,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:51:22,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:22,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 09:51:22,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:23,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:23,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:23,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:23,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:23,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:23,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:23,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:23,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:23,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:23,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:23,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:23,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:23,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293517025] [2020-10-29 09:51:23,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:23,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 09:51:23,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203023045] [2020-10-29 09:51:23,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 09:51:23,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:23,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 09:51:23,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:51:23,861 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 34 states. [2020-10-29 09:51:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:27,544 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2020-10-29 09:51:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:51:27,545 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-29 09:51:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:27,546 INFO L225 Difference]: With dead ends: 86 [2020-10-29 09:51:27,546 INFO L226 Difference]: Without dead ends: 77 [2020-10-29 09:51:27,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-29 09:51:27,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-29 09:51:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-29 09:51:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 09:51:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-29 09:51:27,555 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-10-29 09:51:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:27,555 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-29 09:51:27,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 09:51:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-29 09:51:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 09:51:27,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:27,556 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:27,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:51:27,556 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:27,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:27,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1666508467, now seen corresponding path program 31 times [2020-10-29 09:51:27,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:27,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001389612] [2020-10-29 09:51:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:27,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:27,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:29,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:29,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 09:51:29,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:29,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1470 [2020-10-29 09:51:29,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:29,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:29,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 09:51:29,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:29,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 09:51:29,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:30,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:30,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:30,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:30,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:30,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:30,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:51:30,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:30,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:30,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:30,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:30,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:30,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:30,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001389612] [2020-10-29 09:51:30,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:30,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:51:30,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120003563] [2020-10-29 09:51:30,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:51:30,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:30,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:51:30,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:51:30,064 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 35 states. [2020-10-29 09:51:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:33,942 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2020-10-29 09:51:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:51:33,948 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-29 09:51:33,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:33,949 INFO L225 Difference]: With dead ends: 88 [2020-10-29 09:51:33,949 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 09:51:33,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-29 09:51:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 09:51:33,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-29 09:51:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-29 09:51:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-29 09:51:33,957 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2020-10-29 09:51:33,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:33,957 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-29 09:51:33,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 09:51:33,957 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-29 09:51:33,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 09:51:33,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:33,958 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:33,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:51:33,958 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:33,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:33,959 INFO L82 PathProgramCache]: Analyzing trace with hash -438014250, now seen corresponding path program 32 times [2020-10-29 09:51:33,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:33,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524255691] [2020-10-29 09:51:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:33,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:34,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:34,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:34,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 09:51:34,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:34,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 985 [2020-10-29 09:51:34,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:34,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:34,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:51:34,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:34,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-29 09:51:34,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:36,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:36,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:36,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:36,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:36,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:36,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:51:36,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:36,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:36,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:36,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:36,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:36,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:36,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524255691] [2020-10-29 09:51:36,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:36,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 09:51:36,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222022510] [2020-10-29 09:51:36,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 09:51:36,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:36,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 09:51:36,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:51:36,182 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 36 states. [2020-10-29 09:51:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:40,215 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-10-29 09:51:40,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:51:40,216 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-29 09:51:40,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:40,217 INFO L225 Difference]: With dead ends: 90 [2020-10-29 09:51:40,217 INFO L226 Difference]: Without dead ends: 81 [2020-10-29 09:51:40,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 09:51:40,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-29 09:51:40,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-29 09:51:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 09:51:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-29 09:51:40,227 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2020-10-29 09:51:40,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:40,227 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-29 09:51:40,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 09:51:40,227 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-29 09:51:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 09:51:40,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:40,228 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:40,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:51:40,228 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:40,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:40,231 INFO L82 PathProgramCache]: Analyzing trace with hash 45251129, now seen corresponding path program 33 times [2020-10-29 09:51:40,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:40,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134354930] [2020-10-29 09:51:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:40,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:40,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:41,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:41,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 09:51:41,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:41,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1079 [2020-10-29 09:51:41,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:41,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:41,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:51:41,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:41,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 09:51:41,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:42,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:42,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:42,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:42,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:42,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:42,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:42,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:42,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:42,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:42,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:42,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:42,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:42,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134354930] [2020-10-29 09:51:42,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:42,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 09:51:42,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432412421] [2020-10-29 09:51:42,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 09:51:42,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:42,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 09:51:42,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:51:42,620 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 37 states. [2020-10-29 09:51:46,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:46,978 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2020-10-29 09:51:46,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 09:51:46,978 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-29 09:51:46,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:46,980 INFO L225 Difference]: With dead ends: 92 [2020-10-29 09:51:46,980 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:51:46,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-29 09:51:46,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:51:46,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-29 09:51:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-29 09:51:46,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-29 09:51:46,986 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-10-29 09:51:46,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:46,986 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-29 09:51:46,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 09:51:46,986 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-29 09:51:46,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 09:51:46,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:46,987 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:46,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:51:46,987 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:46,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:46,987 INFO L82 PathProgramCache]: Analyzing trace with hash 606812380, now seen corresponding path program 34 times [2020-10-29 09:51:46,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:46,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662520465] [2020-10-29 09:51:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:47,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:47,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:48,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:48,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 09:51:48,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:48,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1381 [2020-10-29 09:51:48,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:48,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:48,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:51:48,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:48,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 09:51:48,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:49,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:49,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:49,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:49,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:49,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:49,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:49,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:49,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:49,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:49,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:49,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:49,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:49,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662520465] [2020-10-29 09:51:49,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:49,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 09:51:49,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582448697] [2020-10-29 09:51:49,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 09:51:49,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:49,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 09:51:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:51:49,794 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 38 states. [2020-10-29 09:51:54,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:51:54,512 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-10-29 09:51:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:51:54,513 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-29 09:51:54,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:51:54,514 INFO L225 Difference]: With dead ends: 94 [2020-10-29 09:51:54,514 INFO L226 Difference]: Without dead ends: 85 [2020-10-29 09:51:54,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-29 09:51:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-29 09:51:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-29 09:51:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-29 09:51:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-29 09:51:54,524 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2020-10-29 09:51:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:51:54,524 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-29 09:51:54,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 09:51:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-29 09:51:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 09:51:54,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:51:54,525 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:51:54,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:51:54,525 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:51:54,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:51:54,526 INFO L82 PathProgramCache]: Analyzing trace with hash -898704705, now seen corresponding path program 35 times [2020-10-29 09:51:54,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:51:54,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699164737] [2020-10-29 09:51:54,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:51:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:54,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:54,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:56,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:56,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 09:51:56,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:51:56,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1843 [2020-10-29 09:51:56,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:56,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:56,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 09:51:56,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:51:56,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 09:51:56,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:57,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:51:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:51:57,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:51:57,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:51:57,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:51:57,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:51:57,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:51:57,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:51:57,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:51:57,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:51:57,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:51:57,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:51:57,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:51:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:51:57,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699164737] [2020-10-29 09:51:57,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:51:57,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 09:51:57,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679335531] [2020-10-29 09:51:57,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 09:51:57,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:51:57,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 09:51:57,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:51:57,828 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 39 states. [2020-10-29 09:52:02,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:02,797 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-10-29 09:52:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 09:52:02,798 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-29 09:52:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:02,799 INFO L225 Difference]: With dead ends: 96 [2020-10-29 09:52:02,799 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 09:52:02,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-29 09:52:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 09:52:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-29 09:52:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 09:52:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-29 09:52:02,807 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2020-10-29 09:52:02,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:02,807 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-29 09:52:02,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 09:52:02,807 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-29 09:52:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 09:52:02,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:02,808 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:02,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:52:02,808 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:02,809 INFO L82 PathProgramCache]: Analyzing trace with hash -296644638, now seen corresponding path program 36 times [2020-10-29 09:52:02,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:02,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772672872] [2020-10-29 09:52:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:02,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:02,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:04,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:04,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 09:52:04,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:04,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1688 [2020-10-29 09:52:04,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:04,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:04,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:52:04,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:04,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-29 09:52:04,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:06,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:06,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:06,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:06,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:06,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:06,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:06,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:06,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:06,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:06,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:06,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:06,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:06,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772672872] [2020-10-29 09:52:06,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:06,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 09:52:06,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286220067] [2020-10-29 09:52:06,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 09:52:06,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:06,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 09:52:06,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:52:06,083 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 40 states. [2020-10-29 09:52:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:11,300 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-10-29 09:52:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 09:52:11,301 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-29 09:52:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:11,302 INFO L225 Difference]: With dead ends: 98 [2020-10-29 09:52:11,302 INFO L226 Difference]: Without dead ends: 89 [2020-10-29 09:52:11,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-29 09:52:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-29 09:52:11,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-29 09:52:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:52:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-29 09:52:11,312 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2020-10-29 09:52:11,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:11,312 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-29 09:52:11,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 09:52:11,312 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-29 09:52:11,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-29 09:52:11,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:11,313 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:11,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:52:11,313 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:11,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1537505211, now seen corresponding path program 37 times [2020-10-29 09:52:11,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:11,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297227181] [2020-10-29 09:52:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:11,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:11,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:12,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:12,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-29 09:52:12,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:12,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1610 [2020-10-29 09:52:12,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:12,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 09:52:12,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:12,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 09:52:12,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:14,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:14,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:14,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:14,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:14,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:14,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:52:14,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:14,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:14,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:14,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:14,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:14,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:14,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297227181] [2020-10-29 09:52:14,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:14,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 09:52:14,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833885374] [2020-10-29 09:52:14,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 09:52:14,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:14,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 09:52:14,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:52:14,503 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 41 states. [2020-10-29 09:52:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:19,914 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2020-10-29 09:52:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 09:52:19,915 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-29 09:52:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:19,916 INFO L225 Difference]: With dead ends: 100 [2020-10-29 09:52:19,916 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 09:52:19,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-29 09:52:19,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 09:52:19,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-29 09:52:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-29 09:52:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-29 09:52:19,925 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2020-10-29 09:52:19,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:19,925 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-29 09:52:19,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 09:52:19,925 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-29 09:52:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-29 09:52:19,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:19,926 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:19,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:52:19,926 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:19,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:19,927 INFO L82 PathProgramCache]: Analyzing trace with hash -3607576, now seen corresponding path program 38 times [2020-10-29 09:52:19,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:19,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417492940] [2020-10-29 09:52:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:19,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:20,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:21,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:21,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-29 09:52:21,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:21,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1855 [2020-10-29 09:52:21,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:21,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 09:52:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 09:52:21,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:23,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:23,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:23,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:23,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:23,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:23,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:23,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:23,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:23,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:23,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:23,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:23,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:23,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417492940] [2020-10-29 09:52:23,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:23,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 09:52:23,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122875512] [2020-10-29 09:52:23,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 09:52:23,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:23,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 09:52:23,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:52:23,479 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 42 states. [2020-10-29 09:52:29,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:29,168 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2020-10-29 09:52:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 09:52:29,169 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-29 09:52:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:29,170 INFO L225 Difference]: With dead ends: 102 [2020-10-29 09:52:29,170 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 09:52:29,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-29 09:52:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 09:52:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-29 09:52:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:52:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-29 09:52:29,181 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2020-10-29 09:52:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:29,181 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-29 09:52:29,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-29 09:52:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-29 09:52:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-29 09:52:29,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:29,182 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:29,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:52:29,182 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:29,183 INFO L82 PathProgramCache]: Analyzing trace with hash 898237131, now seen corresponding path program 39 times [2020-10-29 09:52:29,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:29,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721357921] [2020-10-29 09:52:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:29,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:30,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:31,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:31,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 09:52:31,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:31,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2417 [2020-10-29 09:52:31,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:31,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:31,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-29 09:52:31,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:31,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 09:52:31,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:33,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:33,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:33,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:33,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:33,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:33,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:33,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:33,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:33,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:33,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:33,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:33,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:33,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721357921] [2020-10-29 09:52:33,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:33,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 09:52:33,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581826292] [2020-10-29 09:52:33,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 09:52:33,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:33,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 09:52:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:52:33,333 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 43 states. [2020-10-29 09:52:39,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:39,321 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-29 09:52:39,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 09:52:39,322 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-29 09:52:39,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:39,323 INFO L225 Difference]: With dead ends: 104 [2020-10-29 09:52:39,323 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 09:52:39,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-29 09:52:39,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 09:52:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-29 09:52:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-29 09:52:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-29 09:52:39,332 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2020-10-29 09:52:39,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:39,332 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-29 09:52:39,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 09:52:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-29 09:52:39,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-29 09:52:39,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:39,333 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:39,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:52:39,333 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:39,334 INFO L82 PathProgramCache]: Analyzing trace with hash -12393234, now seen corresponding path program 40 times [2020-10-29 09:52:39,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:39,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426268642] [2020-10-29 09:52:39,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:39,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:40,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:41,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:41,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-29 09:52:41,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:41,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2004 [2020-10-29 09:52:41,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:41,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 09:52:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-29 09:52:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:43,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:43,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:43,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:43,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:43,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:43,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:52:43,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:43,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:43,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:43,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:43,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:43,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426268642] [2020-10-29 09:52:43,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:43,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-29 09:52:43,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431545871] [2020-10-29 09:52:43,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-29 09:52:43,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:43,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-29 09:52:43,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:52:43,193 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 44 states. [2020-10-29 09:52:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:49,358 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2020-10-29 09:52:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:52:49,359 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-29 09:52:49,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:49,360 INFO L225 Difference]: With dead ends: 106 [2020-10-29 09:52:49,361 INFO L226 Difference]: Without dead ends: 97 [2020-10-29 09:52:49,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-29 09:52:49,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-29 09:52:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-29 09:52:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:52:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-29 09:52:49,371 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2020-10-29 09:52:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:49,372 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-29 09:52:49,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-29 09:52:49,372 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-29 09:52:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 09:52:49,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:49,373 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:49,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-29 09:52:49,373 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:49,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:49,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1045154385, now seen corresponding path program 41 times [2020-10-29 09:52:49,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:49,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692731814] [2020-10-29 09:52:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:49,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:49,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:51,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:51,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 09:52:51,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:51,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2507 [2020-10-29 09:52:51,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:51,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:51,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-29 09:52:51,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:51,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-29 09:52:51,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:53,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:53,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:53,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:53,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:53,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:53,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:52:53,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:53,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:53,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:53,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:53,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:53,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692731814] [2020-10-29 09:52:53,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:53,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-29 09:52:53,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008778813] [2020-10-29 09:52:53,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-29 09:52:53,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:53,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-29 09:52:53,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 09:52:53,824 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 45 states. [2020-10-29 09:53:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:00,171 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-10-29 09:53:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-29 09:53:00,171 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-29 09:53:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:00,173 INFO L225 Difference]: With dead ends: 108 [2020-10-29 09:53:00,173 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 09:53:00,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2020-10-29 09:53:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 09:53:00,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-29 09:53:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-29 09:53:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-29 09:53:00,182 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2020-10-29 09:53:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:00,182 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-29 09:53:00,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-29 09:53:00,182 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-29 09:53:00,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-29 09:53:00,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:00,183 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:00,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-29 09:53:00,184 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:00,184 INFO L82 PathProgramCache]: Analyzing trace with hash -558832908, now seen corresponding path program 42 times [2020-10-29 09:53:00,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:00,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844804781] [2020-10-29 09:53:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:00,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:00,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:02,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:02,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-29 09:53:02,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:02,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2097 [2020-10-29 09:53:02,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:02,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:02,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 09:53:02,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:02,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 09:53:02,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:04,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:04,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:04,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:04,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:04,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:04,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:04,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:04,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:04,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:04,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:04,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:04,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:04,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844804781] [2020-10-29 09:53:04,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:04,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-29 09:53:04,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467975410] [2020-10-29 09:53:04,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-29 09:53:04,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:04,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-29 09:53:04,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-29 09:53:04,324 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 46 states. [2020-10-29 09:53:10,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:10,996 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2020-10-29 09:53:10,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-29 09:53:10,997 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-29 09:53:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:10,999 INFO L225 Difference]: With dead ends: 110 [2020-10-29 09:53:10,999 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 09:53:11,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-29 09:53:11,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 09:53:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-29 09:53:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:53:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-29 09:53:11,007 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2020-10-29 09:53:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:11,007 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-29 09:53:11,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-29 09:53:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-29 09:53:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-29 09:53:11,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:11,008 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:11,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-29 09:53:11,008 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:11,009 INFO L82 PathProgramCache]: Analyzing trace with hash -97362217, now seen corresponding path program 43 times [2020-10-29 09:53:11,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:11,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435553363] [2020-10-29 09:53:11,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:11,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:12,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:13,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:13,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 09:53:13,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:13,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2866 [2020-10-29 09:53:13,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:13,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:13,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-29 09:53:13,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:13,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-29 09:53:13,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:15,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:15,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:15,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:15,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:15,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:15,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:15,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:15,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:15,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:15,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:15,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:15,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435553363] [2020-10-29 09:53:15,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:15,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-29 09:53:15,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145822455] [2020-10-29 09:53:16,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-29 09:53:16,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:16,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-29 09:53:16,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2020-10-29 09:53:16,001 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 47 states. [2020-10-29 09:53:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:23,053 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2020-10-29 09:53:23,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 09:53:23,054 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2020-10-29 09:53:23,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:23,055 INFO L225 Difference]: With dead ends: 112 [2020-10-29 09:53:23,055 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:53:23,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2020-10-29 09:53:23,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:53:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-29 09:53:23,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-29 09:53:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-29 09:53:23,066 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2020-10-29 09:53:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:23,067 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-29 09:53:23,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-29 09:53:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-29 09:53:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-29 09:53:23,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:23,067 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:23,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-29 09:53:23,068 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:23,068 INFO L82 PathProgramCache]: Analyzing trace with hash 994340346, now seen corresponding path program 44 times [2020-10-29 09:53:23,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:23,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464012956] [2020-10-29 09:53:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:23,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:24,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:25,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:25,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-29 09:53:25,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:25,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2867 [2020-10-29 09:53:25,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:25,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:25,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-29 09:53:25,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:25,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-29 09:53:25,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:28,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:28,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:28,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:28,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:28,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:28,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:28,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:28,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:28,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:28,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:28,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:28,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:28,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464012956] [2020-10-29 09:53:28,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:28,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-29 09:53:28,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947292743] [2020-10-29 09:53:28,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-29 09:53:28,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:28,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-29 09:53:28,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-29 09:53:28,212 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 48 states. [2020-10-29 09:53:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:35,556 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2020-10-29 09:53:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-29 09:53:35,557 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-10-29 09:53:35,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:35,558 INFO L225 Difference]: With dead ends: 114 [2020-10-29 09:53:35,558 INFO L226 Difference]: Without dead ends: 105 [2020-10-29 09:53:35,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2020-10-29 09:53:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-29 09:53:35,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-29 09:53:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-29 09:53:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-29 09:53:35,568 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2020-10-29 09:53:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:35,569 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-29 09:53:35,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-29 09:53:35,569 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-29 09:53:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-29 09:53:35,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:35,570 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:35,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-29 09:53:35,570 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:35,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:35,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2146484131, now seen corresponding path program 45 times [2020-10-29 09:53:35,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:35,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870059651] [2020-10-29 09:53:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:35,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:37,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:37,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:37,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-29 09:53:37,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:37,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2110 [2020-10-29 09:53:37,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:37,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:37,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-29 09:53:37,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:37,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-29 09:53:37,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:39,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:39,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:39,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:39,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:39,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:39,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:53:39,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:39,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:39,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:39,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:39,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870059651] [2020-10-29 09:53:39,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:39,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-29 09:53:39,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874869698] [2020-10-29 09:53:39,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-29 09:53:39,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:39,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-29 09:53:39,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2020-10-29 09:53:39,964 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 49 states. [2020-10-29 09:53:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:53:47,766 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2020-10-29 09:53:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-29 09:53:47,767 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 104 [2020-10-29 09:53:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:53:47,768 INFO L225 Difference]: With dead ends: 116 [2020-10-29 09:53:47,769 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 09:53:47,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2020-10-29 09:53:47,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 09:53:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-29 09:53:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-29 09:53:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-29 09:53:47,778 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2020-10-29 09:53:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:53:47,778 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-29 09:53:47,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-29 09:53:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-29 09:53:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-29 09:53:47,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:53:47,779 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:53:47,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-29 09:53:47,779 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:53:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:53:47,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1116797440, now seen corresponding path program 46 times [2020-10-29 09:53:47,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:53:47,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833097555] [2020-10-29 09:53:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:53:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:47,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:49,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:50,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:50,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-29 09:53:50,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:53:50,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3056 [2020-10-29 09:53:50,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:50,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:50,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-29 09:53:50,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:53:50,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-29 09:53:50,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:53,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:53:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:53:53,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:53:53,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:53:53,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:53:53,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:53:53,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:53:53,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:53:53,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:53:53,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:53:53,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:53:53,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:53:53,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:53:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:53:53,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833097555] [2020-10-29 09:53:53,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:53:53,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-29 09:53:53,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433501646] [2020-10-29 09:53:53,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-29 09:53:53,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:53:53,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-29 09:53:53,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2020-10-29 09:53:53,222 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 50 states.