/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:50:56,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:50:56,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:50:57,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:50:57,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:50:57,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:50:57,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:50:57,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:50:57,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:50:57,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:50:57,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:50:57,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:50:57,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:50:57,082 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:50:57,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:50:57,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:50:57,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:50:57,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:50:57,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:50:57,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:50:57,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:50:57,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:50:57,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:50:57,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:50:57,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:50:57,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:50:57,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:50:57,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:50:57,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:50:57,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:50:57,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:50:57,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:50:57,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:50:57,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:50:57,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:50:57,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:50:57,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:50:57,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:50:57,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:50:57,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:50:57,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:50:57,168 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 [2020-10-28 08:50:57,226 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:50:57,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:50:57,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:50:57,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:50:57,233 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:50:57,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:50:57,234 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:50:57,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:50:57,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:50:57,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:50:57,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:50:57,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:50:57,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:50:57,238 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:50:57,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:50:57,238 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:50:57,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:50:57,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:50:57,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:50:57,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:50:57,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:50:57,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:50:57,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:50:57,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:50:57,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:50:57,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:50:57,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:50:57,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:50:57,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:50:57,242 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:50:57,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:50:57,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:50:57,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:50:57,798 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:50:57,799 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:50:57,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2020-10-28 08:50:57,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53d75cdc7/beb4109a4821409abfe758c7331bac20/FLAGd7d9d0127 [2020-10-28 08:50:58,589 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:50:58,590 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2020-10-28 08:50:58,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53d75cdc7/beb4109a4821409abfe758c7331bac20/FLAGd7d9d0127 [2020-10-28 08:50:58,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53d75cdc7/beb4109a4821409abfe758c7331bac20 [2020-10-28 08:50:58,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:50:58,952 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:50:58,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:50:58,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:50:58,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:50:58,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:50:58" (1/1) ... [2020-10-28 08:50:58,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@722b5c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:58, skipping insertion in model container [2020-10-28 08:50:58,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:50:58" (1/1) ... [2020-10-28 08:50:58,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:50:58,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:50:59,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:50:59,196 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:50:59,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:50:59,241 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:50:59,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:59 WrapperNode [2020-10-28 08:50:59,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:50:59,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:50:59,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:50:59,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:50:59,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:59" (1/1) ... [2020-10-28 08:50:59,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:59" (1/1) ... [2020-10-28 08:50:59,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:59" (1/1) ... [2020-10-28 08:50:59,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:59" (1/1) ... [2020-10-28 08:50:59,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:59" (1/1) ... [2020-10-28 08:50:59,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:59" (1/1) ... [2020-10-28 08:50:59,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:59" (1/1) ... [2020-10-28 08:50:59,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:50:59,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:50:59,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:50:59,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:50:59,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:59" (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 [2020-10-28 08:50:59,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:50:59,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:50:59,387 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:50:59,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:50:59,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:50:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:50:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:50:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:50:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:50:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:50:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:50:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:50:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:50:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:50:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:50:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:50:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:50:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:50:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:50:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:51:00,007 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:51:00,011 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-28 08:51:00,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:00 BoogieIcfgContainer [2020-10-28 08:51:00,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:51:00,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:51:00,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:51:00,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:51:00,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:50:58" (1/3) ... [2020-10-28 08:51:00,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249a7cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:00, skipping insertion in model container [2020-10-28 08:51:00,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:50:59" (2/3) ... [2020-10-28 08:51:00,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249a7cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:00, skipping insertion in model container [2020-10-28 08:51:00,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:00" (3/3) ... [2020-10-28 08:51:00,029 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2020-10-28 08:51:00,044 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:51:00,050 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:51:00,066 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:51:00,112 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:51:00,112 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:51:00,113 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:51:00,113 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:51:00,113 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:51:00,113 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:51:00,113 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:51:00,113 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:51:00,133 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-28 08:51:00,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 08:51:00,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:00,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:00,146 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:00,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:00,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1497277457, now seen corresponding path program 1 times [2020-10-28 08:51:00,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:00,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232815269] [2020-10-28 08:51:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:00,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:00,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:00,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:00,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 08:51:00,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:00,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-28 08:51:00,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:00,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:00,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:00,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 08:51:00,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:00,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:51:00,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:00,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:00,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:00,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:00,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:00,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 08:51:00,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:00,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:00,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:00,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:00,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:00,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:00,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232815269] [2020-10-28 08:51:00,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:00,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:51:00,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474141863] [2020-10-28 08:51:00,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:51:00,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:00,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:51:00,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:51:00,771 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-28 08:51:00,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:00,886 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2020-10-28 08:51:00,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:51:00,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-28 08:51:00,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:00,896 INFO L225 Difference]: With dead ends: 61 [2020-10-28 08:51:00,897 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 08:51:00,900 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 [2020-10-28 08:51:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 08:51:00,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 08:51:00,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 08:51:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-28 08:51:00,948 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-28 08:51:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:00,949 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-28 08:51:00,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:51:00,949 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-28 08:51:00,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 08:51:00,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:00,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:00,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:51:00,951 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:00,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:00,952 INFO L82 PathProgramCache]: Analyzing trace with hash 947624462, now seen corresponding path program 1 times [2020-10-28 08:51:00,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:00,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335464294] [2020-10-28 08:51:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:00,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:00,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:01,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:01,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 08:51:01,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:01,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-28 08:51:01,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:01,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:01,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:01,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:01,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:01,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:01,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:01,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:01,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:01,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:01,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:01,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:51:01,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:01,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:01,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:01,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:01,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335464294] [2020-10-28 08:51:01,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:01,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:01,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968977266] [2020-10-28 08:51:01,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:01,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:01,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:01,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:01,230 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-10-28 08:51:01,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:01,322 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-28 08:51:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:01,323 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-28 08:51:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:01,324 INFO L225 Difference]: With dead ends: 50 [2020-10-28 08:51:01,325 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 08:51:01,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 08:51:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-28 08:51:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 08:51:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-28 08:51:01,335 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2020-10-28 08:51:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:01,336 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-28 08:51:01,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-28 08:51:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 08:51:01,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:01,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:01,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:51:01,338 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:01,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:01,338 INFO L82 PathProgramCache]: Analyzing trace with hash -196258576, now seen corresponding path program 1 times [2020-10-28 08:51:01,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:01,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208130696] [2020-10-28 08:51:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:01,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:01,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:01,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:01,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 08:51:01,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:01,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-28 08:51:01,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:01,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:01,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:01,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:01,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:51:01,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:01,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:01,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:01,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:01,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:01,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:01,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:51:01,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:01,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:01,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:01,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:01,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:01,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:01,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208130696] [2020-10-28 08:51:01,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:01,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:51:01,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627058231] [2020-10-28 08:51:01,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:01,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:01,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:01,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:01,661 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-10-28 08:51:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:01,798 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-10-28 08:51:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:01,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-28 08:51:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:01,800 INFO L225 Difference]: With dead ends: 52 [2020-10-28 08:51:01,801 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 08:51:01,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 08:51:01,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-28 08:51:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 08:51:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-28 08:51:01,815 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2020-10-28 08:51:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:01,816 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-28 08:51:01,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-28 08:51:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 08:51:01,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:01,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:01,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:51:01,820 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:01,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:01,821 INFO L82 PathProgramCache]: Analyzing trace with hash 43769682, now seen corresponding path program 2 times [2020-10-28 08:51:01,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:01,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682302568] [2020-10-28 08:51:01,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:01,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:01,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:02,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:02,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 08:51:02,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:02,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-28 08:51:02,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:02,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:02,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:02,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:02,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:02,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:02,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:02,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:02,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:02,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:02,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:02,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:51:02,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:02,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:02,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:02,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:02,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:02,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:02,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682302568] [2020-10-28 08:51:02,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:02,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:02,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797366682] [2020-10-28 08:51:02,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:02,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:02,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:02,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:02,201 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2020-10-28 08:51:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:02,285 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-10-28 08:51:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:02,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-28 08:51:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:02,286 INFO L225 Difference]: With dead ends: 50 [2020-10-28 08:51:02,287 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 08:51:02,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:02,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 08:51:02,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-28 08:51:02,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 08:51:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-10-28 08:51:02,295 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2020-10-28 08:51:02,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:02,295 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-10-28 08:51:02,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:02,296 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-10-28 08:51:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 08:51:02,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:02,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:02,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:51:02,297 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:02,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2128152409, now seen corresponding path program 1 times [2020-10-28 08:51:02,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:02,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743638257] [2020-10-28 08:51:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:02,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:02,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:02,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:02,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 08:51:02,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:02,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-28 08:51:02,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:02,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:02,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:02,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 08:51:02,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:02,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:02,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:02,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:02,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:02,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:02,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:02,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:51:02,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:02,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:02,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:02,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:02,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743638257] [2020-10-28 08:51:02,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:02,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:02,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812790135] [2020-10-28 08:51:02,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:02,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:02,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:02,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:02,580 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 4 states. [2020-10-28 08:51:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:02,675 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2020-10-28 08:51:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:02,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-28 08:51:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:02,676 INFO L225 Difference]: With dead ends: 62 [2020-10-28 08:51:02,676 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 08:51:02,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 08:51:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-10-28 08:51:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 08:51:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-28 08:51:02,686 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2020-10-28 08:51:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:02,686 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-28 08:51:02,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:02,686 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-28 08:51:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 08:51:02,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:02,688 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:02,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:51:02,688 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:02,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1601289516, now seen corresponding path program 1 times [2020-10-28 08:51:02,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:02,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922434544] [2020-10-28 08:51:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:02,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:02,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:02,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:02,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 08:51:02,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:02,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-28 08:51:02,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:02,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:02,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:02,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:02,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:02,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:03,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:03,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:03,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:03,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:03,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:03,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:03,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:03,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:03,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:03,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:03,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 08:51:03,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922434544] [2020-10-28 08:51:03,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:03,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:03,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5933197] [2020-10-28 08:51:03,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:03,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:03,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:03,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:03,057 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 6 states. [2020-10-28 08:51:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:03,160 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-10-28 08:51:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:03,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-28 08:51:03,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:03,162 INFO L225 Difference]: With dead ends: 64 [2020-10-28 08:51:03,162 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 08:51:03,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:03,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 08:51:03,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-28 08:51:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 08:51:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-28 08:51:03,175 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 27 [2020-10-28 08:51:03,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:03,176 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-28 08:51:03,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:03,180 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-28 08:51:03,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:51:03,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:03,182 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:03,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:51:03,183 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:03,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:03,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1528584654, now seen corresponding path program 2 times [2020-10-28 08:51:03,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:03,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199831532] [2020-10-28 08:51:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:03,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:03,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:51:03,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:03,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-28 08:51:03,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:03,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 08:51:03,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 08:51:03,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:03,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:03,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:03,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:03,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:03,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:51:03,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:03,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:03,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:03,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:03,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:03,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 08:51:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:51:03,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199831532] [2020-10-28 08:51:03,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:03,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:51:03,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232625668] [2020-10-28 08:51:03,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:03,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:03,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:03,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:03,734 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 5 states. [2020-10-28 08:51:03,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:03,834 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2020-10-28 08:51:03,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:03,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-28 08:51:03,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:03,835 INFO L225 Difference]: With dead ends: 71 [2020-10-28 08:51:03,835 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 08:51:03,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 08:51:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-10-28 08:51:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 08:51:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-28 08:51:03,851 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 29 [2020-10-28 08:51:03,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:03,852 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-28 08:51:03,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:03,852 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-28 08:51:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 08:51:03,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:03,853 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:03,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:51:03,854 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1904637605, now seen corresponding path program 3 times [2020-10-28 08:51:03,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:03,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469404001] [2020-10-28 08:51:03,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:03,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:03,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:04,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:04,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 08:51:04,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:04,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-28 08:51:04,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:04,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:04,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:04,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:04,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:51:04,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:04,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:04,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:04,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:04,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:04,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:04,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:04,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:04,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:04,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:04,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:04,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:04,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 08:51:04,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469404001] [2020-10-28 08:51:04,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:04,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:04,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930926469] [2020-10-28 08:51:04,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:04,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:04,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:04,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:04,495 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 7 states. [2020-10-28 08:51:04,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:04,621 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2020-10-28 08:51:04,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:51:04,622 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-28 08:51:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:04,623 INFO L225 Difference]: With dead ends: 76 [2020-10-28 08:51:04,624 INFO L226 Difference]: Without dead ends: 46 [2020-10-28 08:51:04,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-28 08:51:04,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-28 08:51:04,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 08:51:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-10-28 08:51:04,647 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 32 [2020-10-28 08:51:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:04,647 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-10-28 08:51:04,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-10-28 08:51:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 08:51:04,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:04,650 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:04,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:51:04,650 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:04,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:04,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2022600515, now seen corresponding path program 4 times [2020-10-28 08:51:04,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:04,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64495707] [2020-10-28 08:51:04,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:04,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:04,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:05,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 08:51:05,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:05,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-10-28 08:51:05,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:05,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:05,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:05,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:05,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:51:05,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:05,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:05,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:05,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:05,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:05,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:05,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:05,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:05,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:05,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:05,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:05,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 08:51:05,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64495707] [2020-10-28 08:51:05,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:05,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:05,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795762673] [2020-10-28 08:51:05,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:05,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:05,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:05,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:05,536 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 8 states. [2020-10-28 08:51:05,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:05,629 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-10-28 08:51:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:05,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-28 08:51:05,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:05,631 INFO L225 Difference]: With dead ends: 78 [2020-10-28 08:51:05,631 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 08:51:05,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:05,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 08:51:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-28 08:51:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 08:51:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-28 08:51:05,638 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 34 [2020-10-28 08:51:05,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:05,638 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-28 08:51:05,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:05,638 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-28 08:51:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 08:51:05,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:05,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:05,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:51:05,640 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:05,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:05,640 INFO L82 PathProgramCache]: Analyzing trace with hash 579159967, now seen corresponding path program 5 times [2020-10-28 08:51:05,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:05,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285033048] [2020-10-28 08:51:05,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:05,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:05,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:06,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 08:51:06,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:06,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-10-28 08:51:06,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:06,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:06,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:06,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 08:51:06,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:51:06,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:06,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:06,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:06,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:06,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:06,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:06,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:06,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:06,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:06,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:06,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:06,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:51:06,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285033048] [2020-10-28 08:51:06,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:06,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:06,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040864266] [2020-10-28 08:51:06,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:06,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:06,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:06,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:06,573 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-10-28 08:51:06,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:06,690 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2020-10-28 08:51:06,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:06,691 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-28 08:51:06,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:06,692 INFO L225 Difference]: With dead ends: 86 [2020-10-28 08:51:06,692 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 08:51:06,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 08:51:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-28 08:51:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 08:51:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-10-28 08:51:06,699 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 36 [2020-10-28 08:51:06,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:06,700 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-10-28 08:51:06,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-10-28 08:51:06,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 08:51:06,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:06,701 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:06,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:51:06,702 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:06,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:06,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1788466382, now seen corresponding path program 6 times [2020-10-28 08:51:06,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:06,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958190080] [2020-10-28 08:51:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:06,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:06,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:08,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 08:51:08,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:08,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1420 [2020-10-28 08:51:08,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:08,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:08,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:51:08,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:08,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:51:08,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:08,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:08,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:08,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:08,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:08,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:51:08,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:08,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:08,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:08,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:08,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:08,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 08:51:08,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958190080] [2020-10-28 08:51:08,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:08,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:51:08,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162345313] [2020-10-28 08:51:08,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:51:08,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:08,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:51:08,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:08,280 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 9 states. [2020-10-28 08:51:08,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:08,412 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-10-28 08:51:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:51:08,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-28 08:51:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:08,414 INFO L225 Difference]: With dead ends: 92 [2020-10-28 08:51:08,414 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 08:51:08,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 08:51:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-28 08:51:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 08:51:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-28 08:51:08,423 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 39 [2020-10-28 08:51:08,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:08,424 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-28 08:51:08,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:51:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-28 08:51:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 08:51:08,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:08,427 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:08,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:51:08,428 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:08,428 INFO L82 PathProgramCache]: Analyzing trace with hash -686875860, now seen corresponding path program 7 times [2020-10-28 08:51:08,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:08,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271386066] [2020-10-28 08:51:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:08,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:08,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:10,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 08:51:10,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:10,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1602 [2020-10-28 08:51:10,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:10,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:10,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:51:10,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:10,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:51:10,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:10,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:10,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:10,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:10,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:10,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:10,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:10,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:10,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:10,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:10,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:10,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 08:51:10,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271386066] [2020-10-28 08:51:10,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:10,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:51:10,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629207327] [2020-10-28 08:51:10,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:51:10,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:10,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:51:10,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:10,181 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 10 states. [2020-10-28 08:51:10,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:10,301 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-10-28 08:51:10,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:51:10,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-28 08:51:10,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:10,302 INFO L225 Difference]: With dead ends: 94 [2020-10-28 08:51:10,302 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 08:51:10,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:10,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 08:51:10,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-28 08:51:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 08:51:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-10-28 08:51:10,309 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 41 [2020-10-28 08:51:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:10,309 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-10-28 08:51:10,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:51:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-10-28 08:51:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 08:51:10,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:10,310 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:10,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:51:10,310 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:10,311 INFO L82 PathProgramCache]: Analyzing trace with hash -78888438, now seen corresponding path program 8 times [2020-10-28 08:51:10,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:10,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575906027] [2020-10-28 08:51:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:10,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:10,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:11,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:11,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 08:51:11,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:11,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1664 [2020-10-28 08:51:11,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:11,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:11,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:11,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 08:51:11,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 08:51:11,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:12,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:12,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:12,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:12,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:12,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:12,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:12,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:12,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:12,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:12,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:12,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:12,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 08:51:12,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575906027] [2020-10-28 08:51:12,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:12,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:12,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250588231] [2020-10-28 08:51:12,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:12,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:12,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:12,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:12,116 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 7 states. [2020-10-28 08:51:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:12,230 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2020-10-28 08:51:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:51:12,230 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-28 08:51:12,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:12,231 INFO L225 Difference]: With dead ends: 102 [2020-10-28 08:51:12,232 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 08:51:12,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 08:51:12,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-10-28 08:51:12,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 08:51:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-10-28 08:51:12,251 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 43 [2020-10-28 08:51:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:12,251 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-10-28 08:51:12,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-10-28 08:51:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 08:51:12,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:12,253 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:12,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:51:12,257 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:12,258 INFO L82 PathProgramCache]: Analyzing trace with hash 99171971, now seen corresponding path program 9 times [2020-10-28 08:51:12,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:12,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585392662] [2020-10-28 08:51:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:12,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:12,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:14,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 08:51:14,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:14,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2161 [2020-10-28 08:51:14,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:14,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:14,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:51:14,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:14,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:51:14,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:14,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:14,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:14,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:14,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:14,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:14,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:14,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:14,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:14,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:14,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-28 08:51:14,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585392662] [2020-10-28 08:51:14,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:14,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:51:14,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679594765] [2020-10-28 08:51:14,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:51:14,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:14,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:51:14,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:51:14,560 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 11 states. [2020-10-28 08:51:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:14,677 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2020-10-28 08:51:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:51:14,677 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-28 08:51:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:14,678 INFO L225 Difference]: With dead ends: 108 [2020-10-28 08:51:14,679 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 08:51:14,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:51:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 08:51:14,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-28 08:51:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 08:51:14,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-10-28 08:51:14,693 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 46 [2020-10-28 08:51:14,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:14,696 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-10-28 08:51:14,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:51:14,696 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-10-28 08:51:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 08:51:14,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:14,697 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:14,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:51:14,697 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:14,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1388819045, now seen corresponding path program 10 times [2020-10-28 08:51:14,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:14,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881474724] [2020-10-28 08:51:14,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:14,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:14,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:17,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 08:51:17,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:17,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2331 [2020-10-28 08:51:17,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:17,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 08:51:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:51:17,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:17,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:17,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:17,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:17,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:17,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:17,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:17,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:17,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:17,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:17,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:17,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 08:51:17,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881474724] [2020-10-28 08:51:17,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:17,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:17,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385094580] [2020-10-28 08:51:17,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:17,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:17,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:17,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:17,149 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 8 states. [2020-10-28 08:51:17,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:17,269 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2020-10-28 08:51:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:17,270 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-10-28 08:51:17,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:17,271 INFO L225 Difference]: With dead ends: 116 [2020-10-28 08:51:17,271 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 08:51:17,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:17,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 08:51:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2020-10-28 08:51:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 08:51:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2020-10-28 08:51:17,281 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 48 [2020-10-28 08:51:17,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:17,282 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2020-10-28 08:51:17,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2020-10-28 08:51:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 08:51:17,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:17,284 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:17,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:51:17,284 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1805724744, now seen corresponding path program 11 times [2020-10-28 08:51:17,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:17,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408802317] [2020-10-28 08:51:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:17,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:20,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 08:51:20,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:20,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3195 [2020-10-28 08:51:20,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:20,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:20,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:51:20,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:20,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:51:20,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:20,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:20,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:20,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:20,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:20,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:20,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:20,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:20,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:20,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:20,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:20,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 08:51:20,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408802317] [2020-10-28 08:51:20,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:20,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:51:20,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655467959] [2020-10-28 08:51:20,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:51:20,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:20,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:51:20,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:51:20,648 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand 12 states. [2020-10-28 08:51:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:20,806 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2020-10-28 08:51:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:51:20,807 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-28 08:51:20,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:20,808 INFO L225 Difference]: With dead ends: 122 [2020-10-28 08:51:20,808 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 08:51:20,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:51:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 08:51:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-28 08:51:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 08:51:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2020-10-28 08:51:20,815 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 51 [2020-10-28 08:51:20,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:20,816 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2020-10-28 08:51:20,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:51:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2020-10-28 08:51:20,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 08:51:20,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:20,817 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:20,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:51:20,817 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:20,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:20,818 INFO L82 PathProgramCache]: Analyzing trace with hash 947508646, now seen corresponding path program 12 times [2020-10-28 08:51:20,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:20,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750226341] [2020-10-28 08:51:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:20,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:24,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 08:51:24,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:24,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3298 [2020-10-28 08:51:24,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:24,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:24,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:51:24,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:24,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:51:24,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:24,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:24,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:24,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:24,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:24,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:24,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:24,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:24,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:24,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:24,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:24,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 08:51:24,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750226341] [2020-10-28 08:51:24,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:24,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:51:24,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844142234] [2020-10-28 08:51:24,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:51:24,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:24,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:51:24,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:51:24,310 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 13 states. [2020-10-28 08:51:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:24,449 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2020-10-28 08:51:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:51:24,450 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-10-28 08:51:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:24,451 INFO L225 Difference]: With dead ends: 124 [2020-10-28 08:51:24,451 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 08:51:24,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:51:24,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 08:51:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-28 08:51:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 08:51:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2020-10-28 08:51:24,461 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 53 [2020-10-28 08:51:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:24,462 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2020-10-28 08:51:24,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:51:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2020-10-28 08:51:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:51:24,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:24,464 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:24,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:51:24,464 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:24,465 INFO L82 PathProgramCache]: Analyzing trace with hash 835559300, now seen corresponding path program 13 times [2020-10-28 08:51:24,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:24,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956068000] [2020-10-28 08:51:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:24,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:24,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:27,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:27,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:51:27,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:27,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3395 [2020-10-28 08:51:27,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:27,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:27,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:51:27,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 08:51:27,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 08:51:27,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:27,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:27,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:27,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:27,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:27,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:27,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 08:51:27,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:27,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:27,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:27,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:27,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:27,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 08:51:27,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956068000] [2020-10-28 08:51:27,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:27,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:51:27,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741985890] [2020-10-28 08:51:27,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:51:27,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:27,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:51:27,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:27,993 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 9 states. [2020-10-28 08:51:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:28,091 INFO L93 Difference]: Finished difference Result 132 states and 165 transitions. [2020-10-28 08:51:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:51:28,091 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-28 08:51:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:28,092 INFO L225 Difference]: With dead ends: 132 [2020-10-28 08:51:28,093 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 08:51:28,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 08:51:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-10-28 08:51:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 08:51:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2020-10-28 08:51:28,098 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 55 [2020-10-28 08:51:28,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:28,098 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2020-10-28 08:51:28,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:51:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2020-10-28 08:51:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 08:51:28,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:28,099 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:28,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:51:28,099 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:28,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:28,100 INFO L82 PathProgramCache]: Analyzing trace with hash -565823799, now seen corresponding path program 14 times [2020-10-28 08:51:28,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:28,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588575509] [2020-10-28 08:51:28,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:28,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:28,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:32,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:32,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 08:51:32,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:32,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4086 [2020-10-28 08:51:32,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:32,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:32,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:51:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:51:32,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:51:32,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:32,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:32,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:32,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:32,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:32,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:32,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:32,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:32,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:32,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:32,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:32,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-28 08:51:32,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588575509] [2020-10-28 08:51:32,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:32,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:51:32,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888609883] [2020-10-28 08:51:32,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:51:32,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:32,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:51:32,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:51:32,405 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand 14 states. [2020-10-28 08:51:32,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:32,551 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2020-10-28 08:51:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:51:32,552 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-10-28 08:51:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:32,553 INFO L225 Difference]: With dead ends: 138 [2020-10-28 08:51:32,553 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 08:51:32,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:51:32,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 08:51:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-28 08:51:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 08:51:32,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-10-28 08:51:32,567 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 58 [2020-10-28 08:51:32,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:32,567 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-10-28 08:51:32,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:51:32,567 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-10-28 08:51:32,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 08:51:32,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:32,568 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:32,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:51:32,569 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:32,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:32,569 INFO L82 PathProgramCache]: Analyzing trace with hash 968615851, now seen corresponding path program 15 times [2020-10-28 08:51:32,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:32,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567843503] [2020-10-28 08:51:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:32,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:32,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:36,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 08:51:36,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:36,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3539 [2020-10-28 08:51:36,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:36,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:36,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:51:36,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 08:51:36,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:51:36,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:36,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:36,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:36,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:36,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:36,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:36,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:36,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:36,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:36,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:36,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:36,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 08:51:36,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567843503] [2020-10-28 08:51:36,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:36,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:51:36,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553237788] [2020-10-28 08:51:36,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:51:36,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:36,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:51:36,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:36,243 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 10 states. [2020-10-28 08:51:36,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:36,419 INFO L93 Difference]: Finished difference Result 146 states and 183 transitions. [2020-10-28 08:51:36,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:51:36,420 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-28 08:51:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:36,421 INFO L225 Difference]: With dead ends: 146 [2020-10-28 08:51:36,422 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 08:51:36,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 08:51:36,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-10-28 08:51:36,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 08:51:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2020-10-28 08:51:36,429 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 60 [2020-10-28 08:51:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:36,429 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2020-10-28 08:51:36,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:51:36,430 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2020-10-28 08:51:36,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:51:36,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:36,440 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:36,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:51:36,440 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:36,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:36,441 INFO L82 PathProgramCache]: Analyzing trace with hash -932927166, now seen corresponding path program 16 times [2020-10-28 08:51:36,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:36,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413959118] [2020-10-28 08:51:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:36,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:40,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:40,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:51:40,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:40,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4453 [2020-10-28 08:51:40,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:40,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:40,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:51:40,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:40,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:51:40,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:41,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:41,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:41,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:41,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:41,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:41,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:41,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:41,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:41,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:41,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:41,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-28 08:51:41,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413959118] [2020-10-28 08:51:41,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:41,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:51:41,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334176541] [2020-10-28 08:51:41,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:51:41,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:41,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:51:41,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:51:41,130 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand 15 states. [2020-10-28 08:51:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:41,297 INFO L93 Difference]: Finished difference Result 152 states and 188 transitions. [2020-10-28 08:51:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:51:41,297 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-10-28 08:51:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:41,298 INFO L225 Difference]: With dead ends: 152 [2020-10-28 08:51:41,298 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 08:51:41,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:51:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 08:51:41,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-28 08:51:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 08:51:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2020-10-28 08:51:41,306 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 63 [2020-10-28 08:51:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:41,306 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2020-10-28 08:51:41,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:51:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2020-10-28 08:51:41,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 08:51:41,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:41,308 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:41,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:51:41,309 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:41,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:41,309 INFO L82 PathProgramCache]: Analyzing trace with hash 614741408, now seen corresponding path program 17 times [2020-10-28 08:51:41,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:41,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949951860] [2020-10-28 08:51:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:41,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:45,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 08:51:45,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:45,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4588 [2020-10-28 08:51:45,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:45,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:45,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:51:45,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:45,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:51:45,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:46,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:46,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:46,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:46,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:46,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:46,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:46,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:46,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:46,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:46,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:46,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-28 08:51:46,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949951860] [2020-10-28 08:51:46,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:46,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:51:46,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898983523] [2020-10-28 08:51:46,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:51:46,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:46,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:51:46,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:51:46,164 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 16 states. [2020-10-28 08:51:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:46,344 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2020-10-28 08:51:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:51:46,347 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2020-10-28 08:51:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:46,348 INFO L225 Difference]: With dead ends: 154 [2020-10-28 08:51:46,349 INFO L226 Difference]: Without dead ends: 94 [2020-10-28 08:51:46,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:51:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-28 08:51:46,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-28 08:51:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 08:51:46,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2020-10-28 08:51:46,356 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 65 [2020-10-28 08:51:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:46,357 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2020-10-28 08:51:46,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:51:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2020-10-28 08:51:46,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 08:51:46,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:46,363 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:46,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:51:46,364 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:46,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:46,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1865556606, now seen corresponding path program 18 times [2020-10-28 08:51:46,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:46,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324148792] [2020-10-28 08:51:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:46,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:46,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:51,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:51,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 08:51:51,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:51,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:51:51,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:51,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:51,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:51:51,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 08:51:51,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 08:51:51,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:51,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:51,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:51,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:51,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:51,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:51,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:51:51,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:51,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:51,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:51,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:51,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:51,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 08:51:51,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324148792] [2020-10-28 08:51:51,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:51,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:51:51,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688121927] [2020-10-28 08:51:51,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:51:51,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:51,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:51:51,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:51:51,523 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand 11 states. [2020-10-28 08:51:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:51,680 INFO L93 Difference]: Finished difference Result 162 states and 203 transitions. [2020-10-28 08:51:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:51:51,681 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-28 08:51:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:51,682 INFO L225 Difference]: With dead ends: 162 [2020-10-28 08:51:51,682 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 08:51:51,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:51:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 08:51:51,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-10-28 08:51:51,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-28 08:51:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 119 transitions. [2020-10-28 08:51:51,688 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 119 transitions. Word has length 67 [2020-10-28 08:51:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:51,688 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 119 transitions. [2020-10-28 08:51:51,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:51:51,689 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 119 transitions. [2020-10-28 08:51:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 08:51:51,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:51,690 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:51,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:51:51,690 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:51,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:51,690 INFO L82 PathProgramCache]: Analyzing trace with hash 837556623, now seen corresponding path program 19 times [2020-10-28 08:51:51,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:51,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900103643] [2020-10-28 08:51:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:51,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:51,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:56,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:56,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 08:51:56,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:56,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:51:56,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:56,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:51:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:56,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:51:56,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:56,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:56,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:56,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:56,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:56,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:56,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:56,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:56,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:56,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:56,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:56,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:56,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-28 08:51:56,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900103643] [2020-10-28 08:51:56,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:56,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:51:56,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860690236] [2020-10-28 08:51:56,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:51:56,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:56,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:51:56,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:51:56,944 INFO L87 Difference]: Start difference. First operand 99 states and 119 transitions. Second operand 17 states. [2020-10-28 08:51:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:57,127 INFO L93 Difference]: Finished difference Result 168 states and 208 transitions. [2020-10-28 08:51:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:51:57,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-10-28 08:51:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:57,128 INFO L225 Difference]: With dead ends: 168 [2020-10-28 08:51:57,128 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 08:51:57,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:51:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 08:51:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-28 08:51:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 08:51:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2020-10-28 08:51:57,139 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 70 [2020-10-28 08:51:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:57,139 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2020-10-28 08:51:57,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:51:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2020-10-28 08:51:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 08:51:57,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:57,141 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:57,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:51:57,143 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:57,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1442478223, now seen corresponding path program 20 times [2020-10-28 08:51:57,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:57,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583890907] [2020-10-28 08:51:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:57,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:57,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:02,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 08:52:02,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:02,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:52:02,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:02,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:02,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:52:02,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:02,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:52:02,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:02,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:02,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:02,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:02,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:02,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:02,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:02,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:02,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:02,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:02,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:02,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-28 08:52:02,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583890907] [2020-10-28 08:52:02,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:02,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:52:02,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534232192] [2020-10-28 08:52:02,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:52:02,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:02,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:52:02,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:52:02,446 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand 18 states. [2020-10-28 08:52:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:02,700 INFO L93 Difference]: Finished difference Result 170 states and 210 transitions. [2020-10-28 08:52:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:52:02,701 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-10-28 08:52:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:02,702 INFO L225 Difference]: With dead ends: 170 [2020-10-28 08:52:02,702 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 08:52:02,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:52:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 08:52:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-28 08:52:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 08:52:02,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2020-10-28 08:52:02,716 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 72 [2020-10-28 08:52:02,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:02,716 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2020-10-28 08:52:02,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:52:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2020-10-28 08:52:02,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 08:52:02,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:02,717 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:02,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:52:02,718 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:02,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2122644269, now seen corresponding path program 21 times [2020-10-28 08:52:02,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:02,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153114147] [2020-10-28 08:52:02,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:02,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:02,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:07,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:07,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 08:52:07,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:07,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 08:52:07,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:07,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:07,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:52:07,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 08:52:07,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:52:07,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:07,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:07,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:07,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:07,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:07,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:07,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:07,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:07,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:07,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:07,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:07,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:07,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 08:52:07,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153114147] [2020-10-28 08:52:07,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:07,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:52:07,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541044545] [2020-10-28 08:52:07,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:52:07,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:07,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:52:07,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:52:07,893 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand 12 states. [2020-10-28 08:52:08,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:08,017 INFO L93 Difference]: Finished difference Result 178 states and 223 transitions. [2020-10-28 08:52:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:52:08,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-10-28 08:52:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:08,019 INFO L225 Difference]: With dead ends: 178 [2020-10-28 08:52:08,019 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 08:52:08,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:52:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 08:52:08,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2020-10-28 08:52:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 08:52:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2020-10-28 08:52:08,025 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 74 [2020-10-28 08:52:08,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:08,025 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2020-10-28 08:52:08,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:52:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2020-10-28 08:52:08,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 08:52:08,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:08,026 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:08,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:52:08,027 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:08,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:08,027 INFO L82 PathProgramCache]: Analyzing trace with hash 25598746, now seen corresponding path program 22 times [2020-10-28 08:52:08,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:08,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310662914] [2020-10-28 08:52:08,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:08,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:08,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:13,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:13,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 08:52:13,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:13,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:52:13,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:13,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:13,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:52:13,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:13,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:52:13,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:13,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:13,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:13,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:13,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:13,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:13,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:13,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:13,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:13,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:13,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:13,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:13,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-28 08:52:13,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310662914] [2020-10-28 08:52:13,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:13,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:52:13,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000039364] [2020-10-28 08:52:13,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:52:13,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:13,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:52:13,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:52:13,345 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand 19 states. [2020-10-28 08:52:13,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:13,577 INFO L93 Difference]: Finished difference Result 184 states and 228 transitions. [2020-10-28 08:52:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:52:13,577 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2020-10-28 08:52:13,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:13,579 INFO L225 Difference]: With dead ends: 184 [2020-10-28 08:52:13,579 INFO L226 Difference]: Without dead ends: 112 [2020-10-28 08:52:13,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:52:13,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-28 08:52:13,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-28 08:52:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-28 08:52:13,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2020-10-28 08:52:13,586 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 77 [2020-10-28 08:52:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:13,587 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2020-10-28 08:52:13,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:52:13,587 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2020-10-28 08:52:13,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:52:13,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:13,594 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:13,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:52:13,594 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:13,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:13,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2144195848, now seen corresponding path program 23 times [2020-10-28 08:52:13,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:13,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150048742] [2020-10-28 08:52:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:13,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:13,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:18,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:52:18,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:18,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:52:18,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:18,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:18,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:52:18,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 08:52:18,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 08:52:18,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:18,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:18,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:18,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:18,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:18,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:18,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:18,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:18,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:18,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:18,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-28 08:52:18,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150048742] [2020-10-28 08:52:18,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:18,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:52:18,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115869860] [2020-10-28 08:52:18,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:52:18,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:18,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:52:18,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:18,793 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand 13 states. [2020-10-28 08:52:19,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:19,020 INFO L93 Difference]: Finished difference Result 192 states and 241 transitions. [2020-10-28 08:52:19,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:52:19,020 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-10-28 08:52:19,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:19,021 INFO L225 Difference]: With dead ends: 192 [2020-10-28 08:52:19,021 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 08:52:19,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:19,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 08:52:19,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2020-10-28 08:52:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 08:52:19,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2020-10-28 08:52:19,028 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 79 [2020-10-28 08:52:19,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:19,028 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2020-10-28 08:52:19,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:52:19,029 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2020-10-28 08:52:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 08:52:19,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:19,030 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:19,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:52:19,030 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:19,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:19,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2067364139, now seen corresponding path program 24 times [2020-10-28 08:52:19,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:19,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145011263] [2020-10-28 08:52:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:19,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:19,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:24,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:24,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 08:52:24,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:24,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:52:24,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:24,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:24,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:52:24,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:24,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:52:24,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:24,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:24,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:24,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:24,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:24,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:24,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:24,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:24,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:24,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:24,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:24,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:24,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-28 08:52:24,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145011263] [2020-10-28 08:52:24,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:24,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:52:24,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119951536] [2020-10-28 08:52:24,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:52:24,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:24,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:52:24,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:52:24,365 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 20 states. [2020-10-28 08:52:24,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:24,605 INFO L93 Difference]: Finished difference Result 198 states and 246 transitions. [2020-10-28 08:52:24,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:52:24,605 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 82 [2020-10-28 08:52:24,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:24,607 INFO L225 Difference]: With dead ends: 198 [2020-10-28 08:52:24,607 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 08:52:24,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:52:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 08:52:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-28 08:52:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 08:52:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 143 transitions. [2020-10-28 08:52:24,624 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 143 transitions. Word has length 82 [2020-10-28 08:52:24,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:24,624 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 143 transitions. [2020-10-28 08:52:24,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:52:24,624 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 143 transitions. [2020-10-28 08:52:24,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 08:52:24,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:24,628 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:24,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:52:24,628 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash -120573513, now seen corresponding path program 25 times [2020-10-28 08:52:24,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:24,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141256518] [2020-10-28 08:52:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:24,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:24,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:29,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:29,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 08:52:29,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:29,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:52:29,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:29,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:29,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:52:29,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:29,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:52:29,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:30,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:30,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:30,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:30,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:30,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:30,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:30,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:30,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:30,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:30,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-28 08:52:30,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141256518] [2020-10-28 08:52:30,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:30,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:52:30,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889499718] [2020-10-28 08:52:30,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:52:30,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:30,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:52:30,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:52:30,022 INFO L87 Difference]: Start difference. First operand 119 states and 143 transitions. Second operand 21 states. [2020-10-28 08:52:30,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:30,242 INFO L93 Difference]: Finished difference Result 200 states and 248 transitions. [2020-10-28 08:52:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:52:30,243 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-10-28 08:52:30,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:30,244 INFO L225 Difference]: With dead ends: 200 [2020-10-28 08:52:30,244 INFO L226 Difference]: Without dead ends: 122 [2020-10-28 08:52:30,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:52:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-28 08:52:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-28 08:52:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 08:52:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2020-10-28 08:52:30,255 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 84 [2020-10-28 08:52:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:30,255 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2020-10-28 08:52:30,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:52:30,256 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2020-10-28 08:52:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 08:52:30,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:30,257 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:30,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:52:30,257 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:30,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1860522983, now seen corresponding path program 26 times [2020-10-28 08:52:30,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:30,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138396892] [2020-10-28 08:52:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:30,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:30,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:35,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:35,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 08:52:35,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:35,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:52:35,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:35,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:35,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:52:35,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 08:52:35,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:52:35,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:35,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:35,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:35,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:35,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:35,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:35,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:35,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:35,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:35,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:35,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:35,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:35,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-28 08:52:35,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138396892] [2020-10-28 08:52:35,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:35,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:52:35,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074055536] [2020-10-28 08:52:35,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:52:35,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:35,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:52:35,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:52:35,468 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand 14 states. [2020-10-28 08:52:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:35,642 INFO L93 Difference]: Finished difference Result 208 states and 261 transitions. [2020-10-28 08:52:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:52:35,643 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 86 [2020-10-28 08:52:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:35,644 INFO L225 Difference]: With dead ends: 208 [2020-10-28 08:52:35,644 INFO L226 Difference]: Without dead ends: 131 [2020-10-28 08:52:35,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:52:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-28 08:52:35,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2020-10-28 08:52:35,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 08:52:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2020-10-28 08:52:35,653 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 86 [2020-10-28 08:52:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:35,653 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2020-10-28 08:52:35,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:52:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2020-10-28 08:52:35,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 08:52:35,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:35,654 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:35,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:52:35,655 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:35,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:35,656 INFO L82 PathProgramCache]: Analyzing trace with hash 630285844, now seen corresponding path program 27 times [2020-10-28 08:52:35,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:35,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244116865] [2020-10-28 08:52:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:35,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:35,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:40,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:40,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 08:52:40,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:40,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:52:40,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:40,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:40,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:52:40,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:40,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:52:40,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:41,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:41,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:41,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:41,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:41,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:41,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:41,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:41,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:41,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:41,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:41,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:41,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-10-28 08:52:41,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244116865] [2020-10-28 08:52:41,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:41,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:52:41,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701204253] [2020-10-28 08:52:41,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:52:41,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:41,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:52:41,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:52:41,052 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand 22 states. [2020-10-28 08:52:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:41,274 INFO L93 Difference]: Finished difference Result 214 states and 266 transitions. [2020-10-28 08:52:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:52:41,274 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2020-10-28 08:52:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:41,276 INFO L225 Difference]: With dead ends: 214 [2020-10-28 08:52:41,276 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 08:52:41,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:52:41,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 08:52:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-28 08:52:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-28 08:52:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2020-10-28 08:52:41,289 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 89 [2020-10-28 08:52:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:41,290 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2020-10-28 08:52:41,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:52:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2020-10-28 08:52:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 08:52:41,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:41,295 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:41,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:52:41,298 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:41,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:41,299 INFO L82 PathProgramCache]: Analyzing trace with hash 33429746, now seen corresponding path program 28 times [2020-10-28 08:52:41,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:41,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358324594] [2020-10-28 08:52:41,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:41,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:41,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:46,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:46,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:52:46,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:46,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 08:52:46,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:46,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:52:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 08:52:46,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 08:52:46,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:46,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:46,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:46,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:46,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:46,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:46,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:46,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:46,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:46,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:46,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-28 08:52:46,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358324594] [2020-10-28 08:52:46,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:46,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:52:46,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407758886] [2020-10-28 08:52:46,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:52:46,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:46,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:52:46,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:52:46,521 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand 15 states. [2020-10-28 08:52:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:46,760 INFO L93 Difference]: Finished difference Result 222 states and 279 transitions. [2020-10-28 08:52:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:52:46,760 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 91 [2020-10-28 08:52:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:46,761 INFO L225 Difference]: With dead ends: 222 [2020-10-28 08:52:46,762 INFO L226 Difference]: Without dead ends: 139 [2020-10-28 08:52:46,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:52:46,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-28 08:52:46,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2020-10-28 08:52:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-28 08:52:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2020-10-28 08:52:46,772 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 91 [2020-10-28 08:52:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:46,772 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2020-10-28 08:52:46,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:52:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2020-10-28 08:52:46,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 08:52:46,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:46,774 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:46,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:52:46,774 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:46,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:46,774 INFO L82 PathProgramCache]: Analyzing trace with hash 390667931, now seen corresponding path program 29 times [2020-10-28 08:52:46,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:46,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996757593] [2020-10-28 08:52:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:46,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:46,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:51,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:51,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-28 08:52:51,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:51,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 08:52:51,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:51,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:51,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:52:51,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:51,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:52:51,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:52,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:52,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:52,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:52,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:52,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:52,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:52,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:52,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:52,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:52,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:52,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:52,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-10-28 08:52:52,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996757593] [2020-10-28 08:52:52,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:52,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:52:52,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637700987] [2020-10-28 08:52:52,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:52:52,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:52,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:52:52,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:52:52,223 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand 23 states. [2020-10-28 08:52:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:52,376 INFO L93 Difference]: Finished difference Result 228 states and 284 transitions. [2020-10-28 08:52:52,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:52:52,377 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 94 [2020-10-28 08:52:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:52,379 INFO L225 Difference]: With dead ends: 228 [2020-10-28 08:52:52,379 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 08:52:52,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:52:52,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 08:52:52,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-28 08:52:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 08:52:52,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 165 transitions. [2020-10-28 08:52:52,387 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 165 transitions. Word has length 94 [2020-10-28 08:52:52,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:52,387 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 165 transitions. [2020-10-28 08:52:52,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:52:52,388 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 165 transitions. [2020-10-28 08:52:52,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 08:52:52,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:52,389 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:52,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:52:52,389 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:52,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:52,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1473218173, now seen corresponding path program 30 times [2020-10-28 08:52:52,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:52,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434140021] [2020-10-28 08:52:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:52,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:52,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:57,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 08:52:57,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:57,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 08:52:57,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:57,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:57,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:52:57,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:57,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:52:57,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:57,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:57,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:57,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:57,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:57,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:57,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:57,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:57,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:57,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:57,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:57,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:57,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-10-28 08:52:57,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434140021] [2020-10-28 08:52:57,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:57,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:52:57,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982414397] [2020-10-28 08:52:57,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:52:57,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:57,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:52:57,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:52:57,856 INFO L87 Difference]: Start difference. First operand 137 states and 165 transitions. Second operand 24 states. [2020-10-28 08:52:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:58,127 INFO L93 Difference]: Finished difference Result 230 states and 286 transitions. [2020-10-28 08:52:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:52:58,127 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 96 [2020-10-28 08:52:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:58,129 INFO L225 Difference]: With dead ends: 230 [2020-10-28 08:52:58,129 INFO L226 Difference]: Without dead ends: 140 [2020-10-28 08:52:58,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:52:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-28 08:52:58,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-28 08:52:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-28 08:52:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 167 transitions. [2020-10-28 08:52:58,137 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 167 transitions. Word has length 96 [2020-10-28 08:52:58,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:58,137 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 167 transitions. [2020-10-28 08:52:58,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:52:58,138 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 167 transitions. [2020-10-28 08:52:58,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 08:52:58,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:58,139 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:58,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:52:58,139 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:58,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:58,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1873052193, now seen corresponding path program 31 times [2020-10-28 08:52:58,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:58,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399624667] [2020-10-28 08:52:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:58,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:58,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:03,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:03,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 08:53:03,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:03,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:53:03,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:03,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:03,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:53:03,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 08:53:03,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:53:03,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:03,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:03,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:03,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:03,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:03,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:03,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:03,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:03,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:03,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:03,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:03,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:03,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-28 08:53:03,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399624667] [2020-10-28 08:53:03,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:03,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:53:03,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249184074] [2020-10-28 08:53:03,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:53:03,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:03,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:53:03,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:53:03,380 INFO L87 Difference]: Start difference. First operand 139 states and 167 transitions. Second operand 16 states. [2020-10-28 08:53:03,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:03,604 INFO L93 Difference]: Finished difference Result 238 states and 299 transitions. [2020-10-28 08:53:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:53:03,605 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 98 [2020-10-28 08:53:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:03,606 INFO L225 Difference]: With dead ends: 238 [2020-10-28 08:53:03,606 INFO L226 Difference]: Without dead ends: 149 [2020-10-28 08:53:03,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:53:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-28 08:53:03,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2020-10-28 08:53:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-28 08:53:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2020-10-28 08:53:03,614 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 98 [2020-10-28 08:53:03,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:03,614 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2020-10-28 08:53:03,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:53:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2020-10-28 08:53:03,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:53:03,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:03,615 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:03,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:53:03,616 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:03,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:03,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1034745486, now seen corresponding path program 32 times [2020-10-28 08:53:03,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:03,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548861043] [2020-10-28 08:53:03,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:03,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:03,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:08,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:08,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:53:08,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:08,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:53:08,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:08,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:08,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:53:08,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:08,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:53:08,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:09,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:09,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:09,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:09,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:09,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:09,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:09,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:09,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:09,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:09,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:09,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-10-28 08:53:09,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548861043] [2020-10-28 08:53:09,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:09,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:53:09,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675809311] [2020-10-28 08:53:09,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:53:09,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:53:09,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:53:09,110 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand 25 states. [2020-10-28 08:53:09,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:09,363 INFO L93 Difference]: Finished difference Result 244 states and 304 transitions. [2020-10-28 08:53:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:53:09,363 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 101 [2020-10-28 08:53:09,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:09,365 INFO L225 Difference]: With dead ends: 244 [2020-10-28 08:53:09,365 INFO L226 Difference]: Without dead ends: 148 [2020-10-28 08:53:09,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:53:09,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-28 08:53:09,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-28 08:53:09,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-28 08:53:09,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2020-10-28 08:53:09,373 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 101 [2020-10-28 08:53:09,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:09,374 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2020-10-28 08:53:09,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:53:09,374 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2020-10-28 08:53:09,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 08:53:09,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:09,375 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:09,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:53:09,375 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:09,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:09,376 INFO L82 PathProgramCache]: Analyzing trace with hash -935441300, now seen corresponding path program 33 times [2020-10-28 08:53:09,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:09,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923426914] [2020-10-28 08:53:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:09,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:09,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:14,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:14,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 08:53:14,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:14,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 08:53:14,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:14,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:14,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:53:14,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:14,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 08:53:14,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:14,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:14,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:14,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:14,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:14,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:14,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:14,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:14,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:14,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:14,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:14,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:14,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-10-28 08:53:14,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923426914] [2020-10-28 08:53:14,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:14,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:53:14,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779347079] [2020-10-28 08:53:14,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:53:14,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:14,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:53:14,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:53:14,916 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand 26 states. [2020-10-28 08:53:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:15,178 INFO L93 Difference]: Finished difference Result 246 states and 306 transitions. [2020-10-28 08:53:15,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:53:15,179 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 103 [2020-10-28 08:53:15,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:15,181 INFO L225 Difference]: With dead ends: 246 [2020-10-28 08:53:15,181 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 08:53:15,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:53:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 08:53:15,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-28 08:53:15,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-28 08:53:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 179 transitions. [2020-10-28 08:53:15,190 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 179 transitions. Word has length 103 [2020-10-28 08:53:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:15,191 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 179 transitions. [2020-10-28 08:53:15,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:53:15,191 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 179 transitions. [2020-10-28 08:53:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 08:53:15,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:15,192 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:15,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:53:15,192 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:15,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:15,192 INFO L82 PathProgramCache]: Analyzing trace with hash -204365110, now seen corresponding path program 34 times [2020-10-28 08:53:15,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:15,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520146331] [2020-10-28 08:53:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:15,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:15,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:20,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:20,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 08:53:20,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:20,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 08:53:20,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:20,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:20,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:53:20,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 08:53:20,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 08:53:20,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:20,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:20,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:20,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:20,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:20,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:20,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:20,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:20,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:20,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:20,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:20,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:20,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-28 08:53:20,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520146331] [2020-10-28 08:53:20,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:20,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:53:20,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643240328] [2020-10-28 08:53:20,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:53:20,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:20,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:53:20,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:53:20,462 INFO L87 Difference]: Start difference. First operand 149 states and 179 transitions. Second operand 17 states. [2020-10-28 08:53:20,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:20,716 INFO L93 Difference]: Finished difference Result 254 states and 319 transitions. [2020-10-28 08:53:20,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:53:20,716 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 105 [2020-10-28 08:53:20,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:20,718 INFO L225 Difference]: With dead ends: 254 [2020-10-28 08:53:20,718 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 08:53:20,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:53:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 08:53:20,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2020-10-28 08:53:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-28 08:53:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2020-10-28 08:53:20,727 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 105 [2020-10-28 08:53:20,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:20,727 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2020-10-28 08:53:20,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:53:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2020-10-28 08:53:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 08:53:20,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:20,728 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:20,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:53:20,728 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1354816061, now seen corresponding path program 35 times [2020-10-28 08:53:20,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:20,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841955122] [2020-10-28 08:53:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:20,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:20,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:25,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:25,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 08:53:25,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:25,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 08:53:25,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:25,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:25,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:53:25,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 08:53:25,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:26,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:26,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:26,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:26,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:26,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:26,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:26,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:26,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:26,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:26,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:26,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:26,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-28 08:53:26,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841955122] [2020-10-28 08:53:26,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:26,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:53:26,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240081893] [2020-10-28 08:53:26,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:53:26,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:26,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:53:26,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:53:26,323 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand 27 states. [2020-10-28 08:53:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:26,592 INFO L93 Difference]: Finished difference Result 260 states and 324 transitions. [2020-10-28 08:53:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 08:53:26,592 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 108 [2020-10-28 08:53:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:26,594 INFO L225 Difference]: With dead ends: 260 [2020-10-28 08:53:26,594 INFO L226 Difference]: Without dead ends: 158 [2020-10-28 08:53:26,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:53:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-28 08:53:26,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-28 08:53:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-28 08:53:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 189 transitions. [2020-10-28 08:53:26,607 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 189 transitions. Word has length 108 [2020-10-28 08:53:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:26,607 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 189 transitions. [2020-10-28 08:53:26,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 08:53:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 189 transitions. [2020-10-28 08:53:26,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-28 08:53:26,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:26,608 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:26,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 08:53:26,609 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:26,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:26,609 INFO L82 PathProgramCache]: Analyzing trace with hash 683219493, now seen corresponding path program 36 times [2020-10-28 08:53:26,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:26,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746801862] [2020-10-28 08:53:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:26,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:26,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:31,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:31,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 08:53:31,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:31,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 08:53:31,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:31,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:31,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:53:31,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-28 08:53:31,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:53:31,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:31,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:31,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:31,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:31,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:31,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:31,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:31,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:31,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:31,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:31,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-28 08:53:31,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746801862] [2020-10-28 08:53:31,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:31,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:53:31,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346935381] [2020-10-28 08:53:31,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:53:31,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:31,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:53:31,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:53:31,913 INFO L87 Difference]: Start difference. First operand 157 states and 189 transitions. Second operand 18 states. [2020-10-28 08:53:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:32,143 INFO L93 Difference]: Finished difference Result 268 states and 337 transitions. [2020-10-28 08:53:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:53:32,144 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 110 [2020-10-28 08:53:32,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:32,145 INFO L225 Difference]: With dead ends: 268 [2020-10-28 08:53:32,145 INFO L226 Difference]: Without dead ends: 167 [2020-10-28 08:53:32,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:53:32,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-28 08:53:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2020-10-28 08:53:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-28 08:53:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 197 transitions. [2020-10-28 08:53:32,157 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 197 transitions. Word has length 110 [2020-10-28 08:53:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:32,158 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 197 transitions. [2020-10-28 08:53:32,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:53:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 197 transitions. [2020-10-28 08:53:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 08:53:32,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:32,159 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:32,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 08:53:32,159 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:32,160 INFO L82 PathProgramCache]: Analyzing trace with hash 859417736, now seen corresponding path program 37 times [2020-10-28 08:53:32,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:32,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785252306] [2020-10-28 08:53:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:32,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:32,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:37,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:37,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 08:53:37,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:37,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-28 08:53:37,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:37,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 08:53:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:37,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 08:53:37,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:37,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:37,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:37,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:37,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:37,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:37,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:37,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:37,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:37,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:37,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:37,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:37,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-10-28 08:53:37,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785252306] [2020-10-28 08:53:37,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:37,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 08:53:37,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776328061] [2020-10-28 08:53:37,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 08:53:37,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:37,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 08:53:37,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:53:37,795 INFO L87 Difference]: Start difference. First operand 163 states and 197 transitions. Second operand 28 states. [2020-10-28 08:53:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:38,016 INFO L93 Difference]: Finished difference Result 274 states and 342 transitions. [2020-10-28 08:53:38,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 08:53:38,016 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 113 [2020-10-28 08:53:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:38,018 INFO L225 Difference]: With dead ends: 274 [2020-10-28 08:53:38,019 INFO L226 Difference]: Without dead ends: 166 [2020-10-28 08:53:38,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:53:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-28 08:53:38,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-10-28 08:53:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-28 08:53:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2020-10-28 08:53:38,026 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 113 [2020-10-28 08:53:38,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:38,026 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2020-10-28 08:53:38,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 08:53:38,026 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2020-10-28 08:53:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 08:53:38,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:38,027 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:38,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 08:53:38,028 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:38,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:38,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1022155418, now seen corresponding path program 38 times [2020-10-28 08:53:38,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:38,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663855639] [2020-10-28 08:53:38,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:38,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:38,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:43,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:43,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 08:53:43,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:43,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 08:53:43,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:43,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:43,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 08:53:43,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:43,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 08:53:43,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:43,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:43,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:43,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:43,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:43,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:43,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:43,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:43,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:43,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:43,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:43,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:43,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-10-28 08:53:43,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663855639] [2020-10-28 08:53:43,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:43,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 08:53:43,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732949198] [2020-10-28 08:53:43,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 08:53:43,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:43,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 08:53:43,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:53:43,695 INFO L87 Difference]: Start difference. First operand 165 states and 199 transitions. Second operand 29 states. [2020-10-28 08:53:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:43,939 INFO L93 Difference]: Finished difference Result 276 states and 344 transitions. [2020-10-28 08:53:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:53:43,939 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-10-28 08:53:43,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:43,941 INFO L225 Difference]: With dead ends: 276 [2020-10-28 08:53:43,941 INFO L226 Difference]: Without dead ends: 168 [2020-10-28 08:53:43,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:53:43,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-28 08:53:43,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-10-28 08:53:43,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-28 08:53:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 201 transitions. [2020-10-28 08:53:43,950 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 201 transitions. Word has length 115 [2020-10-28 08:53:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:43,951 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 201 transitions. [2020-10-28 08:53:43,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 08:53:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 201 transitions. [2020-10-28 08:53:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 08:53:43,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:43,952 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:43,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 08:53:43,952 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1032724796, now seen corresponding path program 39 times [2020-10-28 08:53:43,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:43,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203892491] [2020-10-28 08:53:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:43,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:44,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:49,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:49,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 08:53:49,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:49,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-28 08:53:49,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:49,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:53:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 08:53:49,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 08:53:49,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:49,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:49,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:49,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:49,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:49,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:49,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:49,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:49,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:49,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:49,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:49,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:49,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-28 08:53:49,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203892491] [2020-10-28 08:53:49,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:49,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:53:49,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602709337] [2020-10-28 08:53:49,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:53:49,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:49,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:53:49,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:53:49,313 INFO L87 Difference]: Start difference. First operand 167 states and 201 transitions. Second operand 19 states. [2020-10-28 08:53:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:49,547 INFO L93 Difference]: Finished difference Result 284 states and 357 transitions. [2020-10-28 08:53:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:53:49,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 117 [2020-10-28 08:53:49,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:49,549 INFO L225 Difference]: With dead ends: 284 [2020-10-28 08:53:49,550 INFO L226 Difference]: Without dead ends: 177 [2020-10-28 08:53:49,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:53:49,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-28 08:53:49,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 173. [2020-10-28 08:53:49,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-28 08:53:49,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 209 transitions. [2020-10-28 08:53:49,569 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 209 transitions. Word has length 117 [2020-10-28 08:53:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:49,574 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 209 transitions. [2020-10-28 08:53:49,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:53:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 209 transitions. [2020-10-28 08:53:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 08:53:49,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:49,575 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:49,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 08:53:49,576 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:49,576 INFO L82 PathProgramCache]: Analyzing trace with hash -136138871, now seen corresponding path program 40 times [2020-10-28 08:53:49,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:49,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607403392] [2020-10-28 08:53:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:49,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:49,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:54,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:54,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 08:53:54,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:54,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 08:53:54,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:54,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:54,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 08:53:54,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:54,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 08:53:54,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:55,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:55,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:55,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:55,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:55,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:55,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:55,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:55,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:55,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:55,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-10-28 08:53:55,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607403392] [2020-10-28 08:53:55,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:55,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 08:53:55,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226068403] [2020-10-28 08:53:55,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 08:53:55,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:55,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 08:53:55,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:53:55,301 INFO L87 Difference]: Start difference. First operand 173 states and 209 transitions. Second operand 30 states. [2020-10-28 08:53:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:55,607 INFO L93 Difference]: Finished difference Result 290 states and 362 transitions. [2020-10-28 08:53:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 08:53:55,608 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2020-10-28 08:53:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:55,609 INFO L225 Difference]: With dead ends: 290 [2020-10-28 08:53:55,609 INFO L226 Difference]: Without dead ends: 176 [2020-10-28 08:53:55,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:53:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-28 08:53:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-10-28 08:53:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-28 08:53:55,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2020-10-28 08:53:55,618 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 120 [2020-10-28 08:53:55,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:55,618 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2020-10-28 08:53:55,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 08:53:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2020-10-28 08:53:55,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-28 08:53:55,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:55,620 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:55,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 08:53:55,620 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:55,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:55,620 INFO L82 PathProgramCache]: Analyzing trace with hash 876028139, now seen corresponding path program 41 times [2020-10-28 08:53:55,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:55,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868315054] [2020-10-28 08:53:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:55,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:55,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:00,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:00,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 08:54:00,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:00,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 08:54:00,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:00,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:00,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:54:00,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-28 08:54:00,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 08:54:00,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:00,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:00,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:00,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:00,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:00,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:00,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:54:00,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:00,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:00,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:00,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-28 08:54:01,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868315054] [2020-10-28 08:54:01,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:01,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:54:01,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453267335] [2020-10-28 08:54:01,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:54:01,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:01,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:54:01,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:54:01,016 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand 20 states. [2020-10-28 08:54:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:01,268 INFO L93 Difference]: Finished difference Result 298 states and 375 transitions. [2020-10-28 08:54:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:54:01,269 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 122 [2020-10-28 08:54:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:01,271 INFO L225 Difference]: With dead ends: 298 [2020-10-28 08:54:01,271 INFO L226 Difference]: Without dead ends: 185 [2020-10-28 08:54:01,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:54:01,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-28 08:54:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2020-10-28 08:54:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-28 08:54:01,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 219 transitions. [2020-10-28 08:54:01,280 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 219 transitions. Word has length 122 [2020-10-28 08:54:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:01,281 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 219 transitions. [2020-10-28 08:54:01,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:54:01,281 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 219 transitions. [2020-10-28 08:54:01,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 08:54:01,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:01,282 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:01,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 08:54:01,282 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:01,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:01,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1844451326, now seen corresponding path program 42 times [2020-10-28 08:54:01,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:01,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284679277] [2020-10-28 08:54:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:01,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:01,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:06,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:06,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 08:54:06,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:06,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:54:06,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:06,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:06,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 08:54:06,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:06,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 08:54:06,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:06,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:06,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:06,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:06,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:06,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:06,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:06,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:06,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:06,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:06,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:06,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:06,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-10-28 08:54:07,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284679277] [2020-10-28 08:54:07,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:07,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 08:54:07,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202536426] [2020-10-28 08:54:07,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 08:54:07,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:07,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 08:54:07,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:54:07,002 INFO L87 Difference]: Start difference. First operand 181 states and 219 transitions. Second operand 31 states. [2020-10-28 08:54:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:07,293 INFO L93 Difference]: Finished difference Result 304 states and 380 transitions. [2020-10-28 08:54:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 08:54:07,293 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 125 [2020-10-28 08:54:07,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:07,295 INFO L225 Difference]: With dead ends: 304 [2020-10-28 08:54:07,295 INFO L226 Difference]: Without dead ends: 184 [2020-10-28 08:54:07,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:54:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-28 08:54:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-10-28 08:54:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-28 08:54:07,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 221 transitions. [2020-10-28 08:54:07,303 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 221 transitions. Word has length 125 [2020-10-28 08:54:07,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:07,303 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 221 transitions. [2020-10-28 08:54:07,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 08:54:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 221 transitions. [2020-10-28 08:54:07,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 08:54:07,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:07,304 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:07,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 08:54:07,305 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:07,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1695876064, now seen corresponding path program 43 times [2020-10-28 08:54:07,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:07,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489534684] [2020-10-28 08:54:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:07,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:07,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:12,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:12,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 08:54:12,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:12,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-28 08:54:12,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:12,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 08:54:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 08:54:12,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:13,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:13,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:13,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:13,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:13,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:13,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:54:13,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:13,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:13,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:13,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:13,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:13,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2020-10-28 08:54:13,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489534684] [2020-10-28 08:54:13,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:13,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 08:54:13,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30597554] [2020-10-28 08:54:13,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 08:54:13,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:13,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 08:54:13,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:54:13,078 INFO L87 Difference]: Start difference. First operand 183 states and 221 transitions. Second operand 32 states. [2020-10-28 08:54:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:13,406 INFO L93 Difference]: Finished difference Result 306 states and 382 transitions. [2020-10-28 08:54:13,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 08:54:13,407 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 127 [2020-10-28 08:54:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:13,409 INFO L225 Difference]: With dead ends: 306 [2020-10-28 08:54:13,409 INFO L226 Difference]: Without dead ends: 186 [2020-10-28 08:54:13,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:54:13,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-28 08:54:13,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2020-10-28 08:54:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-28 08:54:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 223 transitions. [2020-10-28 08:54:13,418 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 223 transitions. Word has length 127 [2020-10-28 08:54:13,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:13,418 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 223 transitions. [2020-10-28 08:54:13,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 08:54:13,418 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 223 transitions. [2020-10-28 08:54:13,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-28 08:54:13,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:13,419 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:13,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 08:54:13,420 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:13,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:13,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1958567874, now seen corresponding path program 44 times [2020-10-28 08:54:13,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:13,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588653516] [2020-10-28 08:54:13,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:13,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:13,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:18,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:18,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 08:54:18,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:18,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-28 08:54:18,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:18,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:18,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:54:18,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 08:54:18,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 08:54:18,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:18,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:18,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:18,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:18,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:18,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:18,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:18,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:18,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:18,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:18,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:18,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:18,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-28 08:54:18,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588653516] [2020-10-28 08:54:18,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:18,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:54:18,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883387764] [2020-10-28 08:54:18,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:54:18,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:18,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:54:18,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:54:18,857 INFO L87 Difference]: Start difference. First operand 185 states and 223 transitions. Second operand 21 states. [2020-10-28 08:54:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:19,090 INFO L93 Difference]: Finished difference Result 314 states and 395 transitions. [2020-10-28 08:54:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:54:19,091 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 129 [2020-10-28 08:54:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:19,092 INFO L225 Difference]: With dead ends: 314 [2020-10-28 08:54:19,093 INFO L226 Difference]: Without dead ends: 195 [2020-10-28 08:54:19,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:54:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-28 08:54:19,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2020-10-28 08:54:19,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-28 08:54:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 231 transitions. [2020-10-28 08:54:19,102 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 231 transitions. Word has length 129 [2020-10-28 08:54:19,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:19,104 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 231 transitions. [2020-10-28 08:54:19,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:54:19,104 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 231 transitions. [2020-10-28 08:54:19,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-28 08:54:19,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:19,105 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:19,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 08:54:19,106 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:19,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:19,106 INFO L82 PathProgramCache]: Analyzing trace with hash 352699343, now seen corresponding path program 45 times [2020-10-28 08:54:19,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:19,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835840297] [2020-10-28 08:54:19,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:19,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:19,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:24,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:24,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 08:54:24,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:24,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 08:54:24,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:24,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:24,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 08:54:24,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:24,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 08:54:24,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:24,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:24,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:24,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:24,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:24,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:24,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:24,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:24,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:24,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:24,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:24,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:24,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2020-10-28 08:54:24,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835840297] [2020-10-28 08:54:24,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:24,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 08:54:24,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416688358] [2020-10-28 08:54:24,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 08:54:24,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:24,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 08:54:24,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:54:24,950 INFO L87 Difference]: Start difference. First operand 191 states and 231 transitions. Second operand 33 states. [2020-10-28 08:54:25,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:25,222 INFO L93 Difference]: Finished difference Result 320 states and 400 transitions. [2020-10-28 08:54:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 08:54:25,223 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 132 [2020-10-28 08:54:25,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:25,224 INFO L225 Difference]: With dead ends: 320 [2020-10-28 08:54:25,225 INFO L226 Difference]: Without dead ends: 194 [2020-10-28 08:54:25,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:54:25,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-28 08:54:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2020-10-28 08:54:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-28 08:54:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 233 transitions. [2020-10-28 08:54:25,233 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 233 transitions. Word has length 132 [2020-10-28 08:54:25,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:25,234 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 233 transitions. [2020-10-28 08:54:25,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 08:54:25,234 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 233 transitions. [2020-10-28 08:54:25,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-28 08:54:25,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:25,235 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:25,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 08:54:25,236 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:25,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:25,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1755237839, now seen corresponding path program 46 times [2020-10-28 08:54:25,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:25,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196158410] [2020-10-28 08:54:25,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:25,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:25,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:30,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:30,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-28 08:54:30,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:30,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 08:54:30,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:30,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 08:54:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:30,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 08:54:30,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:31,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:31,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:31,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:31,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:31,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:31,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:31,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:31,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:31,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:31,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:31,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:31,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2020-10-28 08:54:31,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196158410] [2020-10-28 08:54:31,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:31,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 08:54:31,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724685742] [2020-10-28 08:54:31,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 08:54:31,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:31,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 08:54:31,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:54:31,122 INFO L87 Difference]: Start difference. First operand 193 states and 233 transitions. Second operand 34 states. [2020-10-28 08:54:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:31,353 INFO L93 Difference]: Finished difference Result 322 states and 402 transitions. [2020-10-28 08:54:31,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 08:54:31,354 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 134 [2020-10-28 08:54:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:31,356 INFO L225 Difference]: With dead ends: 322 [2020-10-28 08:54:31,356 INFO L226 Difference]: Without dead ends: 196 [2020-10-28 08:54:31,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:54:31,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-28 08:54:31,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-10-28 08:54:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-28 08:54:31,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 235 transitions. [2020-10-28 08:54:31,366 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 235 transitions. Word has length 134 [2020-10-28 08:54:31,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:31,367 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 235 transitions. [2020-10-28 08:54:31,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 08:54:31,368 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 235 transitions. [2020-10-28 08:54:31,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-28 08:54:31,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:31,370 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:31,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 08:54:31,371 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:31,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:31,371 INFO L82 PathProgramCache]: Analyzing trace with hash -258306029, now seen corresponding path program 47 times [2020-10-28 08:54:31,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:31,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72822599] [2020-10-28 08:54:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:31,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:31,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:36,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:36,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-28 08:54:36,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:36,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-28 08:54:36,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:36,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:36,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:54:36,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-28 08:54:36,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 08:54:36,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:36,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:36,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:36,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:36,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:36,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:36,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:36,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:36,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:36,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:36,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:36,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:36,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1439 backedges. 1 proven. 477 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-28 08:54:36,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72822599] [2020-10-28 08:54:36,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:36,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:54:36,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619606126] [2020-10-28 08:54:36,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:54:36,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:36,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:54:36,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:54:36,841 INFO L87 Difference]: Start difference. First operand 195 states and 235 transitions. Second operand 22 states. [2020-10-28 08:54:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:37,146 INFO L93 Difference]: Finished difference Result 330 states and 415 transitions. [2020-10-28 08:54:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:54:37,147 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 136 [2020-10-28 08:54:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:37,149 INFO L225 Difference]: With dead ends: 330 [2020-10-28 08:54:37,149 INFO L226 Difference]: Without dead ends: 205 [2020-10-28 08:54:37,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:54:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-28 08:54:37,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2020-10-28 08:54:37,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-28 08:54:37,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 243 transitions. [2020-10-28 08:54:37,158 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 243 transitions. Word has length 136 [2020-10-28 08:54:37,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:37,158 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 243 transitions. [2020-10-28 08:54:37,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:54:37,159 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 243 transitions. [2020-10-28 08:54:37,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 08:54:37,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:37,160 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:37,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 08:54:37,160 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:37,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:37,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1990965286, now seen corresponding path program 48 times [2020-10-28 08:54:37,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:37,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127722608] [2020-10-28 08:54:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:37,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:37,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking...