/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:19:02,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:19:02,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:19:02,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:19:02,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:19:02,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:19:02,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:19:02,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:19:02,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:19:02,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:19:02,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:19:02,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:19:02,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:19:02,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:19:02,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:19:02,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:19:02,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:19:02,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:19:02,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:19:02,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:19:02,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:19:02,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:19:02,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:19:02,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:19:03,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:19:03,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:19:03,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:19:03,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:19:03,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:19:03,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:19:03,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:19:03,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:19:03,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:19:03,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:19:03,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:19:03,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:19:03,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:19:03,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:19:03,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:19:03,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:19:03,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:19:03,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:19:03,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:19:03,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:19:03,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:19:03,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:19:03,063 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:19:03,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:19:03,063 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:19:03,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:19:03,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:19:03,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:19:03,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:19:03,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:19:03,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:19:03,065 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:19:03,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:19:03,065 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:19:03,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:19:03,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:19:03,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:19:03,066 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:19:03,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:19:03,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:19:03,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:19:03,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:19:03,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:19:03,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:19:03,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:19:03,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:19:03,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:19:03,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:19:03,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:19:03,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:19:03,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:19:03,571 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:19:03,571 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:19:03,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2020-10-27 14:19:03,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92dbdbe16/497aabe987054aaa8fb923cd7cd35b13/FLAGe22f827e9 [2020-10-27 14:19:04,480 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:19:04,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2020-10-27 14:19:04,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92dbdbe16/497aabe987054aaa8fb923cd7cd35b13/FLAGe22f827e9 [2020-10-27 14:19:04,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92dbdbe16/497aabe987054aaa8fb923cd7cd35b13 [2020-10-27 14:19:04,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:19:04,823 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:19:04,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:19:04,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:19:04,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:19:04,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:19:04" (1/1) ... [2020-10-27 14:19:04,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea86f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:04, skipping insertion in model container [2020-10-27 14:19:04,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:19:04" (1/1) ... [2020-10-27 14:19:04,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:19:04,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:19:05,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:19:05,133 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:19:05,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:19:05,191 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:19:05,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:05 WrapperNode [2020-10-27 14:19:05,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:19:05,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:19:05,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:19:05,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:19:05,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:05" (1/1) ... [2020-10-27 14:19:05,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:05" (1/1) ... [2020-10-27 14:19:05,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:05" (1/1) ... [2020-10-27 14:19:05,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:05" (1/1) ... [2020-10-27 14:19:05,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:05" (1/1) ... [2020-10-27 14:19:05,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:05" (1/1) ... [2020-10-27 14:19:05,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:05" (1/1) ... [2020-10-27 14:19:05,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:19:05,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:19:05,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:19:05,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:19:05,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:19:05,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:19:05,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:19:05,335 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:19:05,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:19:05,336 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:19:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:19:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:19:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:19:05,336 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:19:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:19:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:19:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:19:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:19:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:19:05,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:19:05,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:19:05,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:19:05,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:19:05,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:19:05,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:19:05,996 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:19:05,997 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-27 14:19:05,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:19:05 BoogieIcfgContainer [2020-10-27 14:19:05,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:19:06,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:19:06,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:19:06,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:19:06,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:19:04" (1/3) ... [2020-10-27 14:19:06,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ffd454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:19:06, skipping insertion in model container [2020-10-27 14:19:06,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:05" (2/3) ... [2020-10-27 14:19:06,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ffd454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:19:06, skipping insertion in model container [2020-10-27 14:19:06,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:19:05" (3/3) ... [2020-10-27 14:19:06,010 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-2.i [2020-10-27 14:19:06,026 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:19:06,033 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:19:06,049 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:19:06,078 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:19:06,078 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:19:06,078 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:19:06,078 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:19:06,079 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:19:06,079 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:19:06,079 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:19:06,079 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:19:06,098 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-27 14:19:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 14:19:06,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:06,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:06,107 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:06,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:06,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1013743180, now seen corresponding path program 1 times [2020-10-27 14:19:06,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:06,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653942987] [2020-10-27 14:19:06,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:06,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:06,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:06,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:06,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:06,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:06,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:06,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:06,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:09,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:19:09,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:19:09,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2776 [2020-10-27 14:19:09,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:09,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:19:09,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:19:09,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:19:09,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:19:09,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:09,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:09,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:09,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:09,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 14:19:09,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:09,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:09,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:19:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:19:09,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653942987] [2020-10-27 14:19:09,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:19:09,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:19:09,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342483403] [2020-10-27 14:19:09,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:19:09,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:09,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:19:09,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:19:09,259 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2020-10-27 14:19:09,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:09,518 INFO L93 Difference]: Finished difference Result 103 states and 155 transitions. [2020-10-27 14:19:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:19:09,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 14:19:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:09,530 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:19:09,530 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:19:09,534 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 [2020-10-27 14:19:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:19:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-10-27 14:19:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 14:19:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-27 14:19:09,587 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 29 [2020-10-27 14:19:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:09,587 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-27 14:19:09,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:19:09,588 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-27 14:19:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:19:09,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:09,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:09,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:19:09,590 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:09,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:09,591 INFO L82 PathProgramCache]: Analyzing trace with hash 188130124, now seen corresponding path program 1 times [2020-10-27 14:19:09,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:09,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338197006] [2020-10-27 14:19:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:09,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:09,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:14,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:14,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:19:14,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:19:14,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 14:19:14,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:19:14,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:19:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:19:14,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:14,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:14,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:14,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:14,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:14,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:14,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:14,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:14,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:14,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:14,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:14,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:19:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:19:14,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338197006] [2020-10-27 14:19:14,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:14,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:19:14,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254012222] [2020-10-27 14:19:14,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:19:14,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:14,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:19:14,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:19:14,792 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 5 states. [2020-10-27 14:19:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:15,111 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2020-10-27 14:19:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:19:15,112 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-27 14:19:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:15,114 INFO L225 Difference]: With dead ends: 107 [2020-10-27 14:19:15,116 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 14:19:15,118 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 [2020-10-27 14:19:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 14:19:15,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-10-27 14:19:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:19:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2020-10-27 14:19:15,145 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 43 [2020-10-27 14:19:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:15,145 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2020-10-27 14:19:15,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:19:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2020-10-27 14:19:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:19:15,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:15,151 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:15,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:19:15,152 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:15,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:15,154 INFO L82 PathProgramCache]: Analyzing trace with hash 139617246, now seen corresponding path program 2 times [2020-10-27 14:19:15,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:15,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389686807] [2020-10-27 14:19:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:15,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:15,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:15,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:15,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:15,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:15,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:20,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:20,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:19:20,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:19:20,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:19:20,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:20,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:19:20,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:19:20,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:19:20,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:20,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:20,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:20,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:20,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:20,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:20,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:19:20,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:20,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:20,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-27 14:19:20,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389686807] [2020-10-27 14:19:20,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:20,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:19:20,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078358931] [2020-10-27 14:19:20,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:19:20,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:20,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:19:20,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:19:20,291 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 6 states. [2020-10-27 14:19:20,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:20,587 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2020-10-27 14:19:20,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:19:20,587 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 14:19:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:20,589 INFO L225 Difference]: With dead ends: 133 [2020-10-27 14:19:20,589 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:19:20,590 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 [2020-10-27 14:19:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:19:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2020-10-27 14:19:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 14:19:20,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-10-27 14:19:20,602 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 57 [2020-10-27 14:19:20,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:20,602 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-10-27 14:19:20,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:19:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-10-27 14:19:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:19:20,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:20,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:20,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:19:20,605 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:20,606 INFO L82 PathProgramCache]: Analyzing trace with hash -277529360, now seen corresponding path program 3 times [2020-10-27 14:19:20,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:20,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708573229] [2020-10-27 14:19:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:20,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:20,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:20,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:20,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:20,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:20,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:25,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:25,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 14:19:25,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:25,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 14:19:25,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:19:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:19:25,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:19:25,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:25,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:25,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:25,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:25,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:25,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:25,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:25,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:25,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:25,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:25,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:25,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-27 14:19:25,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708573229] [2020-10-27 14:19:25,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:25,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:19:25,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632384252] [2020-10-27 14:19:25,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:19:25,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:25,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:19:25,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:19:25,748 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 7 states. [2020-10-27 14:19:26,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:26,029 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2020-10-27 14:19:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:19:26,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-27 14:19:26,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:26,031 INFO L225 Difference]: With dead ends: 159 [2020-10-27 14:19:26,031 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 14:19:26,032 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 [2020-10-27 14:19:26,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 14:19:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-10-27 14:19:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 14:19:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2020-10-27 14:19:26,044 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 71 [2020-10-27 14:19:26,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:26,044 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2020-10-27 14:19:26,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:19:26,044 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2020-10-27 14:19:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 14:19:26,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:26,046 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:26,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:19:26,047 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:26,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:26,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1826992510, now seen corresponding path program 4 times [2020-10-27 14:19:26,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:26,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146436310] [2020-10-27 14:19:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:26,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:31,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:19:31,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:31,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:19:31,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:31,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:19:31,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:19:31,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:19:31,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:31,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:31,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:31,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:31,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:31,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:19:31,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:31,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:31,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:31,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:31,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-27 14:19:31,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146436310] [2020-10-27 14:19:31,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:31,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:19:31,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115339666] [2020-10-27 14:19:31,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:19:31,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:31,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:19:31,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:19:31,207 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand 8 states. [2020-10-27 14:19:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:31,553 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-10-27 14:19:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:19:31,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-27 14:19:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:31,558 INFO L225 Difference]: With dead ends: 185 [2020-10-27 14:19:31,558 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 14:19:31,562 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 [2020-10-27 14:19:31,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 14:19:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2020-10-27 14:19:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 14:19:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2020-10-27 14:19:31,583 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 85 [2020-10-27 14:19:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:31,583 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2020-10-27 14:19:31,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:19:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2020-10-27 14:19:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:19:31,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:31,588 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:31,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:19:31,589 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:31,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1405401236, now seen corresponding path program 5 times [2020-10-27 14:19:31,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:31,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950373146] [2020-10-27 14:19:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:31,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:36,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:36,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 14:19:36,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:36,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-27 14:19:36,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:19:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:19:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:19:36,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:36,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:36,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:36,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:36,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:36,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:36,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:36,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:36,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:36,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:36,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:36,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-27 14:19:36,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950373146] [2020-10-27 14:19:36,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:36,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:19:36,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15404086] [2020-10-27 14:19:36,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:19:36,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:36,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:19:36,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:19:36,853 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand 9 states. [2020-10-27 14:19:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:37,249 INFO L93 Difference]: Finished difference Result 211 states and 232 transitions. [2020-10-27 14:19:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:19:37,249 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 99 [2020-10-27 14:19:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:37,251 INFO L225 Difference]: With dead ends: 211 [2020-10-27 14:19:37,251 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:19:37,252 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 [2020-10-27 14:19:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:19:37,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2020-10-27 14:19:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 14:19:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-10-27 14:19:37,265 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 99 [2020-10-27 14:19:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:37,266 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-10-27 14:19:37,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:19:37,266 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-10-27 14:19:37,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 14:19:37,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:37,270 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:37,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:19:37,271 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:37,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:37,271 INFO L82 PathProgramCache]: Analyzing trace with hash -234906842, now seen corresponding path program 6 times [2020-10-27 14:19:37,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:37,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361227766] [2020-10-27 14:19:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:37,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:38,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:42,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:42,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 14:19:42,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:42,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5210 [2020-10-27 14:19:42,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:42,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:19:42,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 14:19:42,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:19:42,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:42,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:42,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:42,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:42,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:42,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:42,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:42,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:42,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:42,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:42,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:42,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:19:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-27 14:19:42,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361227766] [2020-10-27 14:19:42,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:42,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:19:42,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671831319] [2020-10-27 14:19:42,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:19:42,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:42,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:19:42,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:19:42,654 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 10 states. [2020-10-27 14:19:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:43,032 INFO L93 Difference]: Finished difference Result 237 states and 258 transitions. [2020-10-27 14:19:43,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:19:43,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 113 [2020-10-27 14:19:43,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:43,034 INFO L225 Difference]: With dead ends: 237 [2020-10-27 14:19:43,034 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 14:19:43,035 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 [2020-10-27 14:19:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 14:19:43,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 133. [2020-10-27 14:19:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 14:19:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2020-10-27 14:19:43,065 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 113 [2020-10-27 14:19:43,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:43,066 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2020-10-27 14:19:43,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:19:43,066 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2020-10-27 14:19:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 14:19:43,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:43,075 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:43,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:19:43,075 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:43,076 INFO L82 PathProgramCache]: Analyzing trace with hash -530704840, now seen corresponding path program 7 times [2020-10-27 14:19:43,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:43,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973049595] [2020-10-27 14:19:43,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:43,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:48,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 14:19:48,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:48,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-27 14:19:48,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:19:48,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:19:48,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:19:48,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:19:48,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:48,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:48,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:48,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:48,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:48,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:48,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:48,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:48,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:48,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2020-10-27 14:19:48,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973049595] [2020-10-27 14:19:48,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:48,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:19:48,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199603149] [2020-10-27 14:19:48,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:19:48,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:48,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:19:48,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:48,377 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 11 states. [2020-10-27 14:19:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:48,887 INFO L93 Difference]: Finished difference Result 263 states and 284 transitions. [2020-10-27 14:19:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:19:48,888 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 127 [2020-10-27 14:19:48,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:48,889 INFO L225 Difference]: With dead ends: 263 [2020-10-27 14:19:48,890 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 14:19:48,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 14:19:48,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 147. [2020-10-27 14:19:48,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 14:19:48,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 155 transitions. [2020-10-27 14:19:48,918 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 155 transitions. Word has length 127 [2020-10-27 14:19:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:48,920 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 155 transitions. [2020-10-27 14:19:48,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:19:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 155 transitions. [2020-10-27 14:19:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 14:19:48,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:48,925 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:48,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:19:48,926 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:48,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:48,926 INFO L82 PathProgramCache]: Analyzing trace with hash 360401354, now seen corresponding path program 8 times [2020-10-27 14:19:48,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:48,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53654876] [2020-10-27 14:19:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:48,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:49,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:49,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:49,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:53,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:53,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 14:19:53,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:53,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-27 14:19:53,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:53,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:19:53,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 14:19:54,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:19:54,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:54,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:54,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:54,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:54,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:54,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:54,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:54,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:54,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:54,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:54,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-10-27 14:19:54,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53654876] [2020-10-27 14:19:54,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:54,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:19:54,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027779968] [2020-10-27 14:19:54,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:19:54,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:54,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:19:54,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:19:54,168 INFO L87 Difference]: Start difference. First operand 147 states and 155 transitions. Second operand 12 states. [2020-10-27 14:19:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:54,622 INFO L93 Difference]: Finished difference Result 289 states and 310 transitions. [2020-10-27 14:19:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:19:54,622 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 141 [2020-10-27 14:19:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:54,624 INFO L225 Difference]: With dead ends: 289 [2020-10-27 14:19:54,624 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 14:19:54,625 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 [2020-10-27 14:19:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 14:19:54,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2020-10-27 14:19:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-27 14:19:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 169 transitions. [2020-10-27 14:19:54,636 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 169 transitions. Word has length 141 [2020-10-27 14:19:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:54,637 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 169 transitions. [2020-10-27 14:19:54,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:19:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 169 transitions. [2020-10-27 14:19:54,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 14:19:54,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:54,639 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:54,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:19:54,640 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:54,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:54,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1576687068, now seen corresponding path program 9 times [2020-10-27 14:19:54,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:54,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586995827] [2020-10-27 14:19:54,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:54,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:59,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:59,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 14:19:59,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:59,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-27 14:19:59,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:59,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:19:59,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 14:19:59,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:19:59,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:59,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:59,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:59,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:59,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:59,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:59,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:59,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:59,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:59,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:59,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:59,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-27 14:19:59,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586995827] [2020-10-27 14:19:59,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:59,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:19:59,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064358170] [2020-10-27 14:19:59,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:19:59,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:59,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:19:59,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:19:59,886 INFO L87 Difference]: Start difference. First operand 161 states and 169 transitions. Second operand 13 states. [2020-10-27 14:20:00,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:00,360 INFO L93 Difference]: Finished difference Result 315 states and 336 transitions. [2020-10-27 14:20:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:20:00,360 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 155 [2020-10-27 14:20:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:00,362 INFO L225 Difference]: With dead ends: 315 [2020-10-27 14:20:00,362 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 14:20:00,363 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 [2020-10-27 14:20:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 14:20:00,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2020-10-27 14:20:00,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 14:20:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 183 transitions. [2020-10-27 14:20:00,374 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 183 transitions. Word has length 155 [2020-10-27 14:20:00,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:00,375 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 183 transitions. [2020-10-27 14:20:00,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:20:00,375 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 183 transitions. [2020-10-27 14:20:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 14:20:00,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:00,377 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:00,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:20:00,378 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:00,378 INFO L82 PathProgramCache]: Analyzing trace with hash 780556910, now seen corresponding path program 10 times [2020-10-27 14:20:00,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:00,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903301454] [2020-10-27 14:20:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:00,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:05,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 14:20:05,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:05,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-27 14:20:05,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:05,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:20:05,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 14:20:05,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:20:05,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:05,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:05,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:05,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:05,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:05,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:05,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:05,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:05,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-27 14:20:05,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903301454] [2020-10-27 14:20:05,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:05,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:20:05,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873140145] [2020-10-27 14:20:05,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:20:05,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:05,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:20:05,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:20:05,689 INFO L87 Difference]: Start difference. First operand 175 states and 183 transitions. Second operand 14 states. [2020-10-27 14:20:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:06,264 INFO L93 Difference]: Finished difference Result 341 states and 362 transitions. [2020-10-27 14:20:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:20:06,264 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 169 [2020-10-27 14:20:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:06,266 INFO L225 Difference]: With dead ends: 341 [2020-10-27 14:20:06,266 INFO L226 Difference]: Without dead ends: 196 [2020-10-27 14:20:06,267 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 [2020-10-27 14:20:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-27 14:20:06,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 189. [2020-10-27 14:20:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-27 14:20:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 197 transitions. [2020-10-27 14:20:06,290 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 197 transitions. Word has length 169 [2020-10-27 14:20:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:06,292 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 197 transitions. [2020-10-27 14:20:06,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:20:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 197 transitions. [2020-10-27 14:20:06,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-27 14:20:06,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:06,299 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:06,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:20:06,299 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:06,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:06,300 INFO L82 PathProgramCache]: Analyzing trace with hash -170756224, now seen corresponding path program 11 times [2020-10-27 14:20:06,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:06,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692740199] [2020-10-27 14:20:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:06,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:11,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 14:20:11,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:11,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5398 [2020-10-27 14:20:11,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:20:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 14:20:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:20:11,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:11,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:11,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:11,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:11,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:11,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:20:11,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:11,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:11,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:11,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:11,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2020-10-27 14:20:11,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692740199] [2020-10-27 14:20:11,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:11,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:20:11,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742807670] [2020-10-27 14:20:11,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:20:11,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:11,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:20:11,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:20:11,970 INFO L87 Difference]: Start difference. First operand 189 states and 197 transitions. Second operand 15 states. [2020-10-27 14:20:12,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:12,531 INFO L93 Difference]: Finished difference Result 367 states and 388 transitions. [2020-10-27 14:20:12,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:20:12,532 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 183 [2020-10-27 14:20:12,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:12,534 INFO L225 Difference]: With dead ends: 367 [2020-10-27 14:20:12,535 INFO L226 Difference]: Without dead ends: 210 [2020-10-27 14:20:12,536 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 [2020-10-27 14:20:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-27 14:20:12,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2020-10-27 14:20:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-27 14:20:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 211 transitions. [2020-10-27 14:20:12,546 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 211 transitions. Word has length 183 [2020-10-27 14:20:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:12,546 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 211 transitions. [2020-10-27 14:20:12,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:20:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 211 transitions. [2020-10-27 14:20:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-27 14:20:12,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:12,549 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:12,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:20:12,549 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:12,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:12,550 INFO L82 PathProgramCache]: Analyzing trace with hash -291910382, now seen corresponding path program 12 times [2020-10-27 14:20:12,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:12,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078381457] [2020-10-27 14:20:12,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:12,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:12,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:12,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:12,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:12,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:18,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:18,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-27 14:20:18,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:18,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5527 [2020-10-27 14:20:18,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:18,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:20:18,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 14:20:18,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:20:18,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:18,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:18,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:18,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:18,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:18,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:18,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:18,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:18,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:18,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:18,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:18,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2020-10-27 14:20:18,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078381457] [2020-10-27 14:20:18,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:18,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:20:18,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364950306] [2020-10-27 14:20:18,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:20:18,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:18,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:20:18,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:20:18,372 INFO L87 Difference]: Start difference. First operand 203 states and 211 transitions. Second operand 16 states. [2020-10-27 14:20:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:19,031 INFO L93 Difference]: Finished difference Result 393 states and 414 transitions. [2020-10-27 14:20:19,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:20:19,032 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 197 [2020-10-27 14:20:19,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:19,035 INFO L225 Difference]: With dead ends: 393 [2020-10-27 14:20:19,035 INFO L226 Difference]: Without dead ends: 224 [2020-10-27 14:20:19,036 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 [2020-10-27 14:20:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-27 14:20:19,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2020-10-27 14:20:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-27 14:20:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 225 transitions. [2020-10-27 14:20:19,046 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 225 transitions. Word has length 197 [2020-10-27 14:20:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:19,046 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 225 transitions. [2020-10-27 14:20:19,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:20:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 225 transitions. [2020-10-27 14:20:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-27 14:20:19,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:19,049 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:19,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:20:19,050 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:19,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:19,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1906277156, now seen corresponding path program 13 times [2020-10-27 14:20:19,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:19,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104226248] [2020-10-27 14:20:19,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:19,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:19,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:19,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:19,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:19,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:24,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:24,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-27 14:20:24,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:24,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5185 [2020-10-27 14:20:24,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:24,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:20:24,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 14:20:24,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:20:24,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:24,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:24,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:24,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:24,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:24,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:24,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:20:24,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:24,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:24,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:24,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:24,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2020-10-27 14:20:24,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104226248] [2020-10-27 14:20:24,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:24,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:20:24,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940896554] [2020-10-27 14:20:24,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:20:24,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:24,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:20:24,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:20:24,515 INFO L87 Difference]: Start difference. First operand 217 states and 225 transitions. Second operand 17 states. [2020-10-27 14:20:25,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:25,212 INFO L93 Difference]: Finished difference Result 419 states and 440 transitions. [2020-10-27 14:20:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:20:25,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 211 [2020-10-27 14:20:25,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:25,215 INFO L225 Difference]: With dead ends: 419 [2020-10-27 14:20:25,215 INFO L226 Difference]: Without dead ends: 238 [2020-10-27 14:20:25,216 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 [2020-10-27 14:20:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-27 14:20:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 231. [2020-10-27 14:20:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-27 14:20:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 239 transitions. [2020-10-27 14:20:25,227 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 239 transitions. Word has length 211 [2020-10-27 14:20:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:25,227 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 239 transitions. [2020-10-27 14:20:25,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:20:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 239 transitions. [2020-10-27 14:20:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-27 14:20:25,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:25,231 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:25,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:20:25,231 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:25,232 INFO L82 PathProgramCache]: Analyzing trace with hash -944856650, now seen corresponding path program 14 times [2020-10-27 14:20:25,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:25,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225111851] [2020-10-27 14:20:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:25,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:25,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:25,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:25,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:25,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:30,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:30,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-27 14:20:30,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:30,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5208 [2020-10-27 14:20:30,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:30,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:20:30,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-27 14:20:30,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:20:30,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:30,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:30,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:30,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:30,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:30,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:30,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:30,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:30,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:30,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:30,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:30,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2020-10-27 14:20:30,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225111851] [2020-10-27 14:20:30,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:30,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:20:30,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130370020] [2020-10-27 14:20:30,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:20:30,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:30,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:20:30,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:20:30,807 INFO L87 Difference]: Start difference. First operand 231 states and 239 transitions. Second operand 18 states. [2020-10-27 14:20:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:31,530 INFO L93 Difference]: Finished difference Result 445 states and 466 transitions. [2020-10-27 14:20:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:20:31,531 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 225 [2020-10-27 14:20:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:31,534 INFO L225 Difference]: With dead ends: 445 [2020-10-27 14:20:31,534 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 14:20:31,535 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 [2020-10-27 14:20:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 14:20:31,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 245. [2020-10-27 14:20:31,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-27 14:20:31,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 253 transitions. [2020-10-27 14:20:31,546 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 253 transitions. Word has length 225 [2020-10-27 14:20:31,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:31,546 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 253 transitions. [2020-10-27 14:20:31,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:20:31,546 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 253 transitions. [2020-10-27 14:20:31,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-27 14:20:31,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:31,549 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:31,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:20:31,550 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:31,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:31,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2073714888, now seen corresponding path program 15 times [2020-10-27 14:20:31,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:31,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417995893] [2020-10-27 14:20:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:31,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:31,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:31,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:31,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:31,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:36,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:36,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-27 14:20:36,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:36,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5181 [2020-10-27 14:20:36,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:36,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:20:36,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-27 14:20:36,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:20:36,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:37,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:37,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:37,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:37,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:37,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:37,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:37,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:37,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:37,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:37,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:37,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-10-27 14:20:37,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417995893] [2020-10-27 14:20:37,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:37,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:20:37,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231454524] [2020-10-27 14:20:37,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:20:37,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:37,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:20:37,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:20:37,063 INFO L87 Difference]: Start difference. First operand 245 states and 253 transitions. Second operand 19 states. [2020-10-27 14:20:37,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:37,740 INFO L93 Difference]: Finished difference Result 471 states and 492 transitions. [2020-10-27 14:20:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:20:37,741 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 239 [2020-10-27 14:20:37,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:37,743 INFO L225 Difference]: With dead ends: 471 [2020-10-27 14:20:37,743 INFO L226 Difference]: Without dead ends: 266 [2020-10-27 14:20:37,744 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 [2020-10-27 14:20:37,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-27 14:20:37,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 259. [2020-10-27 14:20:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-27 14:20:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 267 transitions. [2020-10-27 14:20:37,760 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 267 transitions. Word has length 239 [2020-10-27 14:20:37,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:37,760 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 267 transitions. [2020-10-27 14:20:37,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:20:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 267 transitions. [2020-10-27 14:20:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-27 14:20:37,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:37,763 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:37,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:20:37,763 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:37,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:37,764 INFO L82 PathProgramCache]: Analyzing trace with hash 742250586, now seen corresponding path program 16 times [2020-10-27 14:20:37,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:37,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957571870] [2020-10-27 14:20:37,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:37,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:37,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:37,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:37,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:37,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:42,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:42,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-27 14:20:42,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:42,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:20:42,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:42,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:20:42,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 115 [2020-10-27 14:20:42,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:20:42,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:43,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:43,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:43,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:43,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:43,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:43,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:20:43,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:43,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:43,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:43,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:43,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1792 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2020-10-27 14:20:43,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957571870] [2020-10-27 14:20:43,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:43,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:20:43,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6563431] [2020-10-27 14:20:43,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:20:43,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:43,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:20:43,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:20:43,137 INFO L87 Difference]: Start difference. First operand 259 states and 267 transitions. Second operand 20 states. [2020-10-27 14:20:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:43,966 INFO L93 Difference]: Finished difference Result 497 states and 518 transitions. [2020-10-27 14:20:43,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:20:43,967 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 253 [2020-10-27 14:20:43,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:43,968 INFO L225 Difference]: With dead ends: 497 [2020-10-27 14:20:43,968 INFO L226 Difference]: Without dead ends: 280 [2020-10-27 14:20:43,969 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 [2020-10-27 14:20:43,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-27 14:20:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 273. [2020-10-27 14:20:43,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-27 14:20:43,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 281 transitions. [2020-10-27 14:20:43,985 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 281 transitions. Word has length 253 [2020-10-27 14:20:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:43,986 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 281 transitions. [2020-10-27 14:20:43,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:20:43,986 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 281 transitions. [2020-10-27 14:20:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-27 14:20:43,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:43,988 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:43,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:20:43,989 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:43,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:43,989 INFO L82 PathProgramCache]: Analyzing trace with hash -562288532, now seen corresponding path program 17 times [2020-10-27 14:20:43,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:43,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283481371] [2020-10-27 14:20:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:44,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:44,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:44,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:44,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:44,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:49,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:49,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-27 14:20:49,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:49,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-27 14:20:49,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:49,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:20:49,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-27 14:20:49,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:20:49,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:49,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:49,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:49,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:49,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:49,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:49,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:49,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:49,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:49,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:49,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:49,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1734 trivial. 0 not checked. [2020-10-27 14:20:49,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283481371] [2020-10-27 14:20:49,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:49,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:20:49,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857455715] [2020-10-27 14:20:49,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:20:49,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:49,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:20:49,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:20:49,545 INFO L87 Difference]: Start difference. First operand 273 states and 281 transitions. Second operand 21 states. [2020-10-27 14:20:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:50,372 INFO L93 Difference]: Finished difference Result 523 states and 544 transitions. [2020-10-27 14:20:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:20:50,372 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 267 [2020-10-27 14:20:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:50,374 INFO L225 Difference]: With dead ends: 523 [2020-10-27 14:20:50,374 INFO L226 Difference]: Without dead ends: 294 [2020-10-27 14:20:50,376 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 [2020-10-27 14:20:50,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-27 14:20:50,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 287. [2020-10-27 14:20:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-27 14:20:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 295 transitions. [2020-10-27 14:20:50,387 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 295 transitions. Word has length 267 [2020-10-27 14:20:50,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:50,388 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 295 transitions. [2020-10-27 14:20:50,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:20:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 295 transitions. [2020-10-27 14:20:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-27 14:20:50,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:50,390 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:50,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:20:50,391 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:50,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:50,391 INFO L82 PathProgramCache]: Analyzing trace with hash -817860354, now seen corresponding path program 18 times [2020-10-27 14:20:50,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:50,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457194642] [2020-10-27 14:20:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:50,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:50,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:50,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:50,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:50,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:55,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:55,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-27 14:20:55,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:55,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5400 [2020-10-27 14:20:55,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:55,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:20:55,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-27 14:20:55,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:20:55,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:56,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:56,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:56,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:56,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:56,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:56,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:56,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:56,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:56,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:56,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:56,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1944 trivial. 0 not checked. [2020-10-27 14:20:56,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457194642] [2020-10-27 14:20:56,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:56,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:20:56,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558634104] [2020-10-27 14:20:56,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:20:56,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:20:56,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:20:56,200 INFO L87 Difference]: Start difference. First operand 287 states and 295 transitions. Second operand 22 states. [2020-10-27 14:20:57,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:57,007 INFO L93 Difference]: Finished difference Result 549 states and 570 transitions. [2020-10-27 14:20:57,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:20:57,007 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 281 [2020-10-27 14:20:57,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:57,010 INFO L225 Difference]: With dead ends: 549 [2020-10-27 14:20:57,010 INFO L226 Difference]: Without dead ends: 308 [2020-10-27 14:20:57,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:20:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-27 14:20:57,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 301. [2020-10-27 14:20:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-27 14:20:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 309 transitions. [2020-10-27 14:20:57,024 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 309 transitions. Word has length 281 [2020-10-27 14:20:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:57,024 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 309 transitions. [2020-10-27 14:20:57,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:20:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 309 transitions. [2020-10-27 14:20:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-27 14:20:57,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:57,027 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:57,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:20:57,027 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:57,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:57,028 INFO L82 PathProgramCache]: Analyzing trace with hash -981609968, now seen corresponding path program 19 times [2020-10-27 14:20:57,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:57,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314761450] [2020-10-27 14:20:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:57,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:57,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:57,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:57,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:57,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:02,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:02,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 305 [2020-10-27 14:21:02,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:02,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5444 [2020-10-27 14:21:02,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:02,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:21:02,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-27 14:21:02,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:21:02,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:02,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:02,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:02,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:02,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:02,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:02,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:02,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:02,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:02,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:02,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:02,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2527 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2166 trivial. 0 not checked. [2020-10-27 14:21:02,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314761450] [2020-10-27 14:21:02,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:02,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:21:02,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589614035] [2020-10-27 14:21:02,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:21:02,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:02,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:21:02,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:21:02,978 INFO L87 Difference]: Start difference. First operand 301 states and 309 transitions. Second operand 23 states. [2020-10-27 14:21:03,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:03,936 INFO L93 Difference]: Finished difference Result 575 states and 596 transitions. [2020-10-27 14:21:03,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:21:03,937 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 295 [2020-10-27 14:21:03,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:03,939 INFO L225 Difference]: With dead ends: 575 [2020-10-27 14:21:03,939 INFO L226 Difference]: Without dead ends: 322 [2020-10-27 14:21:03,941 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 [2020-10-27 14:21:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-27 14:21:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 315. [2020-10-27 14:21:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-27 14:21:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 323 transitions. [2020-10-27 14:21:03,953 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 323 transitions. Word has length 295 [2020-10-27 14:21:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:03,954 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 323 transitions. [2020-10-27 14:21:03,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:21:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 323 transitions. [2020-10-27 14:21:03,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-27 14:21:03,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:03,956 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:03,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:21:03,957 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:03,957 INFO L82 PathProgramCache]: Analyzing trace with hash -466654302, now seen corresponding path program 20 times [2020-10-27 14:21:03,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:03,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670046236] [2020-10-27 14:21:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:03,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:04,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:04,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:04,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:04,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:09,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:09,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 319 [2020-10-27 14:21:09,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:09,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5568 [2020-10-27 14:21:09,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:09,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:21:09,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-27 14:21:09,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:21:09,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:10,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:10,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:10,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:10,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:10,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:10,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:21:10,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:10,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:10,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:10,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:10,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-27 14:21:10,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670046236] [2020-10-27 14:21:10,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:10,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:21:10,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798765951] [2020-10-27 14:21:10,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:21:10,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:10,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:21:10,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:21:10,220 INFO L87 Difference]: Start difference. First operand 315 states and 323 transitions. Second operand 24 states. [2020-10-27 14:21:11,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:11,258 INFO L93 Difference]: Finished difference Result 601 states and 622 transitions. [2020-10-27 14:21:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:21:11,259 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 309 [2020-10-27 14:21:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:11,261 INFO L225 Difference]: With dead ends: 601 [2020-10-27 14:21:11,262 INFO L226 Difference]: Without dead ends: 336 [2020-10-27 14:21:11,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:21:11,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-27 14:21:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 329. [2020-10-27 14:21:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-27 14:21:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 337 transitions. [2020-10-27 14:21:11,279 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 337 transitions. Word has length 309 [2020-10-27 14:21:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:11,282 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 337 transitions. [2020-10-27 14:21:11,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:21:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 337 transitions. [2020-10-27 14:21:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-27 14:21:11,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:11,284 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:11,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:21:11,285 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:11,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:11,285 INFO L82 PathProgramCache]: Analyzing trace with hash -61317708, now seen corresponding path program 21 times [2020-10-27 14:21:11,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:11,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183642482] [2020-10-27 14:21:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:11,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:11,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:11,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:11,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:11,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:16,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:16,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-27 14:21:16,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:16,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 14:21:16,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:16,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:21:16,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-27 14:21:16,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:21:16,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:16,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:16,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:16,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:16,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:16,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:16,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:16,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:16,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:16,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:16,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:16,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:21:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3087 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2646 trivial. 0 not checked. [2020-10-27 14:21:17,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183642482] [2020-10-27 14:21:17,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:17,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:21:17,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30577866] [2020-10-27 14:21:17,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:21:17,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:17,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:21:17,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:21:17,044 INFO L87 Difference]: Start difference. First operand 329 states and 337 transitions. Second operand 25 states. [2020-10-27 14:21:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:17,892 INFO L93 Difference]: Finished difference Result 627 states and 648 transitions. [2020-10-27 14:21:17,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:21:17,896 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 323 [2020-10-27 14:21:17,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:17,898 INFO L225 Difference]: With dead ends: 627 [2020-10-27 14:21:17,898 INFO L226 Difference]: Without dead ends: 350 [2020-10-27 14:21:17,899 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 [2020-10-27 14:21:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-10-27 14:21:17,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 343. [2020-10-27 14:21:17,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-27 14:21:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 351 transitions. [2020-10-27 14:21:17,912 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 351 transitions. Word has length 323 [2020-10-27 14:21:17,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:17,913 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 351 transitions. [2020-10-27 14:21:17,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:21:17,913 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 351 transitions. [2020-10-27 14:21:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-27 14:21:17,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:17,916 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:17,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:21:17,916 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:17,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1594083398, now seen corresponding path program 22 times [2020-10-27 14:21:17,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:17,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805242589] [2020-10-27 14:21:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:17,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:18,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:18,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:18,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:18,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:23,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:23,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-27 14:21:23,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:23,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5781 [2020-10-27 14:21:23,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:23,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:21:23,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-27 14:21:23,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:21:23,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:24,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:24,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:24,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:24,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:24,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:24,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:24,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:24,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:24,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:24,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:24,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2904 trivial. 0 not checked. [2020-10-27 14:21:24,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805242589] [2020-10-27 14:21:24,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:24,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:21:24,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689638192] [2020-10-27 14:21:24,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:21:24,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:24,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:21:24,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:21:24,298 INFO L87 Difference]: Start difference. First operand 343 states and 351 transitions. Second operand 26 states. [2020-10-27 14:21:25,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:25,318 INFO L93 Difference]: Finished difference Result 653 states and 674 transitions. [2020-10-27 14:21:25,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:21:25,319 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 337 [2020-10-27 14:21:25,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:25,321 INFO L225 Difference]: With dead ends: 653 [2020-10-27 14:21:25,321 INFO L226 Difference]: Without dead ends: 364 [2020-10-27 14:21:25,323 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 [2020-10-27 14:21:25,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-27 14:21:25,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 357. [2020-10-27 14:21:25,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-27 14:21:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 365 transitions. [2020-10-27 14:21:25,335 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 365 transitions. Word has length 337 [2020-10-27 14:21:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:25,335 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 365 transitions. [2020-10-27 14:21:25,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:21:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 365 transitions. [2020-10-27 14:21:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-27 14:21:25,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:25,338 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:25,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:21:25,338 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:25,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:25,339 INFO L82 PathProgramCache]: Analyzing trace with hash 793037656, now seen corresponding path program 23 times [2020-10-27 14:21:25,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:25,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546668733] [2020-10-27 14:21:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:25,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:25,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:25,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:25,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:25,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:32,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:32,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-27 14:21:32,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:32,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7474 [2020-10-27 14:21:32,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:32,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:21:32,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-27 14:21:32,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:21:32,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:33,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:33,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:33,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:33,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:33,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:33,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:33,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:33,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:33,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:33,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:33,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3703 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3174 trivial. 0 not checked. [2020-10-27 14:21:33,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546668733] [2020-10-27 14:21:33,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:33,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:21:33,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418711633] [2020-10-27 14:21:33,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:21:33,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:33,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:21:33,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:33,521 INFO L87 Difference]: Start difference. First operand 357 states and 365 transitions. Second operand 27 states. [2020-10-27 14:21:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:34,615 INFO L93 Difference]: Finished difference Result 679 states and 700 transitions. [2020-10-27 14:21:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:21:34,615 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 351 [2020-10-27 14:21:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:34,618 INFO L225 Difference]: With dead ends: 679 [2020-10-27 14:21:34,618 INFO L226 Difference]: Without dead ends: 378 [2020-10-27 14:21:34,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-27 14:21:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 371. [2020-10-27 14:21:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-27 14:21:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 379 transitions. [2020-10-27 14:21:34,632 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 379 transitions. Word has length 351 [2020-10-27 14:21:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:34,633 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 379 transitions. [2020-10-27 14:21:34,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:21:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 379 transitions. [2020-10-27 14:21:34,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-27 14:21:34,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:34,636 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:34,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:21:34,636 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:34,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:34,637 INFO L82 PathProgramCache]: Analyzing trace with hash 875988714, now seen corresponding path program 24 times [2020-10-27 14:21:34,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:34,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243817100] [2020-10-27 14:21:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:34,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:34,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:34,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:34,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:35,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:46,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:46,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-10-27 14:21:46,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:46,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11583 [2020-10-27 14:21:46,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:21:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-27 14:21:46,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:21:46,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:46,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:46,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:46,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:46,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:46,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:46,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:46,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:46,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:46,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:46,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:46,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3456 trivial. 0 not checked. [2020-10-27 14:21:46,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243817100] [2020-10-27 14:21:46,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:46,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:21:46,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820948684] [2020-10-27 14:21:46,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:21:46,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:46,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:21:46,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:21:46,968 INFO L87 Difference]: Start difference. First operand 371 states and 379 transitions. Second operand 28 states. [2020-10-27 14:21:48,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:48,089 INFO L93 Difference]: Finished difference Result 705 states and 726 transitions. [2020-10-27 14:21:48,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:21:48,090 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 365 [2020-10-27 14:21:48,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:48,093 INFO L225 Difference]: With dead ends: 705 [2020-10-27 14:21:48,093 INFO L226 Difference]: Without dead ends: 392 [2020-10-27 14:21:48,094 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 [2020-10-27 14:21:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-27 14:21:48,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 385. [2020-10-27 14:21:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-27 14:21:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 393 transitions. [2020-10-27 14:21:48,107 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 393 transitions. Word has length 365 [2020-10-27 14:21:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:48,107 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 393 transitions. [2020-10-27 14:21:48,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:21:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 393 transitions. [2020-10-27 14:21:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2020-10-27 14:21:48,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:48,110 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:48,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:21:48,111 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:48,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:48,111 INFO L82 PathProgramCache]: Analyzing trace with hash 721165052, now seen corresponding path program 25 times [2020-10-27 14:21:48,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:48,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564500465] [2020-10-27 14:21:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:48,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:48,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:48,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:48,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:48,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:56,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:56,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 389 [2020-10-27 14:21:56,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:56,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8014 [2020-10-27 14:21:56,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:56,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:21:56,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-27 14:21:56,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:21:56,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:56,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:56,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:56,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:56,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:56,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:56,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:56,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:56,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:56,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3750 trivial. 0 not checked. [2020-10-27 14:21:56,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564500465] [2020-10-27 14:21:56,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:56,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:21:56,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482474385] [2020-10-27 14:21:56,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:21:56,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:56,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:21:56,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:21:56,910 INFO L87 Difference]: Start difference. First operand 385 states and 393 transitions. Second operand 29 states. [2020-10-27 14:21:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:58,054 INFO L93 Difference]: Finished difference Result 731 states and 752 transitions. [2020-10-27 14:21:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:21:58,055 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 379 [2020-10-27 14:21:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:58,057 INFO L225 Difference]: With dead ends: 731 [2020-10-27 14:21:58,057 INFO L226 Difference]: Without dead ends: 406 [2020-10-27 14:21:58,059 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 [2020-10-27 14:21:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-27 14:21:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 399. [2020-10-27 14:21:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-27 14:21:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 407 transitions. [2020-10-27 14:21:58,071 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 407 transitions. Word has length 379 [2020-10-27 14:21:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:58,071 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 407 transitions. [2020-10-27 14:21:58,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:21:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 407 transitions. [2020-10-27 14:21:58,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-27 14:21:58,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:58,074 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:58,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:21:58,074 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1732204658, now seen corresponding path program 26 times [2020-10-27 14:21:58,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:58,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151117240] [2020-10-27 14:21:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:58,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:58,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:58,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:58,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:58,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:05,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:05,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 403 [2020-10-27 14:22:05,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:05,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6945 [2020-10-27 14:22:05,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:05,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:22:05,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-10-27 14:22:05,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:22:05,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:05,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:05,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:05,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:05,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:05,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:05,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:05,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:05,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:05,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:05,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:05,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4056 trivial. 0 not checked. [2020-10-27 14:22:05,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151117240] [2020-10-27 14:22:05,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:05,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:22:05,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376903878] [2020-10-27 14:22:05,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:22:05,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:05,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:22:05,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:22:05,822 INFO L87 Difference]: Start difference. First operand 399 states and 407 transitions. Second operand 30 states. [2020-10-27 14:22:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:06,996 INFO L93 Difference]: Finished difference Result 757 states and 778 transitions. [2020-10-27 14:22:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:22:06,997 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 393 [2020-10-27 14:22:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:07,000 INFO L225 Difference]: With dead ends: 757 [2020-10-27 14:22:07,000 INFO L226 Difference]: Without dead ends: 420 [2020-10-27 14:22:07,001 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 [2020-10-27 14:22:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-10-27 14:22:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 413. [2020-10-27 14:22:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2020-10-27 14:22:07,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 421 transitions. [2020-10-27 14:22:07,011 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 421 transitions. Word has length 393 [2020-10-27 14:22:07,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:07,011 INFO L481 AbstractCegarLoop]: Abstraction has 413 states and 421 transitions. [2020-10-27 14:22:07,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:22:07,011 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 421 transitions. [2020-10-27 14:22:07,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-10-27 14:22:07,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:07,014 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:07,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:22:07,015 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:07,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:07,015 INFO L82 PathProgramCache]: Analyzing trace with hash 481774752, now seen corresponding path program 27 times [2020-10-27 14:22:07,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:07,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408868823] [2020-10-27 14:22:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:07,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:07,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:07,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:07,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:07,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:16,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:16,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-10-27 14:22:16,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:16,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9257 [2020-10-27 14:22:16,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:16,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:22:16,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-27 14:22:16,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:22:16,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:17,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:17,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:17,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:17,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:17,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:17,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:17,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:17,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:17,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5103 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 4374 trivial. 0 not checked. [2020-10-27 14:22:17,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408868823] [2020-10-27 14:22:17,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:17,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:22:17,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452819641] [2020-10-27 14:22:17,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:22:17,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:17,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:22:17,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:22:17,148 INFO L87 Difference]: Start difference. First operand 413 states and 421 transitions. Second operand 31 states. [2020-10-27 14:22:18,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:18,599 INFO L93 Difference]: Finished difference Result 783 states and 804 transitions. [2020-10-27 14:22:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:22:18,599 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 407 [2020-10-27 14:22:18,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:18,602 INFO L225 Difference]: With dead ends: 783 [2020-10-27 14:22:18,602 INFO L226 Difference]: Without dead ends: 434 [2020-10-27 14:22:18,603 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 [2020-10-27 14:22:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-27 14:22:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 427. [2020-10-27 14:22:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-27 14:22:18,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 435 transitions. [2020-10-27 14:22:18,614 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 435 transitions. Word has length 407 [2020-10-27 14:22:18,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:18,614 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 435 transitions. [2020-10-27 14:22:18,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:22:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 435 transitions. [2020-10-27 14:22:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-10-27 14:22:18,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:18,618 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:18,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:22:18,618 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:18,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:18,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1109076530, now seen corresponding path program 28 times [2020-10-27 14:22:18,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:18,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090047277] [2020-10-27 14:22:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:18,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:18,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:18,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:18,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:19,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:24,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:24,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 431 [2020-10-27 14:22:24,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:24,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5485 [2020-10-27 14:22:24,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:24,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:22:24,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-27 14:22:24,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:22:24,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:24,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:24,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:24,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:24,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:24,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:24,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:24,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:24,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:24,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:24,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:24,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5488 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-10-27 14:22:24,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090047277] [2020-10-27 14:22:24,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:24,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:22:24,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872466176] [2020-10-27 14:22:24,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:22:24,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:24,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:22:24,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:22:24,927 INFO L87 Difference]: Start difference. First operand 427 states and 435 transitions. Second operand 32 states. [2020-10-27 14:22:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:26,424 INFO L93 Difference]: Finished difference Result 809 states and 830 transitions. [2020-10-27 14:22:26,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:22:26,425 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 421 [2020-10-27 14:22:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:26,428 INFO L225 Difference]: With dead ends: 809 [2020-10-27 14:22:26,428 INFO L226 Difference]: Without dead ends: 448 [2020-10-27 14:22:26,430 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 [2020-10-27 14:22:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-27 14:22:26,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 441. [2020-10-27 14:22:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-27 14:22:26,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 449 transitions. [2020-10-27 14:22:26,442 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 449 transitions. Word has length 421 [2020-10-27 14:22:26,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:26,442 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 449 transitions. [2020-10-27 14:22:26,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:22:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 449 transitions. [2020-10-27 14:22:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-10-27 14:22:26,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:26,446 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:26,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:22:26,447 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:26,447 INFO L82 PathProgramCache]: Analyzing trace with hash -768647100, now seen corresponding path program 29 times [2020-10-27 14:22:26,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:26,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817206084] [2020-10-27 14:22:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:26,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:26,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:26,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:26,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:27,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:32,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:32,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 445 [2020-10-27 14:22:32,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:32,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5757 [2020-10-27 14:22:32,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:32,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:22:32,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-27 14:22:32,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:22:32,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:33,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:33,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:33,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:33,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:33,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:33,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:33,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:33,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:33,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:33,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:33,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5887 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5046 trivial. 0 not checked. [2020-10-27 14:22:33,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817206084] [2020-10-27 14:22:33,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:33,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:22:33,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113726714] [2020-10-27 14:22:33,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:22:33,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:33,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:22:33,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:22:33,134 INFO L87 Difference]: Start difference. First operand 441 states and 449 transitions. Second operand 33 states. [2020-10-27 14:22:34,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:34,650 INFO L93 Difference]: Finished difference Result 835 states and 856 transitions. [2020-10-27 14:22:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:22:34,650 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 435 [2020-10-27 14:22:34,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:34,654 INFO L225 Difference]: With dead ends: 835 [2020-10-27 14:22:34,654 INFO L226 Difference]: Without dead ends: 462 [2020-10-27 14:22:34,658 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 [2020-10-27 14:22:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-10-27 14:22:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 455. [2020-10-27 14:22:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-27 14:22:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 463 transitions. [2020-10-27 14:22:34,672 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 463 transitions. Word has length 435 [2020-10-27 14:22:34,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:34,672 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 463 transitions. [2020-10-27 14:22:34,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:22:34,673 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 463 transitions. [2020-10-27 14:22:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-10-27 14:22:34,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:34,676 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:34,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:22:34,677 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:34,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:34,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1505816874, now seen corresponding path program 30 times [2020-10-27 14:22:34,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:34,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242289246] [2020-10-27 14:22:34,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:34,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:34,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:34,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:35,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:35,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:41,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:41,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 459 [2020-10-27 14:22:41,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:41,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6856 [2020-10-27 14:22:41,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:41,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:22:41,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 199 [2020-10-27 14:22:41,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:22:41,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:42,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:42,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:42,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:42,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:42,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:42,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:42,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:42,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:42,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6300 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5400 trivial. 0 not checked. [2020-10-27 14:22:42,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242289246] [2020-10-27 14:22:42,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:42,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:22:42,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897140020] [2020-10-27 14:22:42,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:22:42,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:42,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:22:42,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:22:42,534 INFO L87 Difference]: Start difference. First operand 455 states and 463 transitions. Second operand 34 states.