/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:51:12,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:51:12,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:51:12,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:51:12,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:51:12,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:51:12,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:51:12,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:51:12,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:51:12,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:51:12,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:51:12,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:51:12,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:51:12,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:51:12,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:51:12,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:51:12,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:51:12,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:51:12,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:51:12,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:51:12,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:51:12,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:51:12,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:51:12,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:51:12,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:51:12,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:51:12,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:51:12,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:51:12,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:51:12,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:51:12,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:51:12,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:51:12,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:51:12,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:51:12,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:51:12,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:51:12,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:51:12,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:51:12,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:51:12,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:51:12,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:51:12,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 08:51:12,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:51:12,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:51:12,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:51:12,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:51:12,211 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:51:12,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:51:12,211 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:51:12,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:51:12,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:51:12,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:51:12,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:51:12,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:51:12,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:51:12,213 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:51:12,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:51:12,214 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:51:12,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:51:12,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:51:12,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:51:12,215 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:51:12,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:51:12,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:51:12,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:51:12,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:51:12,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:51:12,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:51:12,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:51:12,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:51:12,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:51:12,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:51:12,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:51:12,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:51:12,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:51:12,728 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:51:12,729 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:51:12,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2020-10-28 08:51:12,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b003dc30/ea11e93b73244e6393966c457f0a1e1c/FLAGbe267143f [2020-10-28 08:51:13,515 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:51:13,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2020-10-28 08:51:13,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b003dc30/ea11e93b73244e6393966c457f0a1e1c/FLAGbe267143f [2020-10-28 08:51:13,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b003dc30/ea11e93b73244e6393966c457f0a1e1c [2020-10-28 08:51:13,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:51:13,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:51:13,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:13,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:51:13,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:51:13,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:13" (1/1) ... [2020-10-28 08:51:13,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19bd63e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:13, skipping insertion in model container [2020-10-28 08:51:13,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:51:13" (1/1) ... [2020-10-28 08:51:13,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:51:13,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:51:14,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:14,066 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:51:14,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:51:14,110 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:51:14,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:14 WrapperNode [2020-10-28 08:51:14,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:51:14,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:51:14,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:51:14,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:51:14,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:14" (1/1) ... [2020-10-28 08:51:14,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:14" (1/1) ... [2020-10-28 08:51:14,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:14" (1/1) ... [2020-10-28 08:51:14,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:14" (1/1) ... [2020-10-28 08:51:14,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:14" (1/1) ... [2020-10-28 08:51:14,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:14" (1/1) ... [2020-10-28 08:51:14,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:14" (1/1) ... [2020-10-28 08:51:14,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:51:14,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:51:14,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:51:14,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:51:14,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:51:14,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:51:14,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:51:14,256 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:51:14,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:51:14,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:51:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:51:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:51:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:51:14,257 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:51:14,258 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:51:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:51:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:51:14,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:51:14,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:51:14,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:51:14,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:51:14,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:51:14,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:51:14,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:51:14,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:51:14,878 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:51:14,878 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 08:51:14,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:14 BoogieIcfgContainer [2020-10-28 08:51:14,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:51:14,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:51:14,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:51:14,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:51:14,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:51:13" (1/3) ... [2020-10-28 08:51:14,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc02e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:14, skipping insertion in model container [2020-10-28 08:51:14,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:51:14" (2/3) ... [2020-10-28 08:51:14,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc02e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:51:14, skipping insertion in model container [2020-10-28 08:51:14,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:51:14" (3/3) ... [2020-10-28 08:51:14,898 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-2.i [2020-10-28 08:51:14,933 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:51:14,940 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:51:14,955 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:51:15,005 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:51:15,006 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:51:15,006 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:51:15,006 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:51:15,007 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:51:15,007 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:51:15,007 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:51:15,007 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:51:15,037 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-28 08:51:15,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 08:51:15,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:15,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:15,049 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:15,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1906025394, now seen corresponding path program 1 times [2020-10-28 08:51:15,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:15,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751748791] [2020-10-28 08:51:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:15,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:15,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 08:51:15,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:15,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-28 08:51:15,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:15,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:15,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:15,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 08:51:15,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:15,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:51:15,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:15,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:15,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:15,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:15,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 08:51:15,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:15,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:15,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:15,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:15,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:15,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:15,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751748791] [2020-10-28 08:51:15,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:15,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:51:15,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588816758] [2020-10-28 08:51:15,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:51:15,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:15,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:51:15,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:51:15,655 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-28 08:51:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:15,784 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-28 08:51:15,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:51:15,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-28 08:51:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:15,796 INFO L225 Difference]: With dead ends: 53 [2020-10-28 08:51:15,796 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 08:51:15,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:51:15,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 08:51:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 08:51:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 08:51:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-28 08:51:15,845 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2020-10-28 08:51:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:15,846 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-28 08:51:15,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:51:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-28 08:51:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 08:51:15,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:15,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:15,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:51:15,848 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:15,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1754426942, now seen corresponding path program 1 times [2020-10-28 08:51:15,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:15,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982405967] [2020-10-28 08:51:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:15,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:15,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:16,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:16,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 08:51:16,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:16,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-28 08:51:16,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:16,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:16,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:16,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 08:51:16,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:16,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:16,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:16,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:16,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:16,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:16,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:16,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 08:51:16,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:16,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:16,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:16,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:16,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:16,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:16,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982405967] [2020-10-28 08:51:16,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:16,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:16,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539678694] [2020-10-28 08:51:16,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:16,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:16,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:16,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:16,348 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2020-10-28 08:51:16,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:16,517 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-28 08:51:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:16,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 08:51:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:16,519 INFO L225 Difference]: With dead ends: 39 [2020-10-28 08:51:16,520 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 08:51:16,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 08:51:16,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-28 08:51:16,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 08:51:16,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-28 08:51:16,530 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2020-10-28 08:51:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:16,531 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-28 08:51:16,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:16,531 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-28 08:51:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 08:51:16,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:16,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:16,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:51:16,532 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:16,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:16,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1373994528, now seen corresponding path program 1 times [2020-10-28 08:51:16,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:16,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167452525] [2020-10-28 08:51:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:16,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:16,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:16,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:16,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 08:51:16,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:16,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-28 08:51:16,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:16,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 08:51:16,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:51:16,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:16,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:16,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:16,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:16,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:16,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:16,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 08:51:16,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:16,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:16,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:16,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:16,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:16,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:51:16,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167452525] [2020-10-28 08:51:16,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:16,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:51:16,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35603888] [2020-10-28 08:51:16,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:16,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:16,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:16,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:16,910 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-10-28 08:51:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:17,050 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-28 08:51:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:17,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 08:51:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:17,052 INFO L225 Difference]: With dead ends: 41 [2020-10-28 08:51:17,052 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 08:51:17,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:17,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 08:51:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-28 08:51:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 08:51:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-28 08:51:17,060 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-10-28 08:51:17,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:17,061 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-28 08:51:17,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:17,061 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-28 08:51:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:51:17,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:17,062 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:17,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:51:17,062 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:17,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:17,063 INFO L82 PathProgramCache]: Analyzing trace with hash -850664834, now seen corresponding path program 2 times [2020-10-28 08:51:17,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:17,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340907311] [2020-10-28 08:51:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:17,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:17,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:51:17,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:17,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-10-28 08:51:17,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:17,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:17,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:51:17,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:17,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:51:17,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:17,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:17,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:17,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:17,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:17,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:51:17,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:17,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:17,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:17,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:17,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:17,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:51:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:17,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340907311] [2020-10-28 08:51:17,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:51:17,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:51:17,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657778154] [2020-10-28 08:51:17,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:51:17,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:17,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:51:17,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:17,514 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 4 states. [2020-10-28 08:51:17,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:17,646 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-28 08:51:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:51:17,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 08:51:17,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:17,648 INFO L225 Difference]: With dead ends: 48 [2020-10-28 08:51:17,648 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 08:51:17,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:51:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 08:51:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-28 08:51:17,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 08:51:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-28 08:51:17,655 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-10-28 08:51:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:17,656 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-28 08:51:17,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:51:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-28 08:51:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 08:51:17,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:17,657 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:17,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:51:17,657 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:17,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:17,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1873587236, now seen corresponding path program 1 times [2020-10-28 08:51:17,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:17,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813054687] [2020-10-28 08:51:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:17,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:17,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:17,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 08:51:17,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:17,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-28 08:51:17,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:17,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 08:51:17,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:17,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 14 [2020-10-28 08:51:18,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:18,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:18,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:18,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:18,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:18,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:18,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:18,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:18,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:18,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:18,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:18,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 08:51:18,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813054687] [2020-10-28 08:51:18,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:18,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:18,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091267294] [2020-10-28 08:51:18,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:18,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:18,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:18,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:18,029 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-28 08:51:18,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:18,183 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-28 08:51:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:18,184 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-28 08:51:18,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:18,186 INFO L225 Difference]: With dead ends: 44 [2020-10-28 08:51:18,186 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 08:51:18,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 08:51:18,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-28 08:51:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 08:51:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-28 08:51:18,211 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-10-28 08:51:18,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:18,212 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-28 08:51:18,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:18,212 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-28 08:51:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 08:51:18,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:18,215 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:18,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:51:18,219 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:18,220 INFO L82 PathProgramCache]: Analyzing trace with hash 77079930, now seen corresponding path program 2 times [2020-10-28 08:51:18,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:18,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710485208] [2020-10-28 08:51:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:18,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:18,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:18,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:18,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 08:51:18,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:18,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-10-28 08:51:18,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:18,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:18,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:51:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:51:18,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:18,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:18,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:18,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:18,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:18,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:18,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:18,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:18,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:18,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:51:18,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710485208] [2020-10-28 08:51:18,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:18,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:51:18,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641390262] [2020-10-28 08:51:18,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:51:18,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:18,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:51:18,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:18,815 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-10-28 08:51:18,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:18,938 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-10-28 08:51:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:51:18,939 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-28 08:51:18,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:18,940 INFO L225 Difference]: With dead ends: 54 [2020-10-28 08:51:18,940 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 08:51:18,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:51:18,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 08:51:18,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 08:51:18,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 08:51:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-28 08:51:18,949 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2020-10-28 08:51:18,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:18,949 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-28 08:51:18,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:51:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-28 08:51:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 08:51:18,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:18,950 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:18,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:51:18,951 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:18,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:18,952 INFO L82 PathProgramCache]: Analyzing trace with hash 699119576, now seen corresponding path program 3 times [2020-10-28 08:51:18,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:18,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630023775] [2020-10-28 08:51:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:18,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:18,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:19,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:19,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 08:51:19,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:19,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-28 08:51:19,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:19,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:19,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:19,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:19,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:51:19,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:19,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:19,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:19,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:19,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:19,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:19,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:19,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:19,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:19,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:19,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:19,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:19,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:19,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630023775] [2020-10-28 08:51:19,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:19,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:19,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798019443] [2020-10-28 08:51:19,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:19,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:19,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:19,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:19,646 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-10-28 08:51:19,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:19,812 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-10-28 08:51:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:51:19,813 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-28 08:51:19,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:19,814 INFO L225 Difference]: With dead ends: 48 [2020-10-28 08:51:19,814 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 08:51:19,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 08:51:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-28 08:51:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 08:51:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-28 08:51:19,830 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2020-10-28 08:51:19,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:19,831 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-28 08:51:19,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:19,831 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-28 08:51:19,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:51:19,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:19,834 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:19,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:51:19,835 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:19,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1452836234, now seen corresponding path program 4 times [2020-10-28 08:51:19,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:19,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859427953] [2020-10-28 08:51:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:19,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:19,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:20,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:51:20,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:20,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-10-28 08:51:20,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:20,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:20,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:20,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:51:20,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:51:20,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:20,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:20,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:20,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:20,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:20,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:20,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:20,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:20,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:20,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:20,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:20,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 08:51:20,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859427953] [2020-10-28 08:51:20,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:20,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:20,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762680609] [2020-10-28 08:51:20,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:20,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:20,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:20,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:20,761 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 8 states. [2020-10-28 08:51:20,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:20,859 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-28 08:51:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:20,860 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-28 08:51:20,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:20,861 INFO L225 Difference]: With dead ends: 50 [2020-10-28 08:51:20,861 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 08:51:20,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 08:51:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-28 08:51:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 08:51:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-28 08:51:20,868 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2020-10-28 08:51:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:20,868 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-28 08:51:20,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-28 08:51:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 08:51:20,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:20,869 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:20,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:51:20,870 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:20,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:20,870 INFO L82 PathProgramCache]: Analyzing trace with hash 691867028, now seen corresponding path program 5 times [2020-10-28 08:51:20,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:20,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849023457] [2020-10-28 08:51:20,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:20,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:20,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:21,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:21,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 08:51:21,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:21,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 969 [2020-10-28 08:51:21,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:21,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:51:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:51:21,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:21,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:21,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:21,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:21,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:21,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:21,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:21,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:21,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:21,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:21,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:21,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:21,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:51:21,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849023457] [2020-10-28 08:51:21,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:21,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:51:21,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227563501] [2020-10-28 08:51:21,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:51:21,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:21,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:51:21,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:21,947 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 6 states. [2020-10-28 08:51:22,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:22,069 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-10-28 08:51:22,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:51:22,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-28 08:51:22,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:22,071 INFO L225 Difference]: With dead ends: 64 [2020-10-28 08:51:22,071 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 08:51:22,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:51:22,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 08:51:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-28 08:51:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 08:51:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-28 08:51:22,077 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2020-10-28 08:51:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:22,078 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-28 08:51:22,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:51:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-28 08:51:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 08:51:22,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:22,079 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:22,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:51:22,079 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:22,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:22,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1369120398, now seen corresponding path program 6 times [2020-10-28 08:51:22,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:22,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494746627] [2020-10-28 08:51:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:22,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:22,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:23,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:23,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 08:51:23,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:23,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1425 [2020-10-28 08:51:23,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:23,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:23,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:51:23,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:51:23,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:51:23,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:23,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:23,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:23,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:23,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:23,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:23,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:23,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:23,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:23,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:51:23,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494746627] [2020-10-28 08:51:23,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:23,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:51:23,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160554619] [2020-10-28 08:51:23,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:51:23,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:23,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:51:23,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:23,639 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 9 states. [2020-10-28 08:51:23,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:23,759 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-28 08:51:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:51:23,760 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-28 08:51:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:23,761 INFO L225 Difference]: With dead ends: 54 [2020-10-28 08:51:23,761 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 08:51:23,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:23,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 08:51:23,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-28 08:51:23,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 08:51:23,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-28 08:51:23,768 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-10-28 08:51:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:23,768 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-28 08:51:23,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:51:23,775 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-28 08:51:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 08:51:23,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:23,777 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:23,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:51:23,777 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:23,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:23,778 INFO L82 PathProgramCache]: Analyzing trace with hash -461593200, now seen corresponding path program 7 times [2020-10-28 08:51:23,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:23,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234049824] [2020-10-28 08:51:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:23,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:23,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:25,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 08:51:25,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:25,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1646 [2020-10-28 08:51:25,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:25,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:25,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:51:25,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 08:51:25,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:51:25,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:25,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:25,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:25,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:25,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:25,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:25,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:25,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:25,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:25,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:25,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:25,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:51:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 08:51:25,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234049824] [2020-10-28 08:51:25,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:25,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:51:25,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608570729] [2020-10-28 08:51:25,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:51:25,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:25,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:51:25,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:25,599 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 10 states. [2020-10-28 08:51:25,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:25,743 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-10-28 08:51:25,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:51:25,743 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-28 08:51:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:25,744 INFO L225 Difference]: With dead ends: 56 [2020-10-28 08:51:25,744 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 08:51:25,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:25,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 08:51:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-28 08:51:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:51:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-28 08:51:25,753 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 35 [2020-10-28 08:51:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:25,754 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-28 08:51:25,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:51:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-28 08:51:25,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 08:51:25,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:25,755 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:25,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:51:25,755 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:25,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:25,756 INFO L82 PathProgramCache]: Analyzing trace with hash -206317010, now seen corresponding path program 8 times [2020-10-28 08:51:25,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:25,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248722792] [2020-10-28 08:51:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:25,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:25,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:27,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:27,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 08:51:27,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:27,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1831 [2020-10-28 08:51:27,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:27,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:27,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:51:27,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:27,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:51:27,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:27,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:27,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:27,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:27,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:27,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:27,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:51:27,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:27,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:27,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:27,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:27,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:27,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 08:51:27,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248722792] [2020-10-28 08:51:27,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:27,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:51:27,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884724485] [2020-10-28 08:51:27,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:51:27,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:27,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:51:27,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:27,708 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 7 states. [2020-10-28 08:51:27,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:27,812 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-10-28 08:51:27,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:51:27,813 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-28 08:51:27,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:27,813 INFO L225 Difference]: With dead ends: 74 [2020-10-28 08:51:27,814 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 08:51:27,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:51:27,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 08:51:27,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-28 08:51:27,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 08:51:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-28 08:51:27,826 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2020-10-28 08:51:27,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:27,827 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-28 08:51:27,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:51:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-28 08:51:27,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 08:51:27,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:27,831 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:27,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:51:27,832 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:27,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:27,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1645793164, now seen corresponding path program 9 times [2020-10-28 08:51:27,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:27,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141698996] [2020-10-28 08:51:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:27,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:27,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:30,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 08:51:30,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:30,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2345 [2020-10-28 08:51:30,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:30,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:30,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:51:30,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:51:30,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:51:30,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:30,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:30,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:30,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:30,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:30,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:30,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:30,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:30,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:30,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:30,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:30,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 08:51:30,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141698996] [2020-10-28 08:51:30,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:30,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:51:30,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015500667] [2020-10-28 08:51:30,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:51:30,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:30,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:51:30,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:51:30,344 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 11 states. [2020-10-28 08:51:30,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:30,483 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-10-28 08:51:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:51:30,484 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-28 08:51:30,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:30,484 INFO L225 Difference]: With dead ends: 60 [2020-10-28 08:51:30,484 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 08:51:30,485 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 [2020-10-28 08:51:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 08:51:30,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-28 08:51:30,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 08:51:30,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-28 08:51:30,491 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2020-10-28 08:51:30,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:30,492 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-28 08:51:30,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:51:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-28 08:51:30,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 08:51:30,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:30,493 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:30,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:51:30,494 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:30,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:30,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2062382378, now seen corresponding path program 10 times [2020-10-28 08:51:30,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:30,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952665611] [2020-10-28 08:51:30,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:30,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:30,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:33,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:33,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 08:51:33,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:33,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2697 [2020-10-28 08:51:33,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:33,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:33,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:51:33,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:33,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:51:33,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:33,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:33,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:33,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:33,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:33,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:33,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 08:51:33,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:33,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:33,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:33,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:33,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:33,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 08:51:33,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952665611] [2020-10-28 08:51:33,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:33,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:51:33,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138909619] [2020-10-28 08:51:33,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:51:33,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:33,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:51:33,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:33,328 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 8 states. [2020-10-28 08:51:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:33,441 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2020-10-28 08:51:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:51:33,442 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-28 08:51:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:33,442 INFO L225 Difference]: With dead ends: 80 [2020-10-28 08:51:33,443 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 08:51:33,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:51:33,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 08:51:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-28 08:51:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 08:51:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-28 08:51:33,454 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2020-10-28 08:51:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:33,455 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-28 08:51:33,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:51:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-28 08:51:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 08:51:33,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:33,456 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:33,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:51:33,456 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:33,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:33,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1728279672, now seen corresponding path program 11 times [2020-10-28 08:51:33,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:33,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546537505] [2020-10-28 08:51:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:33,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:33,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:36,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 08:51:36,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:36,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3319 [2020-10-28 08:51:36,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:36,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:36,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:51:36,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:51:36,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:51:36,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 08:51:36,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:36,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:36,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:36,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:36,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:36,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:36,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:36,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:36,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:36,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:51:36,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546537505] [2020-10-28 08:51:36,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:36,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:51:36,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847442561] [2020-10-28 08:51:36,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:51:36,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:36,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:51:36,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:51:36,965 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 12 states. [2020-10-28 08:51:37,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:37,069 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-28 08:51:37,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:51:37,070 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-28 08:51:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:37,071 INFO L225 Difference]: With dead ends: 64 [2020-10-28 08:51:37,071 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 08:51:37,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:51:37,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 08:51:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-28 08:51:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 08:51:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-28 08:51:37,086 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2020-10-28 08:51:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:37,086 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-28 08:51:37,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:51:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-28 08:51:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 08:51:37,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:37,090 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:37,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:51:37,091 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:37,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:37,091 INFO L82 PathProgramCache]: Analyzing trace with hash -2016271834, now seen corresponding path program 12 times [2020-10-28 08:51:37,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:37,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729232055] [2020-10-28 08:51:37,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:37,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:37,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:41,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 08:51:41,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:41,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3929 [2020-10-28 08:51:41,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:41,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:41,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:51:41,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:51:41,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:51:41,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:41,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:41,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:41,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:41,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:41,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:41,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:41,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:41,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:41,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:41,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:41,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:51:41,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729232055] [2020-10-28 08:51:41,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:41,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:51:41,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64537033] [2020-10-28 08:51:41,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:51:41,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:41,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:51:41,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:51:41,218 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 13 states. [2020-10-28 08:51:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:41,379 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-10-28 08:51:41,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:51:41,379 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-28 08:51:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:41,381 INFO L225 Difference]: With dead ends: 66 [2020-10-28 08:51:41,381 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 08:51:41,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:51:41,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 08:51:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-28 08:51:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 08:51:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-28 08:51:41,389 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-10-28 08:51:41,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:41,389 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-28 08:51:41,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:51:41,390 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-28 08:51:41,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 08:51:41,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:41,390 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:41,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:51:41,391 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:41,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:41,392 INFO L82 PathProgramCache]: Analyzing trace with hash 396134724, now seen corresponding path program 13 times [2020-10-28 08:51:41,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:41,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870612067] [2020-10-28 08:51:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:41,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:41,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:45,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 08:51:45,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:45,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3963 [2020-10-28 08:51:45,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:45,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:45,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:51:45,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:45,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:51:45,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:45,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:45,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:45,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:45,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:45,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:45,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:45,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:45,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:45,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:45,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:45,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 08:51:45,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870612067] [2020-10-28 08:51:45,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:45,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:51:45,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512643760] [2020-10-28 08:51:45,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:51:45,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:45,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:51:45,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:45,495 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 9 states. [2020-10-28 08:51:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:45,603 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-10-28 08:51:45,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:51:45,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-28 08:51:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:45,604 INFO L225 Difference]: With dead ends: 90 [2020-10-28 08:51:45,604 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 08:51:45,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:51:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 08:51:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-28 08:51:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 08:51:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-28 08:51:45,615 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2020-10-28 08:51:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:45,615 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-28 08:51:45,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:51:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-28 08:51:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 08:51:45,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:45,616 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:45,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:51:45,616 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:45,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1678565666, now seen corresponding path program 14 times [2020-10-28 08:51:45,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:45,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191304324] [2020-10-28 08:51:45,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:45,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:45,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:49,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:49,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:51:49,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:49,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4224 [2020-10-28 08:51:49,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:49,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:49,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:51:49,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:51:49,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:51:49,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:50,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:50,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:50,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:50,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:50,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:50,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:50,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:50,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:50,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:50,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:50,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:50,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:51:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 08:51:50,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191304324] [2020-10-28 08:51:50,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:50,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:51:50,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87742688] [2020-10-28 08:51:50,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:51:50,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:50,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:51:50,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:51:50,083 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 14 states. [2020-10-28 08:51:50,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:50,289 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-10-28 08:51:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:51:50,289 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-28 08:51:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:50,290 INFO L225 Difference]: With dead ends: 70 [2020-10-28 08:51:50,290 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 08:51:50,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:51:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 08:51:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-28 08:51:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 08:51:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-28 08:51:50,298 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2020-10-28 08:51:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:50,299 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-28 08:51:50,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:51:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-28 08:51:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 08:51:50,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:50,299 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:50,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:51:50,300 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash -802981568, now seen corresponding path program 15 times [2020-10-28 08:51:50,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:50,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893168747] [2020-10-28 08:51:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:50,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:50,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:54,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:54,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 08:51:54,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:54,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4054 [2020-10-28 08:51:54,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:54,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:54,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:51:54,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:51:54,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:51:54,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:54,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:54,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:54,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:54,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:54,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:54,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:51:54,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:54,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:54,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:54,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 08:51:54,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893168747] [2020-10-28 08:51:54,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:54,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:51:54,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437400088] [2020-10-28 08:51:54,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:51:54,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:54,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:51:54,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:54,519 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 10 states. [2020-10-28 08:51:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:54,666 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-10-28 08:51:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:51:54,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-28 08:51:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:54,668 INFO L225 Difference]: With dead ends: 96 [2020-10-28 08:51:54,668 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 08:51:54,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:51:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 08:51:54,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-28 08:51:54,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 08:51:54,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-28 08:51:54,680 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 51 [2020-10-28 08:51:54,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:54,680 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-28 08:51:54,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:51:54,681 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-28 08:51:54,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 08:51:54,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:54,682 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:54,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:51:54,682 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:54,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:54,683 INFO L82 PathProgramCache]: Analyzing trace with hash 986231326, now seen corresponding path program 16 times [2020-10-28 08:51:54,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:54,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497143986] [2020-10-28 08:51:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:51:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:54,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:54,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:59,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:59,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 08:51:59,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:51:59,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4864 [2020-10-28 08:51:59,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:59,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:51:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:51:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:51:59,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:59,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:51:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:51:59,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:51:59,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:51:59,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:51:59,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:51:59,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:51:59,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:51:59,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:51:59,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:51:59,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:51:59,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:51:59,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:51:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 08:51:59,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497143986] [2020-10-28 08:51:59,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:51:59,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:51:59,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540474476] [2020-10-28 08:51:59,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:51:59,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:51:59,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:51:59,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:51:59,788 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-10-28 08:51:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:51:59,960 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-28 08:51:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:51:59,960 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-28 08:51:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:51:59,961 INFO L225 Difference]: With dead ends: 74 [2020-10-28 08:51:59,961 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 08:51:59,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:51:59,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 08:51:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-28 08:51:59,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 08:51:59,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-28 08:51:59,969 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2020-10-28 08:51:59,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:51:59,969 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-28 08:51:59,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:51:59,970 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-28 08:51:59,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 08:51:59,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:51:59,970 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:51:59,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:51:59,975 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:51:59,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:51:59,976 INFO L82 PathProgramCache]: Analyzing trace with hash -416351428, now seen corresponding path program 17 times [2020-10-28 08:51:59,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:51:59,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007284279] [2020-10-28 08:51:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:00,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:00,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:04,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:04,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 08:52:04,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:04,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4857 [2020-10-28 08:52:04,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:04,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:04,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:52:04,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:52:04,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:52:04,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:05,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:05,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:05,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:05,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:05,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:05,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:52:05,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:05,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:05,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:05,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:05,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:05,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-28 08:52:05,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007284279] [2020-10-28 08:52:05,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:05,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:52:05,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514220523] [2020-10-28 08:52:05,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:52:05,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:05,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:52:05,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:52:05,076 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 16 states. [2020-10-28 08:52:05,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:05,212 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-10-28 08:52:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:52:05,212 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-10-28 08:52:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:05,213 INFO L225 Difference]: With dead ends: 76 [2020-10-28 08:52:05,213 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 08:52:05,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:52:05,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 08:52:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-28 08:52:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 08:52:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-28 08:52:05,219 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 55 [2020-10-28 08:52:05,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:05,219 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-28 08:52:05,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:52:05,219 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-28 08:52:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 08:52:05,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:05,220 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:05,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:52:05,220 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:05,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:05,221 INFO L82 PathProgramCache]: Analyzing trace with hash 321352922, now seen corresponding path program 18 times [2020-10-28 08:52:05,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:05,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249122848] [2020-10-28 08:52:05,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:05,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:05,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:10,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:10,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 08:52:10,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:10,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:52:10,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:10,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:52:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:52:10,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:10,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:10,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:10,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:10,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:10,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:10,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:10,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:10,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:10,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 08:52:10,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249122848] [2020-10-28 08:52:10,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:10,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:52:10,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089353236] [2020-10-28 08:52:10,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:52:10,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:10,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:52:10,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:10,370 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 11 states. [2020-10-28 08:52:10,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:10,460 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-10-28 08:52:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:52:10,461 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-28 08:52:10,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:10,462 INFO L225 Difference]: With dead ends: 106 [2020-10-28 08:52:10,462 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 08:52:10,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:52:10,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 08:52:10,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-28 08:52:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 08:52:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-28 08:52:10,467 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2020-10-28 08:52:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:10,467 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-28 08:52:10,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:52:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-28 08:52:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 08:52:10,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:10,468 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:10,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:52:10,468 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:10,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1789529912, now seen corresponding path program 19 times [2020-10-28 08:52:10,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:10,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970334544] [2020-10-28 08:52:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:10,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:15,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:15,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 08:52:15,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:15,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:52:15,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:15,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:15,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:52:15,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:52:15,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:52:15,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:15,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:15,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:15,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:15,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:15,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:15,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:15,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:15,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:15,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:15,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 08:52:15,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970334544] [2020-10-28 08:52:15,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:15,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:52:15,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021438364] [2020-10-28 08:52:15,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:52:15,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:15,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:52:15,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:52:15,753 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-10-28 08:52:15,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:15,929 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2020-10-28 08:52:15,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:52:15,930 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-28 08:52:15,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:15,931 INFO L225 Difference]: With dead ends: 80 [2020-10-28 08:52:15,931 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 08:52:15,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:52:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 08:52:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-28 08:52:15,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 08:52:15,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-28 08:52:15,940 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-10-28 08:52:15,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:15,940 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-28 08:52:15,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:52:15,940 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-28 08:52:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 08:52:15,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:15,941 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:15,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:52:15,941 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:15,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:15,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1540523562, now seen corresponding path program 20 times [2020-10-28 08:52:15,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:15,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916154507] [2020-10-28 08:52:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:15,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:15,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:20,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:20,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 08:52:20,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:20,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:52:20,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:20,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:52:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 08:52:20,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:52:20,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:21,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:21,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:21,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:21,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:21,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:21,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:21,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:21,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:21,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:21,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:21,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:21,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-28 08:52:21,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916154507] [2020-10-28 08:52:21,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:21,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:52:21,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838474381] [2020-10-28 08:52:21,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:52:21,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:21,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:52:21,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:52:21,208 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 18 states. [2020-10-28 08:52:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:21,396 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-28 08:52:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:52:21,396 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-28 08:52:21,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:21,397 INFO L225 Difference]: With dead ends: 82 [2020-10-28 08:52:21,397 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 08:52:21,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:52:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 08:52:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-28 08:52:21,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 08:52:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-28 08:52:21,402 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-10-28 08:52:21,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:21,402 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-28 08:52:21,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:52:21,402 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-28 08:52:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:52:21,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:21,403 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:21,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:52:21,403 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:21,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1971276556, now seen corresponding path program 21 times [2020-10-28 08:52:21,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:21,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415048819] [2020-10-28 08:52:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:21,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:21,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:26,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:52:26,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:26,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:52:26,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:26,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:26,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:52:26,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:26,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:52:26,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:26,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:26,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:26,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:26,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:26,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:52:26,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:26,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:26,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:26,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:26,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:26,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 08:52:26,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415048819] [2020-10-28 08:52:26,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:26,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:52:26,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583608783] [2020-10-28 08:52:26,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:52:26,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:52:26,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:52:26,587 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 12 states. [2020-10-28 08:52:26,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:26,707 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2020-10-28 08:52:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:52:26,707 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-28 08:52:26,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:26,708 INFO L225 Difference]: With dead ends: 116 [2020-10-28 08:52:26,708 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 08:52:26,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:52:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 08:52:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-28 08:52:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 08:52:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-28 08:52:26,714 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2020-10-28 08:52:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:26,715 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-28 08:52:26,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:52:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-28 08:52:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 08:52:26,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:26,716 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:26,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:52:26,716 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:26,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:26,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1531866926, now seen corresponding path program 22 times [2020-10-28 08:52:26,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:26,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339986597] [2020-10-28 08:52:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:26,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:26,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:31,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:31,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 08:52:31,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:31,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 08:52:31,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:31,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:31,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:52:31,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 08:52:31,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:52:31,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:32,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:32,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:32,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:32,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:32,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:32,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:32,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:32,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:32,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:32,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:32,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:32,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-28 08:52:32,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339986597] [2020-10-28 08:52:32,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:32,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:52:32,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940831494] [2020-10-28 08:52:32,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:52:32,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:32,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:52:32,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:52:32,048 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-10-28 08:52:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:32,261 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2020-10-28 08:52:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:52:32,262 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2020-10-28 08:52:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:32,263 INFO L225 Difference]: With dead ends: 86 [2020-10-28 08:52:32,263 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 08:52:32,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:52:32,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 08:52:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-28 08:52:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 08:52:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-28 08:52:32,268 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2020-10-28 08:52:32,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:32,268 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-28 08:52:32,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:52:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-28 08:52:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 08:52:32,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:32,269 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:32,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:52:32,270 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:32,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2052783344, now seen corresponding path program 23 times [2020-10-28 08:52:32,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:32,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448489388] [2020-10-28 08:52:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:32,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:32,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:37,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:37,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 08:52:37,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:37,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-28 08:52:37,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:37,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:52:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:37,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:52:37,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:37,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:37,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:37,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:37,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:37,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:37,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:52:37,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:37,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:37,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:37,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:37,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:37,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-28 08:52:37,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448489388] [2020-10-28 08:52:37,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:37,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:52:37,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64882534] [2020-10-28 08:52:37,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:52:37,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:37,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:52:37,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:37,492 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 13 states. [2020-10-28 08:52:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:37,611 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-10-28 08:52:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:52:37,611 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-28 08:52:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:37,612 INFO L225 Difference]: With dead ends: 122 [2020-10-28 08:52:37,612 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 08:52:37,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:52:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 08:52:37,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-28 08:52:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 08:52:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-28 08:52:37,617 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2020-10-28 08:52:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:37,617 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-28 08:52:37,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:52:37,617 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-28 08:52:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 08:52:37,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:37,618 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:37,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:52:37,618 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:37,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:37,619 INFO L82 PathProgramCache]: Analyzing trace with hash 383695310, now seen corresponding path program 24 times [2020-10-28 08:52:37,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:37,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865655427] [2020-10-28 08:52:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:37,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:37,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:42,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:42,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 08:52:42,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:42,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:52:42,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:42,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:42,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:52:42,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:52:42,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:52:42,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:42,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:42,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:42,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:42,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:42,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:42,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:42,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:42,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:42,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:42,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:42,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:42,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 08:52:42,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865655427] [2020-10-28 08:52:42,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:42,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:52:42,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922828620] [2020-10-28 08:52:42,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:52:42,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:42,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:52:42,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:52:42,955 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 20 states. [2020-10-28 08:52:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:43,181 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-10-28 08:52:43,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:52:43,181 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 69 [2020-10-28 08:52:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:43,182 INFO L225 Difference]: With dead ends: 90 [2020-10-28 08:52:43,182 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 08:52:43,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:52:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 08:52:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-28 08:52:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 08:52:43,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-28 08:52:43,192 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 69 [2020-10-28 08:52:43,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:43,193 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-28 08:52:43,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:52:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-28 08:52:43,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 08:52:43,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:43,194 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:43,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:52:43,197 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:43,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:43,198 INFO L82 PathProgramCache]: Analyzing trace with hash 367122156, now seen corresponding path program 25 times [2020-10-28 08:52:43,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:43,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294259311] [2020-10-28 08:52:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:43,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:43,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:48,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:48,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 08:52:48,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:48,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 08:52:48,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:48,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:52:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:52:48,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:52:48,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:48,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:48,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:48,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:48,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:48,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:48,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:48,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:48,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:48,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:48,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:48,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 08:52:48,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294259311] [2020-10-28 08:52:48,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:48,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:52:48,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700883992] [2020-10-28 08:52:48,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:52:48,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:48,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:52:48,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:52:48,587 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 21 states. [2020-10-28 08:52:48,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:48,822 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2020-10-28 08:52:48,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:52:48,823 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 71 [2020-10-28 08:52:48,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:48,824 INFO L225 Difference]: With dead ends: 92 [2020-10-28 08:52:48,824 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 08:52:48,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:52:48,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 08:52:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-28 08:52:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 08:52:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-28 08:52:48,833 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 71 [2020-10-28 08:52:48,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:48,834 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-28 08:52:48,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:52:48,834 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-28 08:52:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 08:52:48,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:48,837 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:48,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:52:48,837 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:48,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:48,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1620190346, now seen corresponding path program 26 times [2020-10-28 08:52:48,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:48,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806201380] [2020-10-28 08:52:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:48,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:48,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:53,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:53,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 08:52:53,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:53,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 08:52:53,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:53,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:53,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:52:53,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:52:53,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:52:53,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:54,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:54,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:54,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:54,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:54,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:54,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:52:54,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:54,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:54,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:54,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:54,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-28 08:52:54,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806201380] [2020-10-28 08:52:54,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:54,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:52:54,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209898348] [2020-10-28 08:52:54,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:52:54,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:54,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:52:54,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:52:54,050 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 14 states. [2020-10-28 08:52:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:54,219 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2020-10-28 08:52:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:52:54,219 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-28 08:52:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:54,221 INFO L225 Difference]: With dead ends: 132 [2020-10-28 08:52:54,221 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 08:52:54,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:52:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 08:52:54,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-28 08:52:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 08:52:54,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-28 08:52:54,227 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-10-28 08:52:54,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:54,227 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-28 08:52:54,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:52:54,227 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-28 08:52:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 08:52:54,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:54,228 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:54,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:52:54,229 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:54,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1107313384, now seen corresponding path program 27 times [2020-10-28 08:52:54,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:54,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173804424] [2020-10-28 08:52:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:54,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:54,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:59,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:59,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 08:52:59,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:52:59,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-28 08:52:59,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:59,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:59,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:52:59,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 08:52:59,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:52:59,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:59,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:52:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:59,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:59,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:52:59,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:52:59,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:52:59,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:52:59,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:52:59,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:52:59,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:52:59,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:52:59,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:52:59,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:52:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-28 08:52:59,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173804424] [2020-10-28 08:52:59,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:52:59,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:52:59,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38605155] [2020-10-28 08:52:59,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:52:59,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:52:59,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:52:59,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:52:59,646 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 22 states. [2020-10-28 08:52:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:52:59,790 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-10-28 08:52:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:52:59,790 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 75 [2020-10-28 08:52:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:52:59,792 INFO L225 Difference]: With dead ends: 96 [2020-10-28 08:52:59,792 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 08:52:59,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:52:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 08:52:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-28 08:52:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 08:52:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-28 08:52:59,799 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 75 [2020-10-28 08:52:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:52:59,799 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-28 08:52:59,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:52:59,800 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-28 08:52:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 08:52:59,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:52:59,801 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:52:59,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:52:59,802 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:52:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:52:59,802 INFO L82 PathProgramCache]: Analyzing trace with hash -20610682, now seen corresponding path program 28 times [2020-10-28 08:52:59,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:52:59,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953549688] [2020-10-28 08:52:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:52:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:52:59,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:52:59,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:04,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:04,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 08:53:04,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:04,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 08:53:04,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:04,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:04,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:53:04,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:04,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:53:04,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:05,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:05,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:05,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:05,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:05,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:05,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:05,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:05,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:05,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-28 08:53:05,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953549688] [2020-10-28 08:53:05,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:05,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:53:05,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85664976] [2020-10-28 08:53:05,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:53:05,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:05,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:53:05,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:53:05,038 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 15 states. [2020-10-28 08:53:05,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:05,210 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2020-10-28 08:53:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:53:05,210 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 77 [2020-10-28 08:53:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:05,212 INFO L225 Difference]: With dead ends: 138 [2020-10-28 08:53:05,212 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 08:53:05,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:53:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 08:53:05,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-28 08:53:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 08:53:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-28 08:53:05,217 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 77 [2020-10-28 08:53:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:05,217 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-28 08:53:05,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:53:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-28 08:53:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 08:53:05,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:05,219 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:05,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:53:05,219 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:05,219 INFO L82 PathProgramCache]: Analyzing trace with hash 622936292, now seen corresponding path program 29 times [2020-10-28 08:53:05,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:05,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388477393] [2020-10-28 08:53:05,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:05,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:10,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:10,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 08:53:10,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:10,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 08:53:10,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:10,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:10,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:53:10,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:53:10,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:53:10,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:10,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:10,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:10,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:10,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:10,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:10,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:10,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:10,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:10,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:10,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:10,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:10,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 08:53:10,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388477393] [2020-10-28 08:53:10,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:10,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:53:10,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978263872] [2020-10-28 08:53:10,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:53:10,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:10,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:53:10,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:53:10,663 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 23 states. [2020-10-28 08:53:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:10,813 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2020-10-28 08:53:10,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:53:10,814 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 79 [2020-10-28 08:53:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:10,815 INFO L225 Difference]: With dead ends: 100 [2020-10-28 08:53:10,815 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 08:53:10,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:53:10,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 08:53:10,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-28 08:53:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 08:53:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-28 08:53:10,821 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 79 [2020-10-28 08:53:10,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:10,821 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-28 08:53:10,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:53:10,822 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-28 08:53:10,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 08:53:10,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:10,822 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:10,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:53:10,823 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:10,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:10,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1650528126, now seen corresponding path program 30 times [2020-10-28 08:53:10,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:10,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029577517] [2020-10-28 08:53:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:10,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:10,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:15,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:15,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 08:53:15,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:15,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 08:53:15,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:15,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:15,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:53:15,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:53:15,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:53:15,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:16,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:16,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:16,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:16,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:16,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:16,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:16,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:16,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:16,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:16,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 08:53:16,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029577517] [2020-10-28 08:53:16,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:16,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:53:16,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416340406] [2020-10-28 08:53:16,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:53:16,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:16,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:53:16,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:53:16,277 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 24 states. [2020-10-28 08:53:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:16,523 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2020-10-28 08:53:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:53:16,524 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 81 [2020-10-28 08:53:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:16,525 INFO L225 Difference]: With dead ends: 102 [2020-10-28 08:53:16,525 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 08:53:16,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:53:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 08:53:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-28 08:53:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 08:53:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-28 08:53:16,532 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 81 [2020-10-28 08:53:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:16,532 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-28 08:53:16,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:53:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-28 08:53:16,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 08:53:16,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:16,533 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:16,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:53:16,535 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:16,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:16,538 INFO L82 PathProgramCache]: Analyzing trace with hash -311480160, now seen corresponding path program 31 times [2020-10-28 08:53:16,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:16,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372506256] [2020-10-28 08:53:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:16,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:16,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:21,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:21,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 08:53:21,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:21,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:53:21,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:21,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:21,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:53:21,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:21,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:53:21,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:21,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:21,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:21,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:21,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:21,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:21,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:21,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:21,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:21,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:21,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:21,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:21,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-28 08:53:21,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372506256] [2020-10-28 08:53:21,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:21,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:53:21,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890490367] [2020-10-28 08:53:21,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:53:21,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:21,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:53:21,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:53:21,762 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 16 states. [2020-10-28 08:53:21,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:21,932 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2020-10-28 08:53:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:53:21,932 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 83 [2020-10-28 08:53:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:21,933 INFO L225 Difference]: With dead ends: 148 [2020-10-28 08:53:21,934 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 08:53:21,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:53:21,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 08:53:21,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-28 08:53:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 08:53:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-28 08:53:21,940 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2020-10-28 08:53:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:21,940 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-28 08:53:21,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:53:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-28 08:53:21,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 08:53:21,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:21,941 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:21,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:53:21,942 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash -699829890, now seen corresponding path program 32 times [2020-10-28 08:53:21,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:21,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435296187] [2020-10-28 08:53:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:21,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:21,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:26,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:26,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 08:53:26,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:26,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 08:53:26,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:26,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:26,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:53:26,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:53:26,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:53:26,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:27,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:27,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:27,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:27,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:27,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:27,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:27,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:27,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:27,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:27,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:27,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:27,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 08:53:27,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435296187] [2020-10-28 08:53:27,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:27,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:53:27,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840253275] [2020-10-28 08:53:27,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:53:27,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:27,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:53:27,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:53:27,444 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 25 states. [2020-10-28 08:53:27,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:27,714 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2020-10-28 08:53:27,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:53:27,714 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 85 [2020-10-28 08:53:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:27,716 INFO L225 Difference]: With dead ends: 106 [2020-10-28 08:53:27,716 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 08:53:27,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:53:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 08:53:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-28 08:53:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 08:53:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-28 08:53:27,722 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2020-10-28 08:53:27,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:27,722 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-28 08:53:27,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:53:27,722 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-28 08:53:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 08:53:27,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:27,723 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:27,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:53:27,724 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:27,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:27,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1518509412, now seen corresponding path program 33 times [2020-10-28 08:53:27,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:27,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079510173] [2020-10-28 08:53:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:27,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:27,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:32,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:32,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 08:53:32,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:32,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:53:32,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:32,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:32,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:53:32,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:53:32,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 08:53:32,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:33,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:33,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:33,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:33,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:33,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:33,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:33,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:33,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:33,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-28 08:53:33,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079510173] [2020-10-28 08:53:33,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:33,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:53:33,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225991992] [2020-10-28 08:53:33,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:53:33,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:33,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:53:33,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:53:33,251 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 26 states. [2020-10-28 08:53:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:33,410 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-10-28 08:53:33,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 08:53:33,411 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 87 [2020-10-28 08:53:33,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:33,412 INFO L225 Difference]: With dead ends: 108 [2020-10-28 08:53:33,414 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 08:53:33,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:53:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 08:53:33,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-28 08:53:33,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 08:53:33,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-28 08:53:33,423 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2020-10-28 08:53:33,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:33,423 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-28 08:53:33,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 08:53:33,423 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-28 08:53:33,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 08:53:33,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:33,424 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:33,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 08:53:33,425 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:33,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2004452410, now seen corresponding path program 34 times [2020-10-28 08:53:33,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:33,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359773411] [2020-10-28 08:53:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:33,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:33,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:38,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:38,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 08:53:38,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:38,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-28 08:53:38,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:38,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:38,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:53:38,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:38,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:53:38,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:38,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:38,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:38,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:38,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:38,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:38,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:53:38,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:38,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:38,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:38,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:38,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:38,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-28 08:53:38,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359773411] [2020-10-28 08:53:38,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:38,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:53:38,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814672846] [2020-10-28 08:53:38,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:53:38,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:38,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:53:38,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:53:38,728 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 17 states. [2020-10-28 08:53:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:38,857 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-10-28 08:53:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:53:38,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 89 [2020-10-28 08:53:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:38,859 INFO L225 Difference]: With dead ends: 158 [2020-10-28 08:53:38,859 INFO L226 Difference]: Without dead ends: 97 [2020-10-28 08:53:38,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:53:38,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-28 08:53:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-28 08:53:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 08:53:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-28 08:53:38,865 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 89 [2020-10-28 08:53:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:38,866 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-28 08:53:38,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:53:38,866 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-28 08:53:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 08:53:38,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:38,867 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:38,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 08:53:38,867 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:38,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:38,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1128998552, now seen corresponding path program 35 times [2020-10-28 08:53:38,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:38,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230643926] [2020-10-28 08:53:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:38,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:38,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:43,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:43,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:53:43,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:43,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 08:53:43,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:43,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 08:53:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 08:53:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 08:53:43,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:44,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:44,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:44,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:44,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:44,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:44,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:53:44,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:44,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:44,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:44,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:44,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:44,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-28 08:53:44,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230643926] [2020-10-28 08:53:44,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:44,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 08:53:44,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518209939] [2020-10-28 08:53:44,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 08:53:44,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:44,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 08:53:44,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 08:53:44,477 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 27 states. [2020-10-28 08:53:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:44,780 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2020-10-28 08:53:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 08:53:44,780 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 91 [2020-10-28 08:53:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:44,782 INFO L225 Difference]: With dead ends: 112 [2020-10-28 08:53:44,782 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 08:53:44,783 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 [2020-10-28 08:53:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 08:53:44,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-28 08:53:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 08:53:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-28 08:53:44,790 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2020-10-28 08:53:44,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:44,791 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-28 08:53:44,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 08:53:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-28 08:53:44,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 08:53:44,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:44,793 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:44,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 08:53:44,794 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:44,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:44,794 INFO L82 PathProgramCache]: Analyzing trace with hash -656000714, now seen corresponding path program 36 times [2020-10-28 08:53:44,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:44,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327074065] [2020-10-28 08:53:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:44,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:44,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:49,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:49,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 08:53:49,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:49,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 08:53:49,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:49,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:53:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:53:49,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:53:49,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:50,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:50,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:50,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:50,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:50,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:50,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:50,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:50,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:50,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:50,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:50,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:50,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-28 08:53:50,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327074065] [2020-10-28 08:53:50,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:50,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:53:50,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124234557] [2020-10-28 08:53:50,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:53:50,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:50,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:53:50,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:53:50,093 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 18 states. [2020-10-28 08:53:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:50,274 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2020-10-28 08:53:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:53:50,274 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 93 [2020-10-28 08:53:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:50,275 INFO L225 Difference]: With dead ends: 164 [2020-10-28 08:53:50,275 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 08:53:50,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:53:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 08:53:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-28 08:53:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 08:53:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-10-28 08:53:50,282 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2020-10-28 08:53:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:50,282 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-10-28 08:53:50,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:53:50,282 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-10-28 08:53:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 08:53:50,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:50,285 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:50,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 08:53:50,285 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:50,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1145273492, now seen corresponding path program 37 times [2020-10-28 08:53:50,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:50,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116714909] [2020-10-28 08:53:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:50,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:50,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:55,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:55,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 08:53:55,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:53:55,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-28 08:53:55,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:55,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:55,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 08:53:55,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:53:55,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 08:53:55,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:55,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:53:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:55,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:55,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:53:55,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:53:55,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:53:55,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:53:55,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:53:55,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:53:55,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:53:55,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:53:55,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:53:55,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:53:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 08:53:55,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116714909] [2020-10-28 08:53:55,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:53:55,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 08:53:55,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724887806] [2020-10-28 08:53:55,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 08:53:55,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:53:55,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 08:53:55,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:53:55,957 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 28 states. [2020-10-28 08:53:56,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:53:56,262 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2020-10-28 08:53:56,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 08:53:56,263 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 95 [2020-10-28 08:53:56,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:53:56,264 INFO L225 Difference]: With dead ends: 116 [2020-10-28 08:53:56,264 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 08:53:56,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 08:53:56,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 08:53:56,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-28 08:53:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 08:53:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-28 08:53:56,271 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 95 [2020-10-28 08:53:56,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:53:56,271 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-28 08:53:56,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 08:53:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-28 08:53:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 08:53:56,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:53:56,272 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:53:56,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 08:53:56,273 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:53:56,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:53:56,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2099314738, now seen corresponding path program 38 times [2020-10-28 08:53:56,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:53:56,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326946669] [2020-10-28 08:53:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:53:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:53:56,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:53:56,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:01,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:01,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 08:54:01,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:01,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:54:01,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:01,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:01,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 08:54:01,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 08:54:01,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 08:54:01,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:01,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:01,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:01,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:01,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:01,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:01,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:54:01,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:01,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:01,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:01,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:01,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:01,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 08:54:01,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326946669] [2020-10-28 08:54:01,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:01,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 08:54:01,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165953932] [2020-10-28 08:54:01,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 08:54:01,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:01,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 08:54:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:54:01,914 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 29 states. [2020-10-28 08:54:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:02,241 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2020-10-28 08:54:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 08:54:02,241 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 97 [2020-10-28 08:54:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:02,242 INFO L225 Difference]: With dead ends: 118 [2020-10-28 08:54:02,242 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 08:54:02,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 08:54:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 08:54:02,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-28 08:54:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 08:54:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-28 08:54:02,248 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 97 [2020-10-28 08:54:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:02,249 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-28 08:54:02,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 08:54:02,249 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-28 08:54:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 08:54:02,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:02,250 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:02,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 08:54:02,250 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash -190049200, now seen corresponding path program 39 times [2020-10-28 08:54:02,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:02,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678387790] [2020-10-28 08:54:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:02,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:02,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:07,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:07,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 08:54:07,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:07,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5119 [2020-10-28 08:54:07,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:07,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:07,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:54:07,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:07,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:54:07,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:07,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:07,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:07,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:07,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:07,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:07,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:07,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:07,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:07,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:07,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-28 08:54:07,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678387790] [2020-10-28 08:54:07,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:07,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:54:07,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560874896] [2020-10-28 08:54:07,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:54:07,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:07,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:54:07,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:54:07,674 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 19 states. [2020-10-28 08:54:07,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:07,882 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2020-10-28 08:54:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:54:07,882 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 99 [2020-10-28 08:54:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:07,883 INFO L225 Difference]: With dead ends: 174 [2020-10-28 08:54:07,883 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 08:54:07,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:54:07,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 08:54:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-28 08:54:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 08:54:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-28 08:54:07,890 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 99 [2020-10-28 08:54:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:07,890 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-28 08:54:07,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:54:07,891 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-28 08:54:07,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 08:54:07,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:07,892 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:07,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 08:54:07,892 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:07,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:07,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1414846766, now seen corresponding path program 40 times [2020-10-28 08:54:07,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:07,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927262020] [2020-10-28 08:54:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:07,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:07,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:12,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:12,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 08:54:12,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:12,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 08:54:12,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:12,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 08:54:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 08:54:12,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 08:54:12,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:13,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:13,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:13,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:13,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:13,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:13,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:54:13,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:13,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:13,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:13,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:13,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:13,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-28 08:54:13,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927262020] [2020-10-28 08:54:13,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:13,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 08:54:13,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945109746] [2020-10-28 08:54:13,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 08:54:13,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:13,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 08:54:13,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:54:13,597 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 30 states. [2020-10-28 08:54:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:13,933 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2020-10-28 08:54:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 08:54:13,934 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 101 [2020-10-28 08:54:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:13,936 INFO L225 Difference]: With dead ends: 122 [2020-10-28 08:54:13,936 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 08:54:13,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 08:54:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 08:54:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-28 08:54:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 08:54:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-10-28 08:54:13,942 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 101 [2020-10-28 08:54:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:13,943 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-10-28 08:54:13,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 08:54:13,943 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-10-28 08:54:13,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 08:54:13,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:13,944 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:13,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 08:54:13,944 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:13,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:13,944 INFO L82 PathProgramCache]: Analyzing trace with hash -833774004, now seen corresponding path program 41 times [2020-10-28 08:54:13,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:13,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65616152] [2020-10-28 08:54:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:13,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:14,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:18,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:18,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 08:54:18,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:18,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:54:18,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:18,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:18,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:54:18,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:18,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:54:18,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:19,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:19,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:19,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:19,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:19,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:19,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:19,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:19,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:19,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:19,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:19,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-28 08:54:19,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65616152] [2020-10-28 08:54:19,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:19,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:54:19,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906407105] [2020-10-28 08:54:19,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:54:19,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:19,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:54:19,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:54:19,308 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 20 states. [2020-10-28 08:54:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:19,507 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2020-10-28 08:54:19,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:54:19,507 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-10-28 08:54:19,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:19,509 INFO L225 Difference]: With dead ends: 180 [2020-10-28 08:54:19,509 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 08:54:19,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:54:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 08:54:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-28 08:54:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 08:54:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-28 08:54:19,516 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2020-10-28 08:54:19,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:19,516 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-28 08:54:19,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:54:19,517 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-28 08:54:19,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 08:54:19,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:19,518 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:19,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 08:54:19,518 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:19,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:19,519 INFO L82 PathProgramCache]: Analyzing trace with hash -265501654, now seen corresponding path program 42 times [2020-10-28 08:54:19,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:19,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310322110] [2020-10-28 08:54:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:19,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:19,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:24,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:24,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 08:54:24,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:24,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 08:54:24,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:24,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:24,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 08:54:24,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 08:54:24,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 08:54:24,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:25,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:25,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:25,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:25,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:25,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:25,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:25,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:25,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:25,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:25,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1018 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 08:54:25,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310322110] [2020-10-28 08:54:25,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:25,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 08:54:25,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27561343] [2020-10-28 08:54:25,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 08:54:25,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:25,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 08:54:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:54:25,346 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 31 states. [2020-10-28 08:54:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:25,680 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2020-10-28 08:54:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 08:54:25,681 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 105 [2020-10-28 08:54:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:25,682 INFO L225 Difference]: With dead ends: 126 [2020-10-28 08:54:25,682 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 08:54:25,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 08:54:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 08:54:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-28 08:54:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 08:54:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-10-28 08:54:25,688 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 105 [2020-10-28 08:54:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:25,689 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-10-28 08:54:25,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 08:54:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-10-28 08:54:25,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 08:54:25,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:25,690 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:25,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 08:54:25,690 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:25,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:25,690 INFO L82 PathProgramCache]: Analyzing trace with hash -740902328, now seen corresponding path program 43 times [2020-10-28 08:54:25,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:25,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757546526] [2020-10-28 08:54:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:25,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:25,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:30,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:30,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 08:54:30,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:30,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 08:54:30,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:30,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:30,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 08:54:30,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 08:54:30,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 08:54:30,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:31,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:31,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:31,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:31,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:31,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:31,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:31,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:31,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:31,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:31,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:31,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:31,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-28 08:54:31,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757546526] [2020-10-28 08:54:31,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:31,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 08:54:31,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59077680] [2020-10-28 08:54:31,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 08:54:31,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:31,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 08:54:31,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:54:31,497 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 32 states. [2020-10-28 08:54:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:31,695 INFO L93 Difference]: Finished difference Result 128 states and 131 transitions. [2020-10-28 08:54:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 08:54:31,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 107 [2020-10-28 08:54:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:31,697 INFO L225 Difference]: With dead ends: 128 [2020-10-28 08:54:31,697 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 08:54:31,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 08:54:31,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 08:54:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-28 08:54:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 08:54:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-28 08:54:31,703 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 107 [2020-10-28 08:54:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:31,703 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-28 08:54:31,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 08:54:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-28 08:54:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 08:54:31,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:31,704 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:31,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 08:54:31,704 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1960550630, now seen corresponding path program 44 times [2020-10-28 08:54:31,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:31,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717745512] [2020-10-28 08:54:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:31,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:31,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:36,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:36,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 08:54:36,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:36,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-28 08:54:36,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:36,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:54:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:54:36,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:37,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:37,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:37,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:37,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:37,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:37,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:37,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:37,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:37,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:37,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:37,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:37,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1130 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-28 08:54:37,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717745512] [2020-10-28 08:54:37,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:37,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:54:37,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874568387] [2020-10-28 08:54:37,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:54:37,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:37,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:54:37,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:54:37,127 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 21 states. [2020-10-28 08:54:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:37,274 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2020-10-28 08:54:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:54:37,274 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2020-10-28 08:54:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:37,278 INFO L225 Difference]: With dead ends: 190 [2020-10-28 08:54:37,278 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 08:54:37,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:54:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 08:54:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-10-28 08:54:37,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-28 08:54:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-10-28 08:54:37,285 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 109 [2020-10-28 08:54:37,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:37,285 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-10-28 08:54:37,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:54:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-10-28 08:54:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 08:54:37,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:37,286 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:37,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 08:54:37,286 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:37,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:37,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1716361148, now seen corresponding path program 45 times [2020-10-28 08:54:37,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:37,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892386635] [2020-10-28 08:54:37,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:37,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:37,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:42,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:42,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 08:54:42,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:42,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-28 08:54:42,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:42,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:42,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 08:54:42,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 08:54:42,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 08:54:42,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:43,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:43,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:43,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:43,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:43,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:43,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:54:43,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:43,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:43,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:43,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:43,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:43,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-28 08:54:43,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892386635] [2020-10-28 08:54:43,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:43,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 08:54:43,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496689097] [2020-10-28 08:54:43,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 08:54:43,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:43,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 08:54:43,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:54:43,107 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 33 states. [2020-10-28 08:54:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:43,447 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2020-10-28 08:54:43,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 08:54:43,448 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 111 [2020-10-28 08:54:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:43,451 INFO L225 Difference]: With dead ends: 132 [2020-10-28 08:54:43,452 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 08:54:43,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 08:54:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 08:54:43,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-28 08:54:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 08:54:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-28 08:54:43,459 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 111 [2020-10-28 08:54:43,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:43,460 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-28 08:54:43,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 08:54:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-28 08:54:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 08:54:43,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:43,461 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:43,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-28 08:54:43,461 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash 847495138, now seen corresponding path program 46 times [2020-10-28 08:54:43,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:43,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199052272] [2020-10-28 08:54:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:43,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:43,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:48,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:48,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 08:54:48,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:48,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:54:48,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:48,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 08:54:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 08:54:48,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 08:54:48,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:49,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:49,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:49,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:49,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:49,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:49,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:49,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:49,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:49,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:49,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:49,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:49,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-28 08:54:49,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199052272] [2020-10-28 08:54:49,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:49,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 08:54:49,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519889758] [2020-10-28 08:54:49,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 08:54:49,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:49,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 08:54:49,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:54:49,347 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 34 states. [2020-10-28 08:54:49,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:49,566 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2020-10-28 08:54:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 08:54:49,567 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 113 [2020-10-28 08:54:49,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:49,568 INFO L225 Difference]: With dead ends: 134 [2020-10-28 08:54:49,568 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 08:54:49,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 08:54:49,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 08:54:49,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-28 08:54:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 08:54:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-10-28 08:54:49,574 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2020-10-28 08:54:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:49,574 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-10-28 08:54:49,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 08:54:49,575 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-10-28 08:54:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 08:54:49,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:49,576 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:49,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-28 08:54:49,576 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:49,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:49,576 INFO L82 PathProgramCache]: Analyzing trace with hash -597841920, now seen corresponding path program 47 times [2020-10-28 08:54:49,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:49,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503034616] [2020-10-28 08:54:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:49,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:49,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:54,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:54,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 08:54:54,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:54:54,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 08:54:54,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:54,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:54,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:54:54,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:54:54,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:54:54,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:54,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:54:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:54,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:54,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:54:54,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:54:54,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:54:54,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:54:54,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:54:54,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:54:54,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:54:54,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:54:54,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:54:54,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:54:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-28 08:54:54,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503034616] [2020-10-28 08:54:54,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:54:54,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:54:54,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130284231] [2020-10-28 08:54:54,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:54:54,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:54:54,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:54:54,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:54:54,987 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 22 states. [2020-10-28 08:54:55,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:54:55,234 INFO L93 Difference]: Finished difference Result 200 states and 204 transitions. [2020-10-28 08:54:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:54:55,235 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2020-10-28 08:54:55,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:54:55,237 INFO L225 Difference]: With dead ends: 200 [2020-10-28 08:54:55,237 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 08:54:55,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:54:55,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 08:54:55,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-28 08:54:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 08:54:55,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-28 08:54:55,241 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 115 [2020-10-28 08:54:55,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:54:55,242 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-28 08:54:55,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:54:55,242 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-28 08:54:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 08:54:55,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:55,243 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:54:55,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-28 08:54:55,243 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:55,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:55,244 INFO L82 PathProgramCache]: Analyzing trace with hash -313724706, now seen corresponding path program 48 times [2020-10-28 08:54:55,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:55,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145347565] [2020-10-28 08:54:55,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:55,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:55,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:00,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:00,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 08:55:00,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:55:00,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-28 08:55:00,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:00,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:00,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 08:55:00,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 08:55:00,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 08:55:00,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:01,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:01,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:01,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:01,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:01,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:01,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:55:01,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:01,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:01,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:01,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:01,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:01,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1322 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-28 08:55:01,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145347565] [2020-10-28 08:55:01,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:01,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 08:55:01,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047921265] [2020-10-28 08:55:01,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 08:55:01,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:01,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 08:55:01,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 08:55:01,242 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 35 states. [2020-10-28 08:55:01,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:01,642 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2020-10-28 08:55:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 08:55:01,643 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 117 [2020-10-28 08:55:01,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:01,644 INFO L225 Difference]: With dead ends: 138 [2020-10-28 08:55:01,644 INFO L226 Difference]: Without dead ends: 125 [2020-10-28 08:55:01,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 08:55:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-28 08:55:01,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-28 08:55:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 08:55:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-10-28 08:55:01,650 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 117 [2020-10-28 08:55:01,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:01,650 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-10-28 08:55:01,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 08:55:01,650 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-10-28 08:55:01,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 08:55:01,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:01,651 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:01,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-28 08:55:01,652 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:01,652 INFO L82 PathProgramCache]: Analyzing trace with hash 161384956, now seen corresponding path program 49 times [2020-10-28 08:55:01,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:01,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467961718] [2020-10-28 08:55:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:01,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:01,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:06,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:06,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 08:55:06,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 08:55:06,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-28 08:55:06,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:06,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:06,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:55:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:55:06,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:07,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:07,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:07,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:07,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:07,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:07,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:07,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:07,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:07,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:07,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:07,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:07,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1385 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-28 08:55:07,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467961718] [2020-10-28 08:55:07,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:07,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:55:07,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58086961] [2020-10-28 08:55:07,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:55:07,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:07,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:55:07,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:55:07,135 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 23 states. [2020-10-28 08:55:07,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:07,324 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2020-10-28 08:55:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:55:07,325 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 119 [2020-10-28 08:55:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:07,326 INFO L225 Difference]: With dead ends: 206 [2020-10-28 08:55:07,327 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 08:55:07,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:55:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 08:55:07,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-28 08:55:07,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 08:55:07,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-28 08:55:07,333 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 119 [2020-10-28 08:55:07,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:07,334 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-28 08:55:07,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:55:07,334 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-28 08:55:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 08:55:07,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:07,335 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:07,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-28 08:55:07,335 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:07,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:07,336 INFO L82 PathProgramCache]: Analyzing trace with hash 232928218, now seen corresponding path program 50 times [2020-10-28 08:55:07,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:07,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322843259] [2020-10-28 08:55:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:07,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:07,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking...