/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-lopstr16/scalar_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:26:16,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:26:16,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:26:16,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:26:16,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:26:16,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:26:16,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:26:16,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:26:16,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:26:16,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:26:16,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:26:16,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:26:16,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:26:16,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:26:16,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:26:16,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:26:16,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:26:16,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:26:16,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:26:16,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:26:16,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:26:16,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:26:16,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:26:16,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:26:16,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:26:16,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:26:16,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:26:16,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:26:16,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:26:16,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:26:16,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:26:16,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:26:16,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:26:16,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:26:16,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:26:16,313 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:26:16,314 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:26:16,314 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:26:16,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:26:16,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:26:16,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:26:16,324 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 09:26:16,374 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:26:16,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:26:16,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:26:16,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:26:16,380 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:26:16,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:26:16,380 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:26:16,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:26:16,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:26:16,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:26:16,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:26:16,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:26:16,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:26:16,383 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:26:16,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:26:16,383 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:26:16,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:26:16,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:26:16,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:26:16,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:26:16,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:26:16,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:26:16,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:26:16,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:26:16,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:26:16,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:26:16,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:26:16,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:26:16,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:26:16,387 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:26:16,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:26:16,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:26:16,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:26:16,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:26:16,886 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:26:16,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/scalar_loopdep.i [2020-10-28 09:26:16,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3bb6f25b/4c1f042310234a5cbebccb05b91f3956/FLAGe7d00d71c [2020-10-28 09:26:17,631 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:26:17,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/scalar_loopdep.i [2020-10-28 09:26:17,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3bb6f25b/4c1f042310234a5cbebccb05b91f3956/FLAGe7d00d71c [2020-10-28 09:26:17,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b3bb6f25b/4c1f042310234a5cbebccb05b91f3956 [2020-10-28 09:26:17,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:26:17,999 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:26:18,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:26:18,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:26:18,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:26:18,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:26:17" (1/1) ... [2020-10-28 09:26:18,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dee31a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:18, skipping insertion in model container [2020-10-28 09:26:18,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:26:17" (1/1) ... [2020-10-28 09:26:18,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:26:18,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:26:18,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:26:20,000 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:26:20,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:26:20,072 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:26:20,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:20 WrapperNode [2020-10-28 09:26:20,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:26:20,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:26:20,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:26:20,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:26:20,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:20" (1/1) ... [2020-10-28 09:26:20,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:20" (1/1) ... [2020-10-28 09:26:20,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:20" (1/1) ... [2020-10-28 09:26:20,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:20" (1/1) ... [2020-10-28 09:26:20,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:20" (1/1) ... [2020-10-28 09:26:20,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:20" (1/1) ... [2020-10-28 09:26:20,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:20" (1/1) ... [2020-10-28 09:26:20,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:26:20,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:26:20,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:26:20,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:26:20,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:20" (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 09:26:20,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:26:20,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:26:20,260 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:26:20,261 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:26:20,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:26:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:26:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:26:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:26:20,261 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:26:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:26:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:26:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:26:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:26:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:26:20,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:26:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:26:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:26:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:26:20,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:26:20,606 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:26:20,606 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 09:26:20,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:26:20 BoogieIcfgContainer [2020-10-28 09:26:20,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:26:20,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:26:20,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:26:20,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:26:20,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:26:17" (1/3) ... [2020-10-28 09:26:20,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32aa8faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:26:20, skipping insertion in model container [2020-10-28 09:26:20,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:20" (2/3) ... [2020-10-28 09:26:20,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32aa8faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:26:20, skipping insertion in model container [2020-10-28 09:26:20,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:26:20" (3/3) ... [2020-10-28 09:26:20,617 INFO L111 eAbstractionObserver]: Analyzing ICFG scalar_loopdep.i [2020-10-28 09:26:20,630 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:26:20,635 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:26:20,649 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:26:20,677 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:26:20,677 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:26:20,677 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:26:20,678 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:26:20,678 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:26:20,678 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:26:20,678 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:26:20,678 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:26:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-28 09:26:20,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 09:26:20,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:20,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:20,704 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:20,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:20,711 INFO L82 PathProgramCache]: Analyzing trace with hash 242942612, now seen corresponding path program 1 times [2020-10-28 09:26:20,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:20,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158443084] [2020-10-28 09:26:20,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:20,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:21,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:21,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 09:26:21,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:21,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-28 09:26:21,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:21,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:26:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:21,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:26:21,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:21,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:21,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:21,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:21,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:21,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 09:26:21,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:21,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:21,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:21,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:21,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:21,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:21,198 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 09:26:21,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158443084] [2020-10-28 09:26:21,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:26:21,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:26:21,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050184879] [2020-10-28 09:26:21,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:26:21,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:21,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:26:21,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:26:21,225 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-28 09:26:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:21,354 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2020-10-28 09:26:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:26:21,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-28 09:26:21,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:21,366 INFO L225 Difference]: With dead ends: 56 [2020-10-28 09:26:21,367 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 09:26:21,370 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 09:26:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 09:26:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2020-10-28 09:26:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 09:26:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-28 09:26:21,420 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2020-10-28 09:26:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:21,421 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-28 09:26:21,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:26:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-28 09:26:21,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 09:26:21,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:21,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:21,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:26:21,423 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:21,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:21,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1797232498, now seen corresponding path program 1 times [2020-10-28 09:26:21,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:21,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576065980] [2020-10-28 09:26:21,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:21,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:21,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:21,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 09:26:21,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:21,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-28 09:26:21,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:21,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:21,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:26:21,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:21,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:26:21,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:21,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:21,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:21,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:21,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:21,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:21,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 09:26:21,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:21,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:21,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:21,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:21,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:21,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:21,667 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 09:26:21,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576065980] [2020-10-28 09:26:21,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:26:21,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:26:21,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879770835] [2020-10-28 09:26:21,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:26:21,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:21,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:26:21,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:26:21,672 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-10-28 09:26:21,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:21,846 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-28 09:26:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:26:21,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 09:26:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:21,849 INFO L225 Difference]: With dead ends: 40 [2020-10-28 09:26:21,849 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 09:26:21,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:26:21,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 09:26:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-10-28 09:26:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 09:26:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-28 09:26:21,860 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2020-10-28 09:26:21,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:21,860 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-28 09:26:21,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:26:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-28 09:26:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:26:21,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:21,862 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 09:26:21,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:26:21,862 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:21,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:21,863 INFO L82 PathProgramCache]: Analyzing trace with hash 439108588, now seen corresponding path program 1 times [2020-10-28 09:26:21,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:21,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303637326] [2020-10-28 09:26:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:21,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:21,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:22,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:22,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:26:22,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:26:22,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-28 09:26:22,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:22,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:26:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:26:22,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:26:22,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:22,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:22,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:22,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:22,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:22,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:26:22,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:22,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:22,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:22,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:22,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:22,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:22,637 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 09:26:22,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303637326] [2020-10-28 09:26:22,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:22,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:26:22,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679319684] [2020-10-28 09:26:22,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:26:22,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:22,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:26:22,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:26:22,644 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2020-10-28 09:26:22,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:22,930 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-28 09:26:22,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:26:22,932 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 09:26:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:22,934 INFO L225 Difference]: With dead ends: 46 [2020-10-28 09:26:22,934 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 09:26:22,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:26:22,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 09:26:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-10-28 09:26:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 09:26:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-28 09:26:22,955 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 17 [2020-10-28 09:26:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:22,956 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-28 09:26:22,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:26:22,956 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-28 09:26:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 09:26:22,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:22,959 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:22,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:26:22,960 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:22,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2079244234, now seen corresponding path program 2 times [2020-10-28 09:26:22,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:22,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073777414] [2020-10-28 09:26:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:22,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:23,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:23,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:23,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 09:26:23,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:26:23,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-28 09:26:23,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:23,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:23,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:26:23,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:23,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:26:23,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:23,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:23,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:23,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:23,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:23,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:23,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:26:23,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:23,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:23,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:23,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:23,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:23,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:26:23,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073777414] [2020-10-28 09:26:23,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:23,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:26:23,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127432257] [2020-10-28 09:26:23,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:26:23,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:23,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:26:23,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:26:23,532 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-10-28 09:26:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:23,796 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-10-28 09:26:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:26:23,797 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-28 09:26:23,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:23,798 INFO L225 Difference]: With dead ends: 52 [2020-10-28 09:26:23,798 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 09:26:23,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:26:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 09:26:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2020-10-28 09:26:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 09:26:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-28 09:26:23,807 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2020-10-28 09:26:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:23,807 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-28 09:26:23,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:26:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-28 09:26:23,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 09:26:23,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:23,808 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:23,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:26:23,809 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:23,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1996602408, now seen corresponding path program 3 times [2020-10-28 09:26:23,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:23,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689962818] [2020-10-28 09:26:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:23,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:23,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:24,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:24,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 09:26:24,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:26:24,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-28 09:26:24,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:24,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:24,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:26:24,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:24,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:26:24,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:24,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:24,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:24,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:24,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:24,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:24,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:26:24,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:24,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:24,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:26:24,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689962818] [2020-10-28 09:26:24,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:24,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:26:24,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253223382] [2020-10-28 09:26:24,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:26:24,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:24,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:26:24,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:26:24,564 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-10-28 09:26:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:24,921 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-28 09:26:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:26:24,922 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-28 09:26:24,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:24,924 INFO L225 Difference]: With dead ends: 58 [2020-10-28 09:26:24,925 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 09:26:24,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:26:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 09:26:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2020-10-28 09:26:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 09:26:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-28 09:26:24,940 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-10-28 09:26:24,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:24,940 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-28 09:26:24,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:26:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-28 09:26:24,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 09:26:24,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:24,942 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:24,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:26:24,942 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:24,942 INFO L82 PathProgramCache]: Analyzing trace with hash -112781050, now seen corresponding path program 4 times [2020-10-28 09:26:24,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:24,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208413014] [2020-10-28 09:26:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:24,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:24,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:25,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:25,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 09:26:25,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:26:25,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-28 09:26:25,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:25,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:25,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:26:25,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:25,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:26:25,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:25,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:25,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:25,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:25,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:25,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:25,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:26:25,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:25,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:25,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:25,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:25,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:25,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:26:25,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208413014] [2020-10-28 09:26:25,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:25,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:26:25,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151340165] [2020-10-28 09:26:25,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:26:25,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:25,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:26:25,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:26:25,846 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 8 states. [2020-10-28 09:26:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:26,046 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-10-28 09:26:26,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:26:26,047 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-28 09:26:26,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:26,048 INFO L225 Difference]: With dead ends: 64 [2020-10-28 09:26:26,049 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 09:26:26,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:26:26,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 09:26:26,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2020-10-28 09:26:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:26:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-28 09:26:26,057 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 23 [2020-10-28 09:26:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:26,057 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-28 09:26:26,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:26:26,057 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-28 09:26:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:26:26,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:26,058 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:26,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:26:26,058 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:26,059 INFO L82 PathProgramCache]: Analyzing trace with hash -5720476, now seen corresponding path program 5 times [2020-10-28 09:26:26,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:26,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914646830] [2020-10-28 09:26:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:26,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:26,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:27,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:27,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:26:27,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:26:27,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-10-28 09:26:27,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:27,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:27,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:26:27,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:27,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:26:27,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:27,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:27,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:27,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:27,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:27,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:27,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:26:27,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:27,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:27,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:27,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:27,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:27,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:26:27,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914646830] [2020-10-28 09:26:27,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:27,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:26:27,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272281188] [2020-10-28 09:26:27,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:26:27,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:27,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:26:27,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:26:27,396 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2020-10-28 09:26:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:27,926 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-10-28 09:26:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:26:27,926 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-28 09:26:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:27,927 INFO L225 Difference]: With dead ends: 42 [2020-10-28 09:26:27,927 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 09:26:27,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:26:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 09:26:27,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-28 09:26:27,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 09:26:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-28 09:26:27,935 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 25 [2020-10-28 09:26:27,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:27,936 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-28 09:26:27,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:26:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-28 09:26:27,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:26:27,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:27,937 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:27,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:26:27,938 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:27,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:27,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1007509950, now seen corresponding path program 1 times [2020-10-28 09:26:27,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:27,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66305175] [2020-10-28 09:26:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:27,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:27,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:28,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:31,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:31,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 09:26:31,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:26:31,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3220 [2020-10-28 09:26:31,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:31,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:31,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:26:31,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:31,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:26:31,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 09:26:31,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:31,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:31,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:31,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:31,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:31,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 09:26:31,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:31,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:31,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:31,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:31,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:31,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:26:31,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 09:26:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:31,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:31,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:31,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:31,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:31,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:26:31,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:31,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:31,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:31,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:31,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:31,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:26:31,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66305175] [2020-10-28 09:26:31,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:31,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:26:31,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916969823] [2020-10-28 09:26:31,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:26:31,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:31,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:26:31,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:26:31,323 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 9 states. [2020-10-28 09:26:31,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:31,549 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-10-28 09:26:31,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:26:31,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-28 09:26:31,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:31,552 INFO L225 Difference]: With dead ends: 80 [2020-10-28 09:26:31,552 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 09:26:31,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:26:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 09:26:31,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2020-10-28 09:26:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:26:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-28 09:26:31,566 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2020-10-28 09:26:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:31,568 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-28 09:26:31,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:26:31,569 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-28 09:26:31,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 09:26:31,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:31,572 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:31,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:26:31,572 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:31,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1791517084, now seen corresponding path program 2 times [2020-10-28 09:26:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:31,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139619748] [2020-10-28 09:26:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:31,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:31,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:31,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:33,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:35,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:35,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 09:26:35,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:26:35,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3444 [2020-10-28 09:26:35,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:35,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:35,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:26:35,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:35,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:26:35,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:35,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:35,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:35,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:35,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:35,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:35,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:26:35,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:35,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:35,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:35,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:35,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:35,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:35,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 09:26:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:35,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:35,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:35,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:35,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:35,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:26:35,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:35,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:35,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:35,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:26:35,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139619748] [2020-10-28 09:26:35,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:35,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:26:35,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866278359] [2020-10-28 09:26:35,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:26:35,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:35,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:26:35,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:26:35,175 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 10 states. [2020-10-28 09:26:35,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:35,445 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-10-28 09:26:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:26:35,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-28 09:26:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:35,447 INFO L225 Difference]: With dead ends: 86 [2020-10-28 09:26:35,447 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 09:26:35,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:26:35,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 09:26:35,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2020-10-28 09:26:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 09:26:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-28 09:26:35,467 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2020-10-28 09:26:35,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:35,467 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-28 09:26:35,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:26:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-28 09:26:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 09:26:35,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:35,469 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:35,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:26:35,470 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash -691871238, now seen corresponding path program 3 times [2020-10-28 09:26:35,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:35,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017399063] [2020-10-28 09:26:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:35,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:35,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:35,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:36,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:39,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:39,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 09:26:39,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:26:39,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3528 [2020-10-28 09:26:39,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:39,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:39,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:26:39,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:39,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:26:39,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:39,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:39,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:39,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:39,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:39,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:39,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:26:39,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:39,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:39,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:39,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:39,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:39,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:39,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 09:26:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:39,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:39,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:39,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:39,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:39,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:39,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:39,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:39,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:39,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:39,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:39,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:26:39,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017399063] [2020-10-28 09:26:39,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:39,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:26:39,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583104183] [2020-10-28 09:26:39,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:26:39,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:39,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:26:39,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:26:39,161 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 11 states. [2020-10-28 09:26:39,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:39,443 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2020-10-28 09:26:39,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:26:39,443 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-28 09:26:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:39,445 INFO L225 Difference]: With dead ends: 92 [2020-10-28 09:26:39,445 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 09:26:39,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:26:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 09:26:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 42. [2020-10-28 09:26:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 09:26:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-28 09:26:39,461 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2020-10-28 09:26:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:39,461 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-28 09:26:39,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:26:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-28 09:26:39,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 09:26:39,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:39,466 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:39,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:26:39,466 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:39,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:39,467 INFO L82 PathProgramCache]: Analyzing trace with hash 773767896, now seen corresponding path program 4 times [2020-10-28 09:26:39,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:39,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197484515] [2020-10-28 09:26:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:39,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:39,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:40,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:41,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:43,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:43,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 09:26:43,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:26:43,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4043 [2020-10-28 09:26:43,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:43,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:43,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:26:43,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:43,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:26:43,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:44,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:44,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:44,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:44,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:44,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:44,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:26:44,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:44,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:44,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:44,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:44,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:44,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:44,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 09:26:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:44,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:44,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:44,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:44,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:44,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:26:44,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:44,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:44,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:26:44,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:44,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:26:44,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:26:44,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197484515] [2020-10-28 09:26:44,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:44,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:26:44,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481967037] [2020-10-28 09:26:44,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:26:44,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:44,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:26:44,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:26:44,113 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 18 states. [2020-10-28 09:26:45,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:45,014 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-10-28 09:26:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:26:45,016 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-28 09:26:45,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:45,017 INFO L225 Difference]: With dead ends: 56 [2020-10-28 09:26:45,017 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 09:26:45,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:26:45,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 09:26:45,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-28 09:26:45,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 09:26:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-28 09:26:45,026 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 39 [2020-10-28 09:26:45,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:45,027 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-28 09:26:45,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:26:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-28 09:26:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 09:26:45,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:45,028 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:45,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:26:45,028 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:45,029 INFO L82 PathProgramCache]: Analyzing trace with hash -122045902, now seen corresponding path program 5 times [2020-10-28 09:26:45,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:45,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032288222] [2020-10-28 09:26:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:45,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:45,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:45,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:46,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:46,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:47,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:47,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:50,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:50,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 09:26:50,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:26:50,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:26:50,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:50,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:50,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:26:50,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:50,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:26:50,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:50,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:50,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:50,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:50,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:50,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:50,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 09:26:50,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:50,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:50,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 09:26:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:50,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:50,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:50,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:50,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:50,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:26:50,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:50,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:50,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:50,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:50,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:50,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:50,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:26:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:50,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:50,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:50,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:50,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:50,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:50,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:50,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:50,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:50,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:50,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:50,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:26:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 64 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:26:50,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032288222] [2020-10-28 09:26:50,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:50,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:26:50,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148396310] [2020-10-28 09:26:50,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:26:50,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:50,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:26:50,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:26:50,238 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 12 states. [2020-10-28 09:26:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:50,520 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2020-10-28 09:26:50,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:26:50,521 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-28 09:26:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:50,522 INFO L225 Difference]: With dead ends: 110 [2020-10-28 09:26:50,522 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 09:26:50,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:26:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 09:26:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 52. [2020-10-28 09:26:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 09:26:50,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-28 09:26:50,543 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2020-10-28 09:26:50,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:50,543 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-28 09:26:50,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:26:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-28 09:26:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 09:26:50,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:50,550 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:50,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:26:50,551 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:50,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:50,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1427152272, now seen corresponding path program 6 times [2020-10-28 09:26:50,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:50,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407477855] [2020-10-28 09:26:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:50,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:50,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:50,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:52,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:52,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:53,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:53,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:55,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:55,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 09:26:55,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:26:55,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:26:55,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:55,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:55,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:26:55,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:26:55,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:26:55,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:55,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:26:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:55,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:55,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:55,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:26:55,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:55,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:26:55,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:55,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:55,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:55,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:26:55,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:55,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:55,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 09:26:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:55,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:55,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:55,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:55,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:55,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:55,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:55,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:55,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:55,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:55,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:55,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:55,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 09:26:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:55,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:55,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:26:55,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:26:55,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:26:55,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:26:55,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:26:55,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:26:55,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:26:55,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:26:55,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:26:55,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:26:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:26:55,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407477855] [2020-10-28 09:26:55,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:26:55,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:26:55,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805626573] [2020-10-28 09:26:55,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:26:55,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:26:55,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:26:55,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:26:55,740 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 13 states. [2020-10-28 09:26:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:26:56,093 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-10-28 09:26:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:26:56,094 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-28 09:26:56,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:26:56,095 INFO L225 Difference]: With dead ends: 116 [2020-10-28 09:26:56,095 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 09:26:56,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:26:56,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 09:26:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2020-10-28 09:26:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 09:26:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-28 09:26:56,107 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2020-10-28 09:26:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:26:56,108 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-28 09:26:56,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:26:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-28 09:26:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 09:26:56,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:26:56,109 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:26:56,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:26:56,109 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:26:56,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:26:56,110 INFO L82 PathProgramCache]: Analyzing trace with hash -147054226, now seen corresponding path program 7 times [2020-10-28 09:26:56,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:26:56,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576447009] [2020-10-28 09:26:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:26:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:26:56,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:56,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:56,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:56,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:57,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:58,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:26:59,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:01,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:01,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:27:01,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:27:01,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:27:01,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:01,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:01,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:27:01,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:27:01,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:27:01,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:01,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:01,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:01,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:01,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:01,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:01,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:27:01,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:01,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:01,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:01,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:01,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:01,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:01,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 09:27:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:01,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:01,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:01,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:01,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:01,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:01,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:01,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:01,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:01,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:01,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:01,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:01,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 09:27:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:01,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:01,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:01,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:01,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:01,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:01,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:01,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:01,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:01,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:01,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:01,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:27:01,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576447009] [2020-10-28 09:27:01,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:01,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:27:01,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841861024] [2020-10-28 09:27:01,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:27:01,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:01,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:27:01,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:27:01,326 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 14 states. [2020-10-28 09:27:01,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:01,709 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2020-10-28 09:27:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:27:01,709 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-10-28 09:27:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:01,710 INFO L225 Difference]: With dead ends: 122 [2020-10-28 09:27:01,711 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 09:27:01,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:27:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 09:27:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 56. [2020-10-28 09:27:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:27:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-28 09:27:01,727 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2020-10-28 09:27:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:01,727 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-28 09:27:01,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:27:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-28 09:27:01,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 09:27:01,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:01,729 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:01,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:27:01,729 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1131010612, now seen corresponding path program 8 times [2020-10-28 09:27:01,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:01,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472551403] [2020-10-28 09:27:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:01,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:01,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:01,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:02,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:03,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:04,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:04,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:05,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:06,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:06,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 09:27:06,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:27:06,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:27:06,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:06,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:06,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:27:06,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:27:06,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:27:06,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:06,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:06,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:06,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:06,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:06,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:06,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:27:06,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:06,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:06,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:06,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:06,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:06,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:06,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 09:27:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:06,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:06,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:06,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:06,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:06,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:06,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:06,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:06,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:06,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 09:27:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:06,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:06,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:06,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:06,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:06,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:06,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:06,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:06,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:06,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:27:06,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472551403] [2020-10-28 09:27:06,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:06,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:27:06,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454644747] [2020-10-28 09:27:06,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:27:06,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:06,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:27:06,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:27:06,948 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 15 states. [2020-10-28 09:27:07,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:07,325 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2020-10-28 09:27:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:27:07,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-28 09:27:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:07,328 INFO L225 Difference]: With dead ends: 128 [2020-10-28 09:27:07,329 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 09:27:07,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:27:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 09:27:07,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 58. [2020-10-28 09:27:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 09:27:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-28 09:27:07,342 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2020-10-28 09:27:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:07,343 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-28 09:27:07,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:27:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-28 09:27:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 09:27:07,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:07,344 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:07,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:27:07,344 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:07,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:07,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1820292438, now seen corresponding path program 9 times [2020-10-28 09:27:07,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:07,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274226528] [2020-10-28 09:27:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:07,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:07,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:07,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:08,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:08,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:10,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:10,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:11,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:12,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:12,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 09:27:12,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:27:12,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:27:12,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:12,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:12,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:27:12,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:27:12,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 09:27:12,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:13,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:13,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:13,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:13,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:13,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:13,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:27:13,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:13,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:13,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:13,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:13,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:13,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:13,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:27:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:13,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:13,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:13,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:13,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:13,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:27:13,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:13,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:13,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:27:13,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:13,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:27:13,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:13,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:27:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:13,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:13,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:13,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:13,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:13,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:27:13,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:13,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:13,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:27:13,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:13,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:27:13,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 76 proven. 80 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 09:27:13,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274226528] [2020-10-28 09:27:13,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:13,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:27:13,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900580941] [2020-10-28 09:27:13,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:27:13,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:13,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:27:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:27:13,332 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 24 states. [2020-10-28 09:27:14,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:14,552 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2020-10-28 09:27:14,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:27:14,554 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-28 09:27:14,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:14,555 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:27:14,555 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 09:27:14,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:27:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 09:27:14,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-28 09:27:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 09:27:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-10-28 09:27:14,567 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 55 [2020-10-28 09:27:14,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:14,568 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-10-28 09:27:14,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:27:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-10-28 09:27:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 09:27:14,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:14,569 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:14,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:27:14,569 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:14,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:14,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1065848836, now seen corresponding path program 10 times [2020-10-28 09:27:14,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:14,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420956840] [2020-10-28 09:27:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:14,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:14,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:14,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:15,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:16,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:17,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:19,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:19,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 09:27:19,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:27:19,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:27:19,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:19,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:19,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:27:19,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:27:19,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:27:19,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:19,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:19,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:19,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:19,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:19,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:19,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:27:19,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:19,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:19,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:19,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:19,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:19,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:27:19,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 09:27:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:19,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:19,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:19,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:19,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:19,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:27:19,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:19,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:19,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:19,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:19,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:19,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:27:19,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:27:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:19,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:19,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:19,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:19,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:19,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:27:19,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:19,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:19,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:19,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:19,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:19,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:19,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 09:27:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:19,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:19,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:19,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:19,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:19,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:19,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:19,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:19,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:19,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:19,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:19,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 6 proven. 144 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:27:19,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420956840] [2020-10-28 09:27:19,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:19,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:27:19,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381544407] [2020-10-28 09:27:19,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:27:19,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:19,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:27:19,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:27:19,887 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 16 states. [2020-10-28 09:27:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:20,302 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2020-10-28 09:27:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:27:20,303 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-28 09:27:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:20,304 INFO L225 Difference]: With dead ends: 146 [2020-10-28 09:27:20,304 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 09:27:20,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:27:20,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 09:27:20,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 68. [2020-10-28 09:27:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 09:27:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-28 09:27:20,327 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2020-10-28 09:27:20,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:20,327 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-28 09:27:20,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:27:20,327 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-28 09:27:20,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 09:27:20,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:20,328 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:20,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:27:20,329 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:20,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1847064418, now seen corresponding path program 11 times [2020-10-28 09:27:20,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:20,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720148913] [2020-10-28 09:27:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:20,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:20,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:20,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:21,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:21,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:23,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:23,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:23,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:23,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:24,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:24,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:25,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:25,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 09:27:25,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:27:25,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:27:25,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:25,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:25,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:27:25,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:27:25,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:27:25,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:25,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:25,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:25,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:25,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:25,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:25,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:27:25,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:25,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:25,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:25,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:25,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:25,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:27:25,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 09:27:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:25,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:25,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:25,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:25,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:25,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:25,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:25,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:25,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:25,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:25,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:25,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:27:25,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:27:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:25,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:25,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:25,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:25,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:25,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:25,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:25,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:25,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:25,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:25,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:25,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:25,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:27:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:25,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:25,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:25,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:25,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:25,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:27:25,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:25,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:25,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:25,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:25,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:25,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:27:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 6 proven. 169 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:27:25,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720148913] [2020-10-28 09:27:25,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:25,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:27:25,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993115360] [2020-10-28 09:27:25,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:27:25,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:25,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:27:25,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:27:25,642 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 17 states. [2020-10-28 09:27:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:26,215 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2020-10-28 09:27:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:27:26,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-10-28 09:27:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:26,218 INFO L225 Difference]: With dead ends: 152 [2020-10-28 09:27:26,218 INFO L226 Difference]: Without dead ends: 117 [2020-10-28 09:27:26,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:27:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-28 09:27:26,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 70. [2020-10-28 09:27:26,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 09:27:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-28 09:27:26,242 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2020-10-28 09:27:26,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:26,242 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-28 09:27:26,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:27:26,242 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-28 09:27:26,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:27:26,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:26,247 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:26,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:27:26,247 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:26,248 INFO L82 PathProgramCache]: Analyzing trace with hash 975961920, now seen corresponding path program 12 times [2020-10-28 09:27:26,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:26,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281174728] [2020-10-28 09:27:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:26,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:26,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:26,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:27,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:27,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:28,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:29,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:29,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:30,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:31,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:31,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 09:27:31,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:27:31,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:27:31,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:31,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:31,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:27:31,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:27:31,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:27:31,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:31,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:31,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:31,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:31,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:31,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:31,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:27:31,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:31,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:31,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:31,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:31,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:31,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:31,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 09:27:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:31,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:31,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:31,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:31,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:31,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:31,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:31,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:31,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:31,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:31,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:31,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:31,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 09:27:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:31,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:31,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:31,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:31,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:31,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:31,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:31,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:31,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:31,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:31,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:31,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:31,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:27:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:31,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:31,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:31,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:31,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:31,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:31,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:31,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:31,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:31,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:31,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:31,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 6 proven. 196 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:27:31,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281174728] [2020-10-28 09:27:31,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:31,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:27:31,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536014782] [2020-10-28 09:27:31,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:27:31,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:31,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:27:31,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:27:31,543 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 18 states. [2020-10-28 09:27:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:31,970 INFO L93 Difference]: Finished difference Result 158 states and 172 transitions. [2020-10-28 09:27:31,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:27:31,971 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-10-28 09:27:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:31,972 INFO L225 Difference]: With dead ends: 158 [2020-10-28 09:27:31,972 INFO L226 Difference]: Without dead ends: 123 [2020-10-28 09:27:31,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:27:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-28 09:27:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 72. [2020-10-28 09:27:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:27:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-10-28 09:27:31,990 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2020-10-28 09:27:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:31,991 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-10-28 09:27:31,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:27:31,991 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-10-28 09:27:31,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:27:31,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:31,994 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:31,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:27:31,995 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:31,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:31,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1365084062, now seen corresponding path program 13 times [2020-10-28 09:27:31,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:31,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876867580] [2020-10-28 09:27:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:32,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:32,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:32,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:32,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:33,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:33,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:33,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:34,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:34,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:35,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:35,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:36,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:36,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:37,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:37,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 09:27:37,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:27:37,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:27:37,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:37,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:37,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:27:37,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:27:37,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:27:37,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:37,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:37,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:37,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:37,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:37,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:37,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:27:37,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:37,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:37,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:37,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:37,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:37,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:37,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 09:27:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:37,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:37,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:37,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:37,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:37,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:37,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:37,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:37,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:37,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:37,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:37,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:37,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 09:27:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:37,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:37,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:37,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:37,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:37,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:37,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:37,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:37,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:37,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:37,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:37,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:37,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:27:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:37,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:37,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:37,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:37,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:37,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:27:37,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:37,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:37,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:37,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:37,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:37,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 6 proven. 225 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:27:37,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876867580] [2020-10-28 09:27:37,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:37,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:27:37,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454278035] [2020-10-28 09:27:37,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:27:37,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:37,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:27:37,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:27:37,319 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 19 states. [2020-10-28 09:27:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:37,824 INFO L93 Difference]: Finished difference Result 164 states and 179 transitions. [2020-10-28 09:27:37,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:27:37,824 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2020-10-28 09:27:37,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:37,826 INFO L225 Difference]: With dead ends: 164 [2020-10-28 09:27:37,827 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 09:27:37,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:27:37,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 09:27:37,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 74. [2020-10-28 09:27:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 09:27:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-10-28 09:27:37,840 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 69 [2020-10-28 09:27:37,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:37,840 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-10-28 09:27:37,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:27:37,840 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-10-28 09:27:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 09:27:37,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:37,841 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:37,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:27:37,842 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:37,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1649307772, now seen corresponding path program 14 times [2020-10-28 09:27:37,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:37,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309011911] [2020-10-28 09:27:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:37,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:37,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:38,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:38,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:40,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:41,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:41,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:42,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:42,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 09:27:42,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:27:42,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:27:42,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:42,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:42,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:27:42,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:27:42,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:27:42,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:43,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:43,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:43,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:43,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:43,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:43,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:27:43,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:43,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:43,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:43,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:43,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:43,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:43,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 09:27:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:43,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:43,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:43,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:43,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:43,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:43,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:43,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:43,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:43,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:43,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:43,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:43,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 09:27:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:43,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:43,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:43,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:43,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:43,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:43,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:43,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:43,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:43,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:43,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:43,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:43,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:27:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:43,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:43,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:43,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:43,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:43,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:43,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:43,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:43,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:43,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:43,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:43,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 6 proven. 256 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:27:43,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309011911] [2020-10-28 09:27:43,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:43,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:27:43,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019152450] [2020-10-28 09:27:43,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:27:43,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:43,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:27:43,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:27:43,201 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 20 states. [2020-10-28 09:27:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:43,766 INFO L93 Difference]: Finished difference Result 170 states and 186 transitions. [2020-10-28 09:27:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:27:43,767 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 71 [2020-10-28 09:27:43,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:43,770 INFO L225 Difference]: With dead ends: 170 [2020-10-28 09:27:43,770 INFO L226 Difference]: Without dead ends: 135 [2020-10-28 09:27:43,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:27:43,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-28 09:27:43,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 76. [2020-10-28 09:27:43,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:27:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-28 09:27:43,782 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2020-10-28 09:27:43,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:43,783 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-28 09:27:43,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:27:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-28 09:27:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:27:43,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:43,784 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:43,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:27:43,788 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:43,789 INFO L82 PathProgramCache]: Analyzing trace with hash -89613862, now seen corresponding path program 15 times [2020-10-28 09:27:43,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:43,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739031574] [2020-10-28 09:27:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:43,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:43,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:44,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:45,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:45,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:46,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:46,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:46,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:46,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:48,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:48,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:48,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 09:27:48,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:27:48,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 09:27:48,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:48,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:48,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:27:48,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:27:48,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:27:48,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:49,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:49,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:49,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:49,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:49,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:49,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:27:49,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:49,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:49,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:49,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:49,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:49,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:49,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 09:27:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:49,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:49,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:49,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:49,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:49,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:49,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:49,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:49,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:49,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:49,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:49,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:49,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:27:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:49,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:49,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:49,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:49,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:49,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:49,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:49,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:49,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:49,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:49,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:49,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:49,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:27:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:49,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:49,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:49,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:49,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:49,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:49,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:49,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:49,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:49,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:49,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:49,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 6 proven. 289 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:27:49,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739031574] [2020-10-28 09:27:49,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:49,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:27:49,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183683229] [2020-10-28 09:27:49,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:27:49,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:49,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:27:49,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:27:49,238 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 21 states. [2020-10-28 09:27:49,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:49,759 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2020-10-28 09:27:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:27:49,762 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 73 [2020-10-28 09:27:49,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:49,766 INFO L225 Difference]: With dead ends: 176 [2020-10-28 09:27:49,766 INFO L226 Difference]: Without dead ends: 141 [2020-10-28 09:27:49,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:27:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-28 09:27:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 78. [2020-10-28 09:27:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 09:27:49,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-10-28 09:27:49,789 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2020-10-28 09:27:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:49,789 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-10-28 09:27:49,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:27:49,790 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-10-28 09:27:49,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 09:27:49,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:49,793 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:49,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:27:49,794 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:49,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:49,796 INFO L82 PathProgramCache]: Analyzing trace with hash -451025992, now seen corresponding path program 16 times [2020-10-28 09:27:49,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:49,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432595432] [2020-10-28 09:27:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:49,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:49,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:50,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:51,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:52,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:52,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:52,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:53,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:53,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:53,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:54,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:54,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:54,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 09:27:54,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:27:54,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:27:54,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:54,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:54,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:27:54,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:27:54,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:27:54,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:55,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:27:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:55,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:55,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:55,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:27:55,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:55,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:27:55,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:55,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:55,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:55,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:27:55,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:55,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:55,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 09:27:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:55,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:55,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:55,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:55,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:55,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:27:55,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:55,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:55,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:55,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:55,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:55,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:55,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:27:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:55,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:55,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:55,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:55,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:55,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:55,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:55,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:55,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:55,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:55,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:55,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:55,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:27:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:55,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:55,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:27:55,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:27:55,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:27:55,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:27:55,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:27:55,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:27:55,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:27:55,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:27:55,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:27:55,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:27:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 6 proven. 324 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:27:55,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432595432] [2020-10-28 09:27:55,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:27:55,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:27:55,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778884704] [2020-10-28 09:27:55,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:27:55,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:27:55,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:27:55,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:27:55,244 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 22 states. [2020-10-28 09:27:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:27:55,804 INFO L93 Difference]: Finished difference Result 182 states and 200 transitions. [2020-10-28 09:27:55,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:27:55,805 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 75 [2020-10-28 09:27:55,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:27:55,808 INFO L225 Difference]: With dead ends: 182 [2020-10-28 09:27:55,808 INFO L226 Difference]: Without dead ends: 147 [2020-10-28 09:27:55,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:27:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-28 09:27:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 80. [2020-10-28 09:27:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 09:27:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-28 09:27:55,821 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2020-10-28 09:27:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:27:55,822 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-28 09:27:55,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:27:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-28 09:27:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 09:27:55,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:27:55,823 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:27:55,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:27:55,823 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:27:55,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:27:55,823 INFO L82 PathProgramCache]: Analyzing trace with hash 124268054, now seen corresponding path program 17 times [2020-10-28 09:27:55,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:27:55,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89995669] [2020-10-28 09:27:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:27:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:27:55,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:55,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:56,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:57,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:59,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:27:59,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:00,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:00,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:00,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 09:28:00,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:28:00,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:28:00,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:00,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:00,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:28:00,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:00,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:28:00,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:01,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:01,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:01,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:01,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:01,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:01,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:28:01,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:01,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:01,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:01,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:01,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:01,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:01,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 09:28:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:01,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:01,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:01,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:01,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:01,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:01,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:01,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:01,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:01,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:01,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:01,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:01,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:28:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:01,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:01,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:01,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:01,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:01,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:28:01,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:01,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:01,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:01,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:01,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:01,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:01,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:28:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:01,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:01,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:01,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:01,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:01,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:01,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:01,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:01,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:01,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:01,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:01,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 6 proven. 361 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:28:01,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89995669] [2020-10-28 09:28:01,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:01,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:28:01,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285759955] [2020-10-28 09:28:01,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:28:01,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:01,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:28:01,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:28:01,280 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 23 states. [2020-10-28 09:28:01,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:01,896 INFO L93 Difference]: Finished difference Result 188 states and 207 transitions. [2020-10-28 09:28:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:28:01,897 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2020-10-28 09:28:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:01,899 INFO L225 Difference]: With dead ends: 188 [2020-10-28 09:28:01,899 INFO L226 Difference]: Without dead ends: 153 [2020-10-28 09:28:01,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:28:01,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-28 09:28:01,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2020-10-28 09:28:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 09:28:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-28 09:28:01,914 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2020-10-28 09:28:01,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:01,915 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-28 09:28:01,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:28:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-28 09:28:01,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 09:28:01,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:01,916 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:01,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:28:01,916 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:01,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:01,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1068934924, now seen corresponding path program 18 times [2020-10-28 09:28:01,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:01,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768883852] [2020-10-28 09:28:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:01,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:02,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:02,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:03,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:04,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:06,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:06,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 09:28:06,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:28:06,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:28:06,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:06,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:06,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:28:06,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:06,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:28:06,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:07,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:07,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:07,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:07,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:07,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:07,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:07,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:07,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:07,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:07,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:07,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:07,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:07,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 09:28:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:07,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:07,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:07,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:07,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:07,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:07,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:07,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:07,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:07,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:07,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:07,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:07,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:28:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:07,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:07,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:07,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:07,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:07,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:07,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:07,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:07,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:07,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 09:28:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:07,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:07,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:07,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:07,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:07,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:07,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:07,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:07,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:07,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:07,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:07,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 6 proven. 400 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:28:07,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768883852] [2020-10-28 09:28:07,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:07,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:28:07,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8182372] [2020-10-28 09:28:07,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:28:07,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:07,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:28:07,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:28:07,396 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 24 states. [2020-10-28 09:28:08,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:08,158 INFO L93 Difference]: Finished difference Result 194 states and 214 transitions. [2020-10-28 09:28:08,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:28:08,159 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 79 [2020-10-28 09:28:08,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:08,161 INFO L225 Difference]: With dead ends: 194 [2020-10-28 09:28:08,161 INFO L226 Difference]: Without dead ends: 159 [2020-10-28 09:28:08,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:28:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-28 09:28:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 84. [2020-10-28 09:28:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:28:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-10-28 09:28:08,181 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2020-10-28 09:28:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:08,182 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-10-28 09:28:08,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:28:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-10-28 09:28:08,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 09:28:08,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:08,183 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:08,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:28:08,183 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:08,183 INFO L82 PathProgramCache]: Analyzing trace with hash -980728750, now seen corresponding path program 19 times [2020-10-28 09:28:08,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:08,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701734664] [2020-10-28 09:28:08,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:08,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:08,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:08,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:10,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:10,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:12,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:12,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:12,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:13,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:13,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 09:28:13,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:28:13,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:28:13,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:13,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:13,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:28:13,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:13,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:28:13,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:13,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:13,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:13,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:13,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:13,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:13,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:13,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:13,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:13,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:13,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:13,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:13,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:13,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 09:28:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:13,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:13,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:13,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:13,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:13,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:13,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:13,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:13,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:13,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:13,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:13,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:13,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:28:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:13,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:13,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:13,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:13,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:13,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:28:13,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:13,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:13,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:13,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 09:28:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:13,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:13,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:13,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:13,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:13,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:28:13,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:13,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:13,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:13,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 6 proven. 441 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:28:13,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701734664] [2020-10-28 09:28:13,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:13,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:28:13,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348011088] [2020-10-28 09:28:13,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:28:13,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:13,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:28:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:28:13,692 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 25 states. [2020-10-28 09:28:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:14,510 INFO L93 Difference]: Finished difference Result 200 states and 221 transitions. [2020-10-28 09:28:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:28:14,511 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2020-10-28 09:28:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:14,513 INFO L225 Difference]: With dead ends: 200 [2020-10-28 09:28:14,515 INFO L226 Difference]: Without dead ends: 165 [2020-10-28 09:28:14,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:28:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-28 09:28:14,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 86. [2020-10-28 09:28:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 09:28:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-10-28 09:28:14,538 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2020-10-28 09:28:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:14,539 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-10-28 09:28:14,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:28:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-10-28 09:28:14,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 09:28:14,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:14,540 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:14,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:28:14,540 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:14,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:14,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2113941456, now seen corresponding path program 20 times [2020-10-28 09:28:14,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:14,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365770208] [2020-10-28 09:28:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:14,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:14,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:15,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:16,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:17,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:18,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:18,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:19,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:19,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:28:19,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:28:19,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:28:19,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:19,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:19,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:28:19,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:19,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:28:19,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:20,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:20,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:20,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:20,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:20,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:20,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:20,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:20,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:20,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:20,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:20,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:20,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:20,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-28 09:28:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:20,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:20,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:20,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:20,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:20,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:20,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:20,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:20,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:20,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:20,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:20,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:20,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:28:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:20,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:20,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:20,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:20,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:20,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:20,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:20,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:20,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:20,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:20,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:20,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:20,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 09:28:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:20,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:20,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:20,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:20,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:20,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:20,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:20,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:20,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:20,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:20,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:20,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 6 proven. 484 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:28:20,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365770208] [2020-10-28 09:28:20,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:20,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:28:20,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092015711] [2020-10-28 09:28:20,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:28:20,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:20,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:28:20,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:28:20,107 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 26 states. [2020-10-28 09:28:20,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:20,832 INFO L93 Difference]: Finished difference Result 206 states and 228 transitions. [2020-10-28 09:28:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:28:20,833 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 83 [2020-10-28 09:28:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:20,835 INFO L225 Difference]: With dead ends: 206 [2020-10-28 09:28:20,835 INFO L226 Difference]: Without dead ends: 171 [2020-10-28 09:28:20,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:28:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-28 09:28:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 88. [2020-10-28 09:28:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-28 09:28:20,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-10-28 09:28:20,856 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2020-10-28 09:28:20,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:20,859 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-10-28 09:28:20,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:28:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-10-28 09:28:20,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:28:20,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:20,860 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:20,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:28:20,860 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:20,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:20,861 INFO L82 PathProgramCache]: Analyzing trace with hash -209658738, now seen corresponding path program 21 times [2020-10-28 09:28:20,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:20,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467181562] [2020-10-28 09:28:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:20,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:21,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:22,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:23,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:25,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:26,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:26,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 09:28:26,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:28:26,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5151 [2020-10-28 09:28:26,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:26,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:26,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:28:26,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:26,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-28 09:28:26,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:29,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:29,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:29,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:29,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:29,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:29,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:29,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:29,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:29,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:29,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:29,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:29,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:29,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:28:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:29,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:29,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:29,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:29,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:29,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:29,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:29,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:29,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:29,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:29,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:29,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:29,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:28:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:29,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:29,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:29,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:29,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:29,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:29,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:29,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:29,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:29,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:29,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 09:28:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:29,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:29,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:29,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:29,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:29,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:29,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:29,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:28:29,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:29,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:28:29,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 348 proven. 205 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:28:29,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467181562] [2020-10-28 09:28:29,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:29,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:28:29,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581653496] [2020-10-28 09:28:29,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:28:29,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:29,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:28:29,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:28:29,082 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 37 states. [2020-10-28 09:28:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:31,265 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2020-10-28 09:28:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-28 09:28:31,265 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 85 [2020-10-28 09:28:31,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:31,267 INFO L225 Difference]: With dead ends: 102 [2020-10-28 09:28:31,267 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 09:28:31,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=869, Invalid=3291, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 09:28:31,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 09:28:31,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-10-28 09:28:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:28:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-10-28 09:28:31,288 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 85 [2020-10-28 09:28:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:31,288 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-10-28 09:28:31,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:28:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-10-28 09:28:31,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 09:28:31,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:31,290 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:31,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:28:31,290 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:31,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:31,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1402584552, now seen corresponding path program 22 times [2020-10-28 09:28:31,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:31,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435109184] [2020-10-28 09:28:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:31,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:31,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:32,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:33,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:35,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:36,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:36,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 09:28:36,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:28:36,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:28:36,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:36,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:36,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:28:36,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:36,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 09:28:36,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:36,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:36,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:36,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:36,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:36,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:36,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:28:36,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:36,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:36,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:36,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:36,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:36,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:36,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-28 09:28:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:36,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:36,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:36,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:36,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:36,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:28:36,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:36,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:36,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:36,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:36,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:36,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:36,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:28:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:36,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:36,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:36,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:36,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:36,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:36,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:36,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:36,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:36,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:36,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:36,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:36,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 09:28:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:36,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:36,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:36,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:36,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:36,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:28:36,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:36,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:36,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:36,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:36,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:36,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:36,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-28 09:28:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:36,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:36,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:36,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:36,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:36,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:36,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:36,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:36,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:36,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:36,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:36,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 8 proven. 529 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:28:36,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435109184] [2020-10-28 09:28:36,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:36,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:28:36,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68730267] [2020-10-28 09:28:36,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:28:36,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:36,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:28:36,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:28:36,872 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 27 states. [2020-10-28 09:28:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:37,771 INFO L93 Difference]: Finished difference Result 224 states and 246 transitions. [2020-10-28 09:28:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:28:37,772 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 93 [2020-10-28 09:28:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:37,774 INFO L225 Difference]: With dead ends: 224 [2020-10-28 09:28:37,774 INFO L226 Difference]: Without dead ends: 181 [2020-10-28 09:28:37,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:28:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-28 09:28:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 98. [2020-10-28 09:28:37,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-28 09:28:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-10-28 09:28:37,795 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 93 [2020-10-28 09:28:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:37,796 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-10-28 09:28:37,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:28:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-10-28 09:28:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 09:28:37,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:37,797 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:37,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:28:37,798 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:37,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:37,798 INFO L82 PathProgramCache]: Analyzing trace with hash -63607610, now seen corresponding path program 23 times [2020-10-28 09:28:37,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:37,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261628336] [2020-10-28 09:28:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:37,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:38,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:39,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:40,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:40,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:41,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:42,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:42,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 09:28:42,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:28:42,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:28:42,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:42,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:42,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:28:42,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:42,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 09:28:42,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:43,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:43,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:43,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:43,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:43,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:43,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:28:43,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:43,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:43,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:43,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:43,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:43,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:43,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 09:28:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:43,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:43,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:43,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:43,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:43,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:43,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:43,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:43,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:43,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:43,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:43,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:43,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 09:28:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:43,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:43,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:43,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:43,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:43,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:43,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:43,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:43,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:43,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-28 09:28:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:43,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:43,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:43,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:43,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:43,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:43,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:43,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:43,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:43,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:43,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:43,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-28 09:28:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:43,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:43,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:43,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:43,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:43,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:43,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:43,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:43,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:43,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:43,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:43,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 8 proven. 576 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:28:43,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261628336] [2020-10-28 09:28:43,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:43,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:28:43,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168564031] [2020-10-28 09:28:43,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:28:43,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:43,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:28:43,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:28:43,419 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 28 states. [2020-10-28 09:28:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:44,391 INFO L93 Difference]: Finished difference Result 230 states and 253 transitions. [2020-10-28 09:28:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:28:44,392 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 95 [2020-10-28 09:28:44,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:44,394 INFO L225 Difference]: With dead ends: 230 [2020-10-28 09:28:44,394 INFO L226 Difference]: Without dead ends: 187 [2020-10-28 09:28:44,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:28:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-28 09:28:44,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 100. [2020-10-28 09:28:44,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-28 09:28:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-10-28 09:28:44,417 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2020-10-28 09:28:44,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:44,418 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-10-28 09:28:44,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:28:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-10-28 09:28:44,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 09:28:44,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:44,419 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:44,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:28:44,419 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:44,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:44,420 INFO L82 PathProgramCache]: Analyzing trace with hash -325002204, now seen corresponding path program 24 times [2020-10-28 09:28:44,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:44,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282787692] [2020-10-28 09:28:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:44,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:44,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:45,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:47,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:49,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:49,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 09:28:49,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:28:49,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:28:49,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:49,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:49,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:28:49,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:49,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 09:28:49,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:50,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:50,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:50,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:50,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:50,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:50,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:28:50,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:50,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:50,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:50,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:50,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:50,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:50,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 09:28:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:50,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:50,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:50,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:50,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:50,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:50,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:50,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:50,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:50,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:50,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:50,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:50,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 09:28:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:50,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:50,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:50,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:50,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:50,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:50,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:50,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:50,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:50,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 09:28:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:50,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:50,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:50,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:50,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:50,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:50,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:50,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:50,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:50,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:50,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:50,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:28:50,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 09:28:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:50,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:50,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:50,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:50,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:50,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:50,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:50,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:50,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:50,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:50,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:50,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 8 proven. 625 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:28:50,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282787692] [2020-10-28 09:28:50,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:50,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:28:50,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910075061] [2020-10-28 09:28:50,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:28:50,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:50,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:28:50,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:28:50,172 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 29 states. [2020-10-28 09:28:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:51,154 INFO L93 Difference]: Finished difference Result 236 states and 260 transitions. [2020-10-28 09:28:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:28:51,155 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 97 [2020-10-28 09:28:51,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:51,156 INFO L225 Difference]: With dead ends: 236 [2020-10-28 09:28:51,156 INFO L226 Difference]: Without dead ends: 193 [2020-10-28 09:28:51,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:28:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-28 09:28:51,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 102. [2020-10-28 09:28:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 09:28:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2020-10-28 09:28:51,183 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 97 [2020-10-28 09:28:51,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:51,183 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2020-10-28 09:28:51,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:28:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2020-10-28 09:28:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-28 09:28:51,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:51,184 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:51,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:28:51,185 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:51,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1877863426, now seen corresponding path program 25 times [2020-10-28 09:28:51,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:51,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383326261] [2020-10-28 09:28:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:51,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:51,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:52,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:53,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:54,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:55,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:56,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:56,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 09:28:56,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:28:56,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:28:56,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:56,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:56,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:28:56,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:28:56,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:28:56,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:56,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:28:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:56,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:56,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:56,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:28:56,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:56,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:28:56,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:56,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:56,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:56,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:28:56,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:56,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:56,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 09:28:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:56,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:56,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:56,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:56,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:56,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:56,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:56,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:56,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:56,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:56,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:56,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:56,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 09:28:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:56,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:56,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:56,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:56,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:56,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:56,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:56,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:56,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:56,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:56,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:56,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:28:56,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-28 09:28:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:56,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:56,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:56,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:56,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:56,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:28:56,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:56,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:56,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:56,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:56,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:56,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:56,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-28 09:28:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:56,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:56,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:28:56,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:28:56,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:28:56,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:28:56,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:28:56,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:28:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:28:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:28:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:28:56,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:28:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 740 backedges. 8 proven. 676 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:28:56,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383326261] [2020-10-28 09:28:56,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:28:56,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:28:56,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126349790] [2020-10-28 09:28:56,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:28:56,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:28:56,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:28:56,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:28:56,903 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 30 states. [2020-10-28 09:28:57,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:28:57,889 INFO L93 Difference]: Finished difference Result 242 states and 267 transitions. [2020-10-28 09:28:57,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:28:57,890 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 99 [2020-10-28 09:28:57,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:28:57,892 INFO L225 Difference]: With dead ends: 242 [2020-10-28 09:28:57,892 INFO L226 Difference]: Without dead ends: 199 [2020-10-28 09:28:57,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:28:57,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-28 09:28:57,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 104. [2020-10-28 09:28:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-28 09:28:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-10-28 09:28:57,914 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2020-10-28 09:28:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:28:57,914 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-10-28 09:28:57,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:28:57,914 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-10-28 09:28:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 09:28:57,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:28:57,915 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:28:57,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:28:57,916 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:28:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:28:57,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1412856928, now seen corresponding path program 26 times [2020-10-28 09:28:57,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:28:57,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944184838] [2020-10-28 09:28:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:28:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:28:57,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:58,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:59,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:28:59,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:01,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:02,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:02,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:02,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:02,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 09:29:02,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:29:02,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:29:02,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:02,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:02,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:29:02,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:29:02,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:29:02,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:03,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:29:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:03,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:03,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:03,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:29:03,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:03,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:29:03,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:03,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:03,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:03,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:03,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:03,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:03,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 09:29:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:03,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:03,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:03,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:03,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:03,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:03,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:03,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:03,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:03,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:03,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:03,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:03,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 09:29:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:03,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:03,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:03,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:03,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:03,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:03,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:03,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:03,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:03,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:03,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:03,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:03,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-28 09:29:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:03,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:03,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:03,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:03,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:03,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:03,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:03,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:03,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:03,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:03,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:03,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:03,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-28 09:29:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:03,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:03,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:03,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:03,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:03,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:03,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:03,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:03,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:03,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:03,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:03,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 8 proven. 729 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:29:03,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944184838] [2020-10-28 09:29:03,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:29:03,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:29:03,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319003947] [2020-10-28 09:29:03,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:29:03,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:29:03,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:29:03,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:29:03,660 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 31 states. [2020-10-28 09:29:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:29:04,623 INFO L93 Difference]: Finished difference Result 248 states and 274 transitions. [2020-10-28 09:29:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:29:04,624 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 101 [2020-10-28 09:29:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:29:04,625 INFO L225 Difference]: With dead ends: 248 [2020-10-28 09:29:04,626 INFO L226 Difference]: Without dead ends: 205 [2020-10-28 09:29:04,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:29:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-28 09:29:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 106. [2020-10-28 09:29:04,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-28 09:29:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-10-28 09:29:04,656 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2020-10-28 09:29:04,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:29:04,656 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-10-28 09:29:04,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:29:04,656 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-10-28 09:29:04,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 09:29:04,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:29:04,658 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:29:04,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:29:04,658 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:29:04,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:29:04,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1218211134, now seen corresponding path program 27 times [2020-10-28 09:29:04,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:29:04,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338352089] [2020-10-28 09:29:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:29:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:04,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:05,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:05,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:07,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:09,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:09,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 09:29:09,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:29:09,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:29:09,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:09,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:09,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:29:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:29:09,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 09:29:09,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:10,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:29:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:10,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:10,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:10,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:29:10,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:10,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:29:10,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:10,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:10,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:10,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:10,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:10,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:10,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 09:29:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:10,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:10,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:10,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:10,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:10,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:10,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:10,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:10,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:10,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:10,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:10,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:10,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-28 09:29:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:10,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:10,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:10,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:10,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:10,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:10,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:10,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:10,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:10,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-28 09:29:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:10,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:10,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:10,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:10,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:10,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:10,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:10,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:10,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:10,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:10,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-28 09:29:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:10,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:10,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:10,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:10,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:10,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:10,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:10,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:10,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:10,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:10,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:10,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 8 proven. 784 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:29:10,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338352089] [2020-10-28 09:29:10,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:29:10,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:29:10,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919341089] [2020-10-28 09:29:10,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:29:10,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:29:10,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:29:10,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:29:10,442 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 32 states. [2020-10-28 09:29:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:29:11,401 INFO L93 Difference]: Finished difference Result 254 states and 281 transitions. [2020-10-28 09:29:11,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:29:11,402 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 103 [2020-10-28 09:29:11,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:29:11,404 INFO L225 Difference]: With dead ends: 254 [2020-10-28 09:29:11,404 INFO L226 Difference]: Without dead ends: 211 [2020-10-28 09:29:11,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:29:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-28 09:29:11,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 108. [2020-10-28 09:29:11,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 09:29:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-10-28 09:29:11,427 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2020-10-28 09:29:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:29:11,427 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-10-28 09:29:11,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:29:11,427 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-10-28 09:29:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 09:29:11,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:29:11,428 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:29:11,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:29:11,428 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:29:11,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:29:11,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1152803172, now seen corresponding path program 28 times [2020-10-28 09:29:11,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:29:11,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069692545] [2020-10-28 09:29:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:29:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:11,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:12,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:12,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:13,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:16,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:16,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 09:29:16,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:29:16,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:29:16,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:16,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:16,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:29:16,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:29:16,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 09:29:16,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:17,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:29:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:17,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:17,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:17,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:29:17,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:17,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:29:17,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:17,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:17,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:17,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:17,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:17,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:17,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 09:29:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:17,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:17,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:17,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:17,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:17,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:17,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:17,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:17,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:17,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:17,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:17,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:17,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-28 09:29:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:17,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:17,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:17,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:17,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:17,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:17,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:17,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:17,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:17,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:17,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:17,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:17,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 09:29:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:17,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:17,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:17,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:17,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:17,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:17,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:17,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:17,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:17,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:17,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:17,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:17,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-28 09:29:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:17,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:17,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:17,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:17,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:17,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:17,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:17,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:17,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:17,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 8 proven. 841 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:29:17,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069692545] [2020-10-28 09:29:17,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:29:17,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:29:17,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56469181] [2020-10-28 09:29:17,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:29:17,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:29:17,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:29:17,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:29:17,245 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 33 states. [2020-10-28 09:29:18,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:29:18,258 INFO L93 Difference]: Finished difference Result 260 states and 288 transitions. [2020-10-28 09:29:18,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:29:18,259 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 105 [2020-10-28 09:29:18,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:29:18,261 INFO L225 Difference]: With dead ends: 260 [2020-10-28 09:29:18,262 INFO L226 Difference]: Without dead ends: 217 [2020-10-28 09:29:18,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:29:18,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-28 09:29:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 110. [2020-10-28 09:29:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 09:29:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2020-10-28 09:29:18,282 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 105 [2020-10-28 09:29:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:29:18,282 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2020-10-28 09:29:18,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:29:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2020-10-28 09:29:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 09:29:18,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:29:18,284 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:29:18,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:29:18,284 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:29:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:29:18,284 INFO L82 PathProgramCache]: Analyzing trace with hash 930082938, now seen corresponding path program 29 times [2020-10-28 09:29:18,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:29:18,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744455349] [2020-10-28 09:29:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:29:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:18,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:18,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:19,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:20,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:23,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:23,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 09:29:23,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:29:23,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:29:23,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:23,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:23,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:29:23,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:29:23,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 09:29:23,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:24,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:29:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:24,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:24,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:24,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:29:24,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:24,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:29:24,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:24,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:24,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:24,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:24,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:24,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:24,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 09:29:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:24,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:24,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:24,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:24,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:24,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:24,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:24,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:24,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:24,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:24,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:24,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:24,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-28 09:29:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:24,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:24,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:24,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:24,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:24,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:24,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:24,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:24,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:24,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:24,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:24,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:24,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-28 09:29:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:24,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:24,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:24,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:24,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:24,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:24,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:24,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:24,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:24,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:24,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:24,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:24,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-28 09:29:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:24,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:24,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:24,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:24,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:24,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:24,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:24,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:24,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:24,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:24,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:24,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 8 proven. 900 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:29:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744455349] [2020-10-28 09:29:24,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:29:24,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:29:24,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355371008] [2020-10-28 09:29:24,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:29:24,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:29:24,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:29:24,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:29:24,151 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 34 states. [2020-10-28 09:29:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:29:25,431 INFO L93 Difference]: Finished difference Result 266 states and 295 transitions. [2020-10-28 09:29:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:29:25,431 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 107 [2020-10-28 09:29:25,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:29:25,433 INFO L225 Difference]: With dead ends: 266 [2020-10-28 09:29:25,433 INFO L226 Difference]: Without dead ends: 223 [2020-10-28 09:29:25,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:29:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-28 09:29:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 112. [2020-10-28 09:29:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-28 09:29:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-28 09:29:25,467 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2020-10-28 09:29:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:29:25,467 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-28 09:29:25,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:29:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-28 09:29:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 09:29:25,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:29:25,468 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:29:25,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:29:25,468 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:29:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:29:25,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1128874712, now seen corresponding path program 30 times [2020-10-28 09:29:25,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:29:25,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331525311] [2020-10-28 09:29:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:29:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:25,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:26,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:28,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:30,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:30,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 09:29:30,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:29:30,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 09:29:30,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:30,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:30,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:29:30,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:29:30,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 09:29:30,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:31,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:29:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:31,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:31,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:31,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:29:31,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:31,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:29:31,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:31,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:31,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:31,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:31,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:31,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:31,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 09:29:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:31,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:31,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:31,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:31,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:31,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:31,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:31,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:31,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:31,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:31,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:31,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:31,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-28 09:29:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:31,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:31,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:31,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:31,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:31,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:31,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:31,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:31,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:31,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-28 09:29:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:31,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:31,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:31,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:31,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:31,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:31,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:31,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:31,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:31,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:31,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:31,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:31,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-28 09:29:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:31,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:31,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:31,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:31,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:31,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:29:31,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:31,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:31,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:31,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:31,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:31,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 8 proven. 961 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:29:31,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331525311] [2020-10-28 09:29:31,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:29:31,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:29:31,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313400822] [2020-10-28 09:29:31,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:29:31,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:29:31,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:29:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:29:31,401 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 35 states. [2020-10-28 09:29:32,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:29:32,594 INFO L93 Difference]: Finished difference Result 272 states and 302 transitions. [2020-10-28 09:29:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:29:32,595 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 109 [2020-10-28 09:29:32,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:29:32,597 INFO L225 Difference]: With dead ends: 272 [2020-10-28 09:29:32,597 INFO L226 Difference]: Without dead ends: 229 [2020-10-28 09:29:32,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:29:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-28 09:29:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 114. [2020-10-28 09:29:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 09:29:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-10-28 09:29:32,625 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 109 [2020-10-28 09:29:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:29:32,625 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-10-28 09:29:32,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:29:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-10-28 09:29:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 09:29:32,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:29:32,626 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:29:32,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:29:32,627 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:29:32,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:29:32,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1105758794, now seen corresponding path program 31 times [2020-10-28 09:29:32,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:29:32,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380746736] [2020-10-28 09:29:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:29:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:32,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:37,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:37,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:37,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 09:29:37,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:29:37,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5202 [2020-10-28 09:29:37,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:37,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:37,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-28 09:29:37,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:29:37,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-28 09:29:37,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:42,417 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 13 [2020-10-28 09:29:44,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:29:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:44,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:44,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:44,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:29:44,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:44,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:29:44,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:44,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:44,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:44,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-28 09:29:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:44,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:44,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:44,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:44,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:44,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:29:44,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:44,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:44,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:44,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:44,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:44,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:44,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-28 09:29:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:44,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:44,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:44,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:44,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:44,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:29:44,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:44,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:44,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:44,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:44,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:44,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:44,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-28 09:29:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:44,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:44,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:44,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:44,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:44,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:29:44,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:44,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:44,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:44,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:44,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:44,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:44,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-28 09:29:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:44,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:44,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:44,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:44,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:44,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:29:44,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:44,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:44,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:29:44,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:44,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:29:44,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 710 proven. 354 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 09:29:44,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380746736] [2020-10-28 09:29:44,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:29:44,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 09:29:44,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926109108] [2020-10-28 09:29:44,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 09:29:44,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:29:44,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 09:29:44,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=1781, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 09:29:44,371 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 48 states. [2020-10-28 09:29:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:29:47,531 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2020-10-28 09:29:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-28 09:29:47,531 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 111 [2020-10-28 09:29:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:29:47,533 INFO L225 Difference]: With dead ends: 128 [2020-10-28 09:29:47,533 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 09:29:47,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1568, Invalid=5742, Unknown=0, NotChecked=0, Total=7310 [2020-10-28 09:29:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 09:29:47,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-28 09:29:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-28 09:29:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-10-28 09:29:47,568 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 111 [2020-10-28 09:29:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:29:47,569 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-10-28 09:29:47,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 09:29:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-10-28 09:29:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 09:29:47,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:29:47,570 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:29:47,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:29:47,570 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:29:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:29:47,571 INFO L82 PathProgramCache]: Analyzing trace with hash 960016144, now seen corresponding path program 32 times [2020-10-28 09:29:47,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:29:47,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976996226] [2020-10-28 09:29:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:29:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:47,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:47,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:50,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:50,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:52,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:52,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 09:29:52,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:29:52,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5097 [2020-10-28 09:29:52,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:52,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:52,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:29:52,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:29:52,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 09:29:52,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:53,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:29:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:53,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:53,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:53,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:29:53,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:53,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:29:53,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:53,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:53,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:53,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:29:53,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:53,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:53,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-28 09:29:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:53,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:53,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:53,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:53,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:53,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:53,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:53,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:53,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:53,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:53,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:53,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:53,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-28 09:29:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:53,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:53,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:53,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:53,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:53,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:53,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:53,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:53,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:53,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:53,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:53,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:53,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-28 09:29:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:53,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:53,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:53,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:53,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:53,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:53,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:53,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:53,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:53,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:53,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:53,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:53,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-28 09:29:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:53,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:53,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:53,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:53,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:53,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:53,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:53,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:53,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:53,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:53,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:53,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:53,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-10-28 09:29:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:53,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:53,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:29:53,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:29:53,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:29:53,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:29:53,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:29:53,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:29:53,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:29:53,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 09:29:53,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:29:53,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:29:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 10 proven. 1024 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-28 09:29:53,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976996226] [2020-10-28 09:29:53,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:29:53,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:29:53,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210786392] [2020-10-28 09:29:53,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:29:53,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:29:53,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:29:53,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:29:53,677 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 36 states. [2020-10-28 09:29:55,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:29:55,105 INFO L93 Difference]: Finished difference Result 290 states and 320 transitions. [2020-10-28 09:29:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:29:55,106 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 119 [2020-10-28 09:29:55,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:29:55,107 INFO L225 Difference]: With dead ends: 290 [2020-10-28 09:29:55,107 INFO L226 Difference]: Without dead ends: 239 [2020-10-28 09:29:55,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:29:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-28 09:29:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 124. [2020-10-28 09:29:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 09:29:55,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-10-28 09:29:55,144 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2020-10-28 09:29:55,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:29:55,145 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-10-28 09:29:55,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:29:55,145 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-10-28 09:29:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 09:29:55,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:29:55,146 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:29:55,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 09:29:55,146 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:29:55,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:29:55,147 INFO L82 PathProgramCache]: Analyzing trace with hash -742169490, now seen corresponding path program 33 times [2020-10-28 09:29:55,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:29:55,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823857344] [2020-10-28 09:29:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:29:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:29:55,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:29:55,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking...