/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:18:51,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:18:51,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:18:51,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:18:51,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:18:51,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:18:51,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:18:51,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:18:51,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:18:51,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:18:51,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:18:51,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:18:51,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:18:51,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:18:51,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:18:51,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:18:51,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:18:51,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:18:51,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:18:51,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:18:51,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:18:51,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:18:51,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:18:51,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:18:51,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:18:51,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:18:51,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:18:51,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:18:51,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:18:51,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:18:51,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:18:51,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:18:51,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:18:51,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:18:51,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:18:51,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:18:51,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:18:51,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:18:51,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:18:51,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:18:51,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:18:51,673 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 14:18:51,699 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:18:51,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:18:51,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:18:51,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:18:51,701 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:18:51,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:18:51,702 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:18:51,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:18:51,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:18:51,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:18:51,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:18:51,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:18:51,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:18:51,703 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:18:51,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:18:51,704 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:18:51,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:18:51,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:18:51,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:18:51,704 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:18:51,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:18:51,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:18:51,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:18:51,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:18:51,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:18:51,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:18:51,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:18:51,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:18:51,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:18:51,706 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:18:52,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:18:52,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:18:52,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:18:52,152 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:18:52,153 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:18:52,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2020-10-27 14:18:52,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f30dcc659/e9b14b29aa4d419ca3a2a843743cacf3/FLAG2c987dda9 [2020-10-27 14:18:52,841 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:18:52,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2020-10-27 14:18:52,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f30dcc659/e9b14b29aa4d419ca3a2a843743cacf3/FLAG2c987dda9 [2020-10-27 14:18:53,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f30dcc659/e9b14b29aa4d419ca3a2a843743cacf3 [2020-10-27 14:18:53,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:18:53,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:18:53,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:18:53,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:18:53,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:18:53,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:18:53" (1/1) ... [2020-10-27 14:18:53,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c25aa6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:53, skipping insertion in model container [2020-10-27 14:18:53,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:18:53" (1/1) ... [2020-10-27 14:18:53,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:18:53,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:18:53,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:18:53,403 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:18:53,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:18:53,455 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:18:53,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:53 WrapperNode [2020-10-27 14:18:53,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:18:53,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:18:53,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:18:53,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:18:53,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:53" (1/1) ... [2020-10-27 14:18:53,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:53" (1/1) ... [2020-10-27 14:18:53,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:53" (1/1) ... [2020-10-27 14:18:53,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:53" (1/1) ... [2020-10-27 14:18:53,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:53" (1/1) ... [2020-10-27 14:18:53,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:53" (1/1) ... [2020-10-27 14:18:53,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:53" (1/1) ... [2020-10-27 14:18:53,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:18:53,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:18:53,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:18:53,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:18:53,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:18:53,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:18:53,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:18:53,592 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:18:53,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:18:53,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:18:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:18:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:18:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:18:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:18:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:18:53,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:18:53,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:18:53,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:18:53,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:18:53,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:18:53,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:18:53,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:18:53,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:18:53,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:18:53,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:18:54,199 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:18:54,199 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-27 14:18:54,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:18:54 BoogieIcfgContainer [2020-10-27 14:18:54,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:18:54,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:18:54,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:18:54,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:18:54,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:18:53" (1/3) ... [2020-10-27 14:18:54,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6191f83d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:18:54, skipping insertion in model container [2020-10-27 14:18:54,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:53" (2/3) ... [2020-10-27 14:18:54,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6191f83d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:18:54, skipping insertion in model container [2020-10-27 14:18:54,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:18:54" (3/3) ... [2020-10-27 14:18:54,219 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2020-10-27 14:18:54,233 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:18:54,238 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:18:54,256 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:18:54,296 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:18:54,296 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:18:54,296 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:18:54,296 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:18:54,296 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:18:54,297 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:18:54,297 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:18:54,297 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:18:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-27 14:18:54,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:18:54,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:54,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:54,337 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:54,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1163458024, now seen corresponding path program 1 times [2020-10-27 14:18:54,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:54,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397023568] [2020-10-27 14:18:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:54,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:54,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:54,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:54,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:54,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:54,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:54,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:56,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:56,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:18:56,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:18:56,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1575 [2020-10-27 14:18:56,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:56,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:56,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:18:56,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:18:56,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:18:56,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:56,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:56,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:56,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:56,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:56,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 14:18:56,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:56,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:56,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:56,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:56,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:18:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:56,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397023568] [2020-10-27 14:18:56,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:18:56,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:18:56,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045708067] [2020-10-27 14:18:56,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:18:56,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:56,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:18:56,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:18:56,369 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 4 states. [2020-10-27 14:18:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:56,578 INFO L93 Difference]: Finished difference Result 95 states and 141 transitions. [2020-10-27 14:18:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:18:56,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 14:18:56,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:56,589 INFO L225 Difference]: With dead ends: 95 [2020-10-27 14:18:56,589 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 14:18:56,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:18:56,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 14:18:56,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-10-27 14:18:56,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 14:18:56,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-27 14:18:56,637 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 27 [2020-10-27 14:18:56,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:56,638 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-27 14:18:56,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:18:56,638 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-27 14:18:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:18:56,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:56,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:56,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:18:56,641 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:56,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:56,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1296943878, now seen corresponding path program 1 times [2020-10-27 14:18:56,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:56,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706023530] [2020-10-27 14:18:56,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:56,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:56,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:56,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:56,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:56,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:56,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:57,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:01,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:01,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:19:01,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:19:01,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:19:01,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:01,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:19:01,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:19:01,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:19:01,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:19:01,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:01,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:01,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:01,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:01,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:01,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:01,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:01,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:01,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:01,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:01,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:19:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 14:19:01,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706023530] [2020-10-27 14:19:01,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:01,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:19:01,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432594069] [2020-10-27 14:19:01,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:19:01,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:01,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:19:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:19:01,789 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 5 states. [2020-10-27 14:19:02,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:02,117 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2020-10-27 14:19:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:19:02,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-10-27 14:19:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:02,120 INFO L225 Difference]: With dead ends: 96 [2020-10-27 14:19:02,122 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 14:19:02,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:19:02,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 14:19:02,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-10-27 14:19:02,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:19:02,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-10-27 14:19:02,147 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 39 [2020-10-27 14:19:02,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:02,148 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-10-27 14:19:02,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:19:02,148 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-10-27 14:19:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:19:02,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:02,155 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:02,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:19:02,157 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:02,159 INFO L82 PathProgramCache]: Analyzing trace with hash -655793810, now seen corresponding path program 2 times [2020-10-27 14:19:02,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:02,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078127297] [2020-10-27 14:19:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:02,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:02,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:02,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:02,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:02,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:02,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:06,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:07,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:07,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:19:07,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:19:07,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:19:07,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:07,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:19:07,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:19:07,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:19:07,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:07,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:07,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:07,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:07,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:07,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:07,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:07,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:07,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:07,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:07,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:07,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-27 14:19:07,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078127297] [2020-10-27 14:19:07,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:07,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:19:07,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40586753] [2020-10-27 14:19:07,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:19:07,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:07,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:19:07,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:19:07,311 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 6 states. [2020-10-27 14:19:07,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:07,614 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2020-10-27 14:19:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:19:07,615 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-10-27 14:19:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:07,618 INFO L225 Difference]: With dead ends: 118 [2020-10-27 14:19:07,618 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 14:19:07,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:19:07,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 14:19:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-10-27 14:19:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:19:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2020-10-27 14:19:07,646 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 51 [2020-10-27 14:19:07,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:07,649 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2020-10-27 14:19:07,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:19:07,649 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2020-10-27 14:19:07,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:19:07,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:07,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:07,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:19:07,652 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:07,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1473138658, now seen corresponding path program 3 times [2020-10-27 14:19:07,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:07,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439075919] [2020-10-27 14:19:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:07,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:07,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:07,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:07,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:07,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:08,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:12,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:12,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:19:12,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:12,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:19:12,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:12,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:19:12,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:19:12,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:19:12,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:19:12,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:12,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:12,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:12,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:12,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:12,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:19:12,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:12,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:12,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:12,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:12,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 14:19:12,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439075919] [2020-10-27 14:19:12,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:12,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:19:12,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309199293] [2020-10-27 14:19:12,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:19:12,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:12,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:19:12,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:19:12,856 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 7 states. [2020-10-27 14:19:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:13,119 INFO L93 Difference]: Finished difference Result 140 states and 158 transitions. [2020-10-27 14:19:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:19:13,120 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-10-27 14:19:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:13,121 INFO L225 Difference]: With dead ends: 140 [2020-10-27 14:19:13,121 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 14:19:13,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:19:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 14:19:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2020-10-27 14:19:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 14:19:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2020-10-27 14:19:13,133 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 63 [2020-10-27 14:19:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:13,134 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2020-10-27 14:19:13,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:19:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2020-10-27 14:19:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:19:13,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:13,136 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:13,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:19:13,136 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:13,137 INFO L82 PathProgramCache]: Analyzing trace with hash 653394006, now seen corresponding path program 4 times [2020-10-27 14:19:13,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:13,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580158268] [2020-10-27 14:19:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:13,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:14,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:18,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:18,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:19:18,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:18,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 14:19:18,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:18,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:19:18,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:19:18,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:19:18,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:19:18,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:18,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:18,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:18,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:18,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:18,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:18,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:18,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:18,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:18,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:18,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-27 14:19:18,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580158268] [2020-10-27 14:19:18,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:18,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:19:18,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330172329] [2020-10-27 14:19:18,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:19:18,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:18,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:19:18,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:19:18,333 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 8 states. [2020-10-27 14:19:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:18,617 INFO L93 Difference]: Finished difference Result 162 states and 180 transitions. [2020-10-27 14:19:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:19:18,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-27 14:19:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:18,619 INFO L225 Difference]: With dead ends: 162 [2020-10-27 14:19:18,619 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 14:19:18,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:19:18,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 14:19:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2020-10-27 14:19:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:19:18,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2020-10-27 14:19:18,631 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 75 [2020-10-27 14:19:18,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:18,631 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2020-10-27 14:19:18,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:19:18,632 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2020-10-27 14:19:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:19:18,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:18,633 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:18,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:19:18,634 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:18,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:18,634 INFO L82 PathProgramCache]: Analyzing trace with hash 157643466, now seen corresponding path program 5 times [2020-10-27 14:19:18,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:18,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261989605] [2020-10-27 14:19:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:18,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:18,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:18,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:18,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:18,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:23,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:23,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:19:23,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:23,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 14:19:23,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:23,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:19:23,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:19:23,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:19:23,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:23,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:23,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:23,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:23,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:23,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:23,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:23,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:23,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:23,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:23,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-27 14:19:23,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261989605] [2020-10-27 14:19:23,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:23,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:19:23,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156866417] [2020-10-27 14:19:23,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:19:23,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:23,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:19:23,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:19:23,849 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 9 states. [2020-10-27 14:19:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:24,197 INFO L93 Difference]: Finished difference Result 184 states and 202 transitions. [2020-10-27 14:19:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:19:24,198 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 87 [2020-10-27 14:19:24,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:24,199 INFO L225 Difference]: With dead ends: 184 [2020-10-27 14:19:24,200 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:19:24,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:19:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:19:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2020-10-27 14:19:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 14:19:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2020-10-27 14:19:24,223 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 87 [2020-10-27 14:19:24,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:24,227 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2020-10-27 14:19:24,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:19:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2020-10-27 14:19:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:19:24,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:24,229 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:24,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:19:24,233 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:24,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1917212866, now seen corresponding path program 6 times [2020-10-27 14:19:24,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:24,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121246649] [2020-10-27 14:19:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:24,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:29,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:29,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 14:19:29,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:29,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 14:19:29,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:29,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:19:29,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 14:19:29,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:19:29,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:29,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:29,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:29,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:29,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:29,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:29,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:29,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:29,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:29,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-27 14:19:29,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121246649] [2020-10-27 14:19:29,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:29,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:19:29,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53476430] [2020-10-27 14:19:29,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:19:29,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:29,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:19:29,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:19:29,407 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand 10 states. [2020-10-27 14:19:29,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:29,754 INFO L93 Difference]: Finished difference Result 206 states and 224 transitions. [2020-10-27 14:19:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:19:29,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 99 [2020-10-27 14:19:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:29,755 INFO L225 Difference]: With dead ends: 206 [2020-10-27 14:19:29,756 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 14:19:29,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:19:29,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 14:19:29,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2020-10-27 14:19:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 14:19:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2020-10-27 14:19:29,767 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 99 [2020-10-27 14:19:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:29,767 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2020-10-27 14:19:29,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:19:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2020-10-27 14:19:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 14:19:29,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:29,769 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:29,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:19:29,770 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:29,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:29,770 INFO L82 PathProgramCache]: Analyzing trace with hash 234855858, now seen corresponding path program 7 times [2020-10-27 14:19:29,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:29,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218763056] [2020-10-27 14:19:29,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:29,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:29,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:29,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:29,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:29,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:34,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:34,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 14:19:34,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:34,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-27 14:19:34,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:19:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:19:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:19:34,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:34,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:35,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:35,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:35,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:35,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:35,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:19:35,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:35,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:35,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:35,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:35,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-10-27 14:19:35,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218763056] [2020-10-27 14:19:35,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:35,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:19:35,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63993480] [2020-10-27 14:19:35,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:19:35,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:35,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:19:35,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:35,039 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 11 states. [2020-10-27 14:19:35,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:35,407 INFO L93 Difference]: Finished difference Result 228 states and 246 transitions. [2020-10-27 14:19:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:19:35,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 111 [2020-10-27 14:19:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:35,409 INFO L225 Difference]: With dead ends: 228 [2020-10-27 14:19:35,409 INFO L226 Difference]: Without dead ends: 135 [2020-10-27 14:19:35,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:35,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-27 14:19:35,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2020-10-27 14:19:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 14:19:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 136 transitions. [2020-10-27 14:19:35,420 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 136 transitions. Word has length 111 [2020-10-27 14:19:35,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:35,420 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 136 transitions. [2020-10-27 14:19:35,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:19:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 136 transitions. [2020-10-27 14:19:35,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 14:19:35,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:35,422 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:35,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:19:35,422 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:35,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:35,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1345825242, now seen corresponding path program 8 times [2020-10-27 14:19:35,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:35,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909183708] [2020-10-27 14:19:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:35,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:35,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:35,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:35,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:35,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:40,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:40,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 14:19:40,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:40,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 14:19:40,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:40,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:19:40,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 14:19:40,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:19:40,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:40,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:40,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:40,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:40,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:40,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:40,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:40,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:40,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:40,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:40,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:40,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2020-10-27 14:19:40,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909183708] [2020-10-27 14:19:40,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:40,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:19:40,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254558176] [2020-10-27 14:19:40,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:19:40,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:40,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:19:40,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:19:40,648 INFO L87 Difference]: Start difference. First operand 129 states and 136 transitions. Second operand 12 states. [2020-10-27 14:19:41,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:41,200 INFO L93 Difference]: Finished difference Result 250 states and 268 transitions. [2020-10-27 14:19:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:19:41,201 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 123 [2020-10-27 14:19:41,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:41,203 INFO L225 Difference]: With dead ends: 250 [2020-10-27 14:19:41,204 INFO L226 Difference]: Without dead ends: 147 [2020-10-27 14:19:41,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:19:41,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-27 14:19:41,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 141. [2020-10-27 14:19:41,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 14:19:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 148 transitions. [2020-10-27 14:19:41,232 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 148 transitions. Word has length 123 [2020-10-27 14:19:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:41,234 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 148 transitions. [2020-10-27 14:19:41,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:19:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 148 transitions. [2020-10-27 14:19:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 14:19:41,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:41,238 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:41,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:19:41,243 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:41,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:41,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1680134298, now seen corresponding path program 9 times [2020-10-27 14:19:41,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:41,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113685761] [2020-10-27 14:19:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:41,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:41,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:41,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:41,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:41,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:46,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:46,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 14:19:46,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:46,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 14:19:46,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:46,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:19:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 14:19:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:19:46,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:46,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:46,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:46,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:46,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:46,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:46,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:46,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:46,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:46,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2020-10-27 14:19:46,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113685761] [2020-10-27 14:19:46,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:46,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:19:46,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438907553] [2020-10-27 14:19:46,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:19:46,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:46,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:19:46,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:19:46,472 INFO L87 Difference]: Start difference. First operand 141 states and 148 transitions. Second operand 13 states. [2020-10-27 14:19:46,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:46,947 INFO L93 Difference]: Finished difference Result 272 states and 290 transitions. [2020-10-27 14:19:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:19:46,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2020-10-27 14:19:46,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:46,951 INFO L225 Difference]: With dead ends: 272 [2020-10-27 14:19:46,951 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 14:19:46,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:19:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 14:19:46,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 153. [2020-10-27 14:19:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 14:19:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 160 transitions. [2020-10-27 14:19:46,965 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 160 transitions. Word has length 135 [2020-10-27 14:19:46,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:46,966 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 160 transitions. [2020-10-27 14:19:46,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:19:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 160 transitions. [2020-10-27 14:19:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-27 14:19:46,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:46,969 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:46,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:19:46,969 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:46,970 INFO L82 PathProgramCache]: Analyzing trace with hash -408548082, now seen corresponding path program 10 times [2020-10-27 14:19:46,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:46,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641404461] [2020-10-27 14:19:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:46,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:47,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:47,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:47,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:47,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:52,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:52,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 14:19:52,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:52,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 14:19:52,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:52,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:19:52,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 14:19:52,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:19:52,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:52,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:52,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:52,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:52,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:52,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:52,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:52,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:52,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:52,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2020-10-27 14:19:52,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641404461] [2020-10-27 14:19:52,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:52,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:19:52,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625958986] [2020-10-27 14:19:52,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:19:52,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:52,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:19:52,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:19:52,224 INFO L87 Difference]: Start difference. First operand 153 states and 160 transitions. Second operand 14 states. [2020-10-27 14:19:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:52,752 INFO L93 Difference]: Finished difference Result 294 states and 312 transitions. [2020-10-27 14:19:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:19:52,753 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 147 [2020-10-27 14:19:52,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:52,755 INFO L225 Difference]: With dead ends: 294 [2020-10-27 14:19:52,755 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 14:19:52,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:19:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 14:19:52,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2020-10-27 14:19:52,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 14:19:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 172 transitions. [2020-10-27 14:19:52,764 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 172 transitions. Word has length 147 [2020-10-27 14:19:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:52,765 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 172 transitions. [2020-10-27 14:19:52,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:19:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 172 transitions. [2020-10-27 14:19:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 14:19:52,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:52,767 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:52,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:19:52,767 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:52,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:52,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1034089598, now seen corresponding path program 11 times [2020-10-27 14:19:52,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:52,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528198871] [2020-10-27 14:19:52,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:52,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:52,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:52,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:52,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:52,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:57,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:57,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 14:19:57,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:19:57,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 14:19:57,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:57,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:19:57,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 14:19:57,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:19:57,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:58,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:58,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:58,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:58,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:58,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:58,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:58,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:58,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:58,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:58,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:58,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2020-10-27 14:19:58,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528198871] [2020-10-27 14:19:58,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:58,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:19:58,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752630762] [2020-10-27 14:19:58,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:19:58,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:19:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:19:58,046 INFO L87 Difference]: Start difference. First operand 165 states and 172 transitions. Second operand 15 states. [2020-10-27 14:19:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:58,565 INFO L93 Difference]: Finished difference Result 316 states and 334 transitions. [2020-10-27 14:19:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:19:58,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 159 [2020-10-27 14:19:58,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:58,568 INFO L225 Difference]: With dead ends: 316 [2020-10-27 14:19:58,568 INFO L226 Difference]: Without dead ends: 183 [2020-10-27 14:19:58,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:19:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-27 14:19:58,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2020-10-27 14:19:58,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-27 14:19:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 184 transitions. [2020-10-27 14:19:58,577 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 184 transitions. Word has length 159 [2020-10-27 14:19:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:58,578 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 184 transitions. [2020-10-27 14:19:58,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:19:58,578 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 184 transitions. [2020-10-27 14:19:58,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 14:19:58,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:58,580 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:58,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:19:58,580 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:58,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1205521398, now seen corresponding path program 12 times [2020-10-27 14:19:58,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:58,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171045874] [2020-10-27 14:19:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:58,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:58,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:58,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:58,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:58,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:03,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:03,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-27 14:20:03,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:03,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:20:03,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:03,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:20:03,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 14:20:03,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:20:03,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:03,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:03,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:03,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:03,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:03,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:03,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:03,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:03,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:03,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:03,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:03,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2020-10-27 14:20:03,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171045874] [2020-10-27 14:20:03,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:03,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:20:03,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387929483] [2020-10-27 14:20:03,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:20:03,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:03,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:20:03,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:20:03,872 INFO L87 Difference]: Start difference. First operand 177 states and 184 transitions. Second operand 16 states. [2020-10-27 14:20:04,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:04,514 INFO L93 Difference]: Finished difference Result 338 states and 356 transitions. [2020-10-27 14:20:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:20:04,516 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 171 [2020-10-27 14:20:04,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:04,518 INFO L225 Difference]: With dead ends: 338 [2020-10-27 14:20:04,518 INFO L226 Difference]: Without dead ends: 195 [2020-10-27 14:20:04,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:20:04,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-27 14:20:04,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 189. [2020-10-27 14:20:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-27 14:20:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 196 transitions. [2020-10-27 14:20:04,528 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 196 transitions. Word has length 171 [2020-10-27 14:20:04,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:04,529 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 196 transitions. [2020-10-27 14:20:04,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:20:04,529 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 196 transitions. [2020-10-27 14:20:04,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-27 14:20:04,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:04,537 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:04,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:20:04,537 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:04,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1758441878, now seen corresponding path program 13 times [2020-10-27 14:20:04,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:04,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249130046] [2020-10-27 14:20:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:04,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:04,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:04,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:04,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:04,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:09,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:09,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 14:20:09,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:09,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-27 14:20:09,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:09,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:20:09,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 14:20:09,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:20:09,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:09,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:09,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:09,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:09,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:09,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:09,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:09,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:09,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:09,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:09,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:09,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked. [2020-10-27 14:20:09,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249130046] [2020-10-27 14:20:09,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:09,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:20:09,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862497440] [2020-10-27 14:20:09,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:20:09,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:09,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:20:09,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:20:09,908 INFO L87 Difference]: Start difference. First operand 189 states and 196 transitions. Second operand 17 states. [2020-10-27 14:20:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:10,567 INFO L93 Difference]: Finished difference Result 360 states and 378 transitions. [2020-10-27 14:20:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:20:10,567 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 183 [2020-10-27 14:20:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:10,569 INFO L225 Difference]: With dead ends: 360 [2020-10-27 14:20:10,569 INFO L226 Difference]: Without dead ends: 207 [2020-10-27 14:20:10,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:20:10,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-27 14:20:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 201. [2020-10-27 14:20:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-27 14:20:10,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 208 transitions. [2020-10-27 14:20:10,581 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 208 transitions. Word has length 183 [2020-10-27 14:20:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:10,583 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 208 transitions. [2020-10-27 14:20:10,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:20:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 208 transitions. [2020-10-27 14:20:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-27 14:20:10,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:10,586 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:10,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:20:10,586 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:10,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:10,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1695640866, now seen corresponding path program 14 times [2020-10-27 14:20:10,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:10,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309399692] [2020-10-27 14:20:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:10,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:10,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:10,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:10,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:10,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:15,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:15,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-27 14:20:15,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:15,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5145 [2020-10-27 14:20:15,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:15,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:20:15,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-27 14:20:15,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:20:15,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:16,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:16,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:16,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:16,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:16,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:16,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:16,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:16,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:16,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:16,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:16,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 980 trivial. 0 not checked. [2020-10-27 14:20:16,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309399692] [2020-10-27 14:20:16,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:16,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:20:16,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643114999] [2020-10-27 14:20:16,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:20:16,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:16,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:20:16,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:20:16,044 INFO L87 Difference]: Start difference. First operand 201 states and 208 transitions. Second operand 18 states. [2020-10-27 14:20:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:16,724 INFO L93 Difference]: Finished difference Result 382 states and 400 transitions. [2020-10-27 14:20:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:20:16,725 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 195 [2020-10-27 14:20:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:16,728 INFO L225 Difference]: With dead ends: 382 [2020-10-27 14:20:16,729 INFO L226 Difference]: Without dead ends: 219 [2020-10-27 14:20:16,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:20:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-27 14:20:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2020-10-27 14:20:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-27 14:20:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 220 transitions. [2020-10-27 14:20:16,748 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 220 transitions. Word has length 195 [2020-10-27 14:20:16,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:16,748 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 220 transitions. [2020-10-27 14:20:16,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:20:16,749 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 220 transitions. [2020-10-27 14:20:16,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-27 14:20:16,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:16,754 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:16,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:20:16,754 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:16,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:16,756 INFO L82 PathProgramCache]: Analyzing trace with hash 153524562, now seen corresponding path program 15 times [2020-10-27 14:20:16,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:16,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530577231] [2020-10-27 14:20:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:16,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:16,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:16,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:16,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:16,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:21,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:21,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-27 14:20:21,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:21,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-27 14:20:21,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:21,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:20:21,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-27 14:20:21,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:20:21,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:22,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:22,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:22,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:22,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:22,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:22,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:22,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:22,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:22,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:22,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:22,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2020-10-27 14:20:22,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530577231] [2020-10-27 14:20:22,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:22,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:20:22,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860890758] [2020-10-27 14:20:22,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:20:22,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:22,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:20:22,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:20:22,178 INFO L87 Difference]: Start difference. First operand 213 states and 220 transitions. Second operand 19 states. [2020-10-27 14:20:22,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:22,937 INFO L93 Difference]: Finished difference Result 404 states and 422 transitions. [2020-10-27 14:20:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:20:22,938 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 207 [2020-10-27 14:20:22,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:22,940 INFO L225 Difference]: With dead ends: 404 [2020-10-27 14:20:22,940 INFO L226 Difference]: Without dead ends: 231 [2020-10-27 14:20:22,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:20:22,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-27 14:20:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2020-10-27 14:20:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-27 14:20:22,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 232 transitions. [2020-10-27 14:20:22,956 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 232 transitions. Word has length 207 [2020-10-27 14:20:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:22,957 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 232 transitions. [2020-10-27 14:20:22,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:20:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 232 transitions. [2020-10-27 14:20:22,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-27 14:20:22,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:22,960 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:22,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:20:22,960 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:22,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:22,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1667850694, now seen corresponding path program 16 times [2020-10-27 14:20:22,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:22,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105598099] [2020-10-27 14:20:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:22,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:28,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:28,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-27 14:20:28,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:28,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5214 [2020-10-27 14:20:28,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:20:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 115 [2020-10-27 14:20:28,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:20:28,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:28,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:28,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:28,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:28,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:28,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:28,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:20:28,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:28,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:28,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:28,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:28,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1536 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1280 trivial. 0 not checked. [2020-10-27 14:20:28,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105598099] [2020-10-27 14:20:28,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:28,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:20:28,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441965245] [2020-10-27 14:20:28,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:20:28,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:28,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:20:28,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:20:28,555 INFO L87 Difference]: Start difference. First operand 225 states and 232 transitions. Second operand 20 states. [2020-10-27 14:20:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:29,361 INFO L93 Difference]: Finished difference Result 426 states and 444 transitions. [2020-10-27 14:20:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:20:29,366 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 219 [2020-10-27 14:20:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:29,368 INFO L225 Difference]: With dead ends: 426 [2020-10-27 14:20:29,368 INFO L226 Difference]: Without dead ends: 243 [2020-10-27 14:20:29,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:20:29,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-27 14:20:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 237. [2020-10-27 14:20:29,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-27 14:20:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 244 transitions. [2020-10-27 14:20:29,379 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 244 transitions. Word has length 219 [2020-10-27 14:20:29,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:29,380 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 244 transitions. [2020-10-27 14:20:29,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:20:29,380 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 244 transitions. [2020-10-27 14:20:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-27 14:20:29,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:29,383 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:29,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:20:29,383 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:29,384 INFO L82 PathProgramCache]: Analyzing trace with hash -154670022, now seen corresponding path program 17 times [2020-10-27 14:20:29,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:29,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953033827] [2020-10-27 14:20:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:29,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:34,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:34,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-27 14:20:34,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:34,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-27 14:20:34,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:34,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:20:34,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-27 14:20:34,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:20:34,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:34,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:34,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:34,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:34,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:34,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:34,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:20:34,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:34,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:34,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:34,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:34,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1734 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1445 trivial. 0 not checked. [2020-10-27 14:20:34,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953033827] [2020-10-27 14:20:34,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:34,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:20:34,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178377027] [2020-10-27 14:20:34,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:20:34,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:34,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:20:34,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:20:34,901 INFO L87 Difference]: Start difference. First operand 237 states and 244 transitions. Second operand 21 states. [2020-10-27 14:20:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:35,732 INFO L93 Difference]: Finished difference Result 448 states and 466 transitions. [2020-10-27 14:20:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:20:35,733 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 231 [2020-10-27 14:20:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:35,735 INFO L225 Difference]: With dead ends: 448 [2020-10-27 14:20:35,735 INFO L226 Difference]: Without dead ends: 255 [2020-10-27 14:20:35,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:20:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-27 14:20:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 249. [2020-10-27 14:20:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-27 14:20:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 256 transitions. [2020-10-27 14:20:35,750 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 256 transitions. Word has length 231 [2020-10-27 14:20:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:35,751 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 256 transitions. [2020-10-27 14:20:35,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:20:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 256 transitions. [2020-10-27 14:20:35,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-27 14:20:35,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:35,753 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:35,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:20:35,753 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:35,754 INFO L82 PathProgramCache]: Analyzing trace with hash -606914386, now seen corresponding path program 18 times [2020-10-27 14:20:35,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:35,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473166340] [2020-10-27 14:20:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:35,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:36,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:40,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:40,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-27 14:20:40,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:40,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5138 [2020-10-27 14:20:40,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:40,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:20:40,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-27 14:20:40,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:20:40,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:41,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:41,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:41,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:41,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:41,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:41,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:41,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:41,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:41,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:41,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:41,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1944 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1620 trivial. 0 not checked. [2020-10-27 14:20:41,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473166340] [2020-10-27 14:20:41,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:41,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:20:41,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786471901] [2020-10-27 14:20:41,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:20:41,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:41,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:20:41,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:20:41,345 INFO L87 Difference]: Start difference. First operand 249 states and 256 transitions. Second operand 22 states. [2020-10-27 14:20:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:42,184 INFO L93 Difference]: Finished difference Result 470 states and 488 transitions. [2020-10-27 14:20:42,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:20:42,184 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 243 [2020-10-27 14:20:42,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:42,188 INFO L225 Difference]: With dead ends: 470 [2020-10-27 14:20:42,188 INFO L226 Difference]: Without dead ends: 267 [2020-10-27 14:20:42,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:20:42,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-27 14:20:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 261. [2020-10-27 14:20:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-27 14:20:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 268 transitions. [2020-10-27 14:20:42,202 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 268 transitions. Word has length 243 [2020-10-27 14:20:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:42,202 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 268 transitions. [2020-10-27 14:20:42,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:20:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 268 transitions. [2020-10-27 14:20:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-27 14:20:42,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:42,204 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:42,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:20:42,204 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:42,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:42,205 INFO L82 PathProgramCache]: Analyzing trace with hash -157530334, now seen corresponding path program 19 times [2020-10-27 14:20:42,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:42,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018800729] [2020-10-27 14:20:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:42,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:42,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:42,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:42,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:42,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:47,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:47,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-27 14:20:47,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:47,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5621 [2020-10-27 14:20:47,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:47,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:20:47,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-27 14:20:47,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:20:47,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:48,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:48,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:48,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:48,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:48,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:48,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:48,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:48,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:48,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:48,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:48,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2166 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2020-10-27 14:20:48,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018800729] [2020-10-27 14:20:48,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:48,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:20:48,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837448911] [2020-10-27 14:20:48,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:20:48,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:48,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:20:48,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:20:48,284 INFO L87 Difference]: Start difference. First operand 261 states and 268 transitions. Second operand 23 states. [2020-10-27 14:20:49,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:49,193 INFO L93 Difference]: Finished difference Result 492 states and 510 transitions. [2020-10-27 14:20:49,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:20:49,193 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 255 [2020-10-27 14:20:49,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:49,196 INFO L225 Difference]: With dead ends: 492 [2020-10-27 14:20:49,196 INFO L226 Difference]: Without dead ends: 279 [2020-10-27 14:20:49,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:20:49,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-27 14:20:49,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 273. [2020-10-27 14:20:49,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-27 14:20:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 280 transitions. [2020-10-27 14:20:49,208 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 280 transitions. Word has length 255 [2020-10-27 14:20:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:49,208 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 280 transitions. [2020-10-27 14:20:49,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:20:49,208 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 280 transitions. [2020-10-27 14:20:49,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-27 14:20:49,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:49,210 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:49,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:20:49,211 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:49,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:49,211 INFO L82 PathProgramCache]: Analyzing trace with hash -155969642, now seen corresponding path program 20 times [2020-10-27 14:20:49,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:49,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629121520] [2020-10-27 14:20:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:49,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:49,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:49,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:49,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:49,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:54,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:54,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-27 14:20:54,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:54,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5221 [2020-10-27 14:20:54,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:54,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:20:54,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-27 14:20:54,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:20:54,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:54,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:54,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:54,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:54,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:54,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:54,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:54,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:54,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:54,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:54,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:54,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2000 trivial. 0 not checked. [2020-10-27 14:20:54,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629121520] [2020-10-27 14:20:54,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:54,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:20:54,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693149393] [2020-10-27 14:20:54,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:20:54,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:54,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:20:54,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:20:54,949 INFO L87 Difference]: Start difference. First operand 273 states and 280 transitions. Second operand 24 states. [2020-10-27 14:20:55,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:55,770 INFO L93 Difference]: Finished difference Result 514 states and 532 transitions. [2020-10-27 14:20:55,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:20:55,771 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 267 [2020-10-27 14:20:55,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:55,773 INFO L225 Difference]: With dead ends: 514 [2020-10-27 14:20:55,773 INFO L226 Difference]: Without dead ends: 291 [2020-10-27 14:20:55,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:20:55,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-27 14:20:55,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 285. [2020-10-27 14:20:55,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-27 14:20:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 292 transitions. [2020-10-27 14:20:55,785 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 292 transitions. Word has length 267 [2020-10-27 14:20:55,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:55,786 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 292 transitions. [2020-10-27 14:20:55,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:20:55,786 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 292 transitions. [2020-10-27 14:20:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-27 14:20:55,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:55,788 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:55,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:20:55,788 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:55,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1462479370, now seen corresponding path program 21 times [2020-10-27 14:20:55,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:55,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861430532] [2020-10-27 14:20:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:55,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:55,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:55,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:55,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:56,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:00,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:00,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-27 14:21:00,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:00,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-27 14:21:00,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:21:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-27 14:21:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:21:00,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:01,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:01,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:01,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:01,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:01,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:01,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:01,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:01,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:01,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:01,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:01,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2020-10-27 14:21:01,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861430532] [2020-10-27 14:21:01,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:01,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:21:01,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240666143] [2020-10-27 14:21:01,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:21:01,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:01,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:21:01,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:21:01,592 INFO L87 Difference]: Start difference. First operand 285 states and 292 transitions. Second operand 25 states. [2020-10-27 14:21:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:02,491 INFO L93 Difference]: Finished difference Result 536 states and 554 transitions. [2020-10-27 14:21:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:21:02,492 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 279 [2020-10-27 14:21:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:02,493 INFO L225 Difference]: With dead ends: 536 [2020-10-27 14:21:02,494 INFO L226 Difference]: Without dead ends: 303 [2020-10-27 14:21:02,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:21:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-27 14:21:02,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 297. [2020-10-27 14:21:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-27 14:21:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 304 transitions. [2020-10-27 14:21:02,506 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 304 transitions. Word has length 279 [2020-10-27 14:21:02,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:02,506 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 304 transitions. [2020-10-27 14:21:02,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:21:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 304 transitions. [2020-10-27 14:21:02,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-27 14:21:02,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:02,508 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:02,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:21:02,509 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:02,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:02,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1586757246, now seen corresponding path program 22 times [2020-10-27 14:21:02,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:02,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048374118] [2020-10-27 14:21:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:02,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:02,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:02,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:02,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:02,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:07,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:07,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-27 14:21:07,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:07,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5186 [2020-10-27 14:21:07,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:07,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:21:07,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-27 14:21:07,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:21:07,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:08,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:08,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:08,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:08,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:08,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:08,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:08,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:08,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:08,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:08,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:08,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2904 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-10-27 14:21:08,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048374118] [2020-10-27 14:21:08,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:08,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:21:08,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358095474] [2020-10-27 14:21:08,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:21:08,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:08,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:21:08,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:21:08,287 INFO L87 Difference]: Start difference. First operand 297 states and 304 transitions. Second operand 26 states. [2020-10-27 14:21:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:09,234 INFO L93 Difference]: Finished difference Result 558 states and 576 transitions. [2020-10-27 14:21:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:21:09,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 291 [2020-10-27 14:21:09,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:09,237 INFO L225 Difference]: With dead ends: 558 [2020-10-27 14:21:09,238 INFO L226 Difference]: Without dead ends: 315 [2020-10-27 14:21:09,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:21:09,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-27 14:21:09,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 309. [2020-10-27 14:21:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-27 14:21:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 316 transitions. [2020-10-27 14:21:09,253 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 316 transitions. Word has length 291 [2020-10-27 14:21:09,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:09,253 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 316 transitions. [2020-10-27 14:21:09,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:21:09,253 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 316 transitions. [2020-10-27 14:21:09,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-27 14:21:09,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:09,256 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:09,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:21:09,256 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:09,257 INFO L82 PathProgramCache]: Analyzing trace with hash 519967986, now seen corresponding path program 23 times [2020-10-27 14:21:09,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:09,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096037645] [2020-10-27 14:21:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:09,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:09,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:09,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:09,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:09,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:14,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:14,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-27 14:21:14,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:14,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:21:14,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:14,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:21:14,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-27 14:21:14,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:21:14,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:14,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:14,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:14,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:14,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:14,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:14,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:21:14,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:14,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:14,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:14,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:14,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3174 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2645 trivial. 0 not checked. [2020-10-27 14:21:14,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096037645] [2020-10-27 14:21:14,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:14,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:21:14,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520021833] [2020-10-27 14:21:14,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:21:14,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:14,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:21:14,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:14,887 INFO L87 Difference]: Start difference. First operand 309 states and 316 transitions. Second operand 27 states. [2020-10-27 14:21:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:15,933 INFO L93 Difference]: Finished difference Result 580 states and 598 transitions. [2020-10-27 14:21:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:21:15,934 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 303 [2020-10-27 14:21:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:15,936 INFO L225 Difference]: With dead ends: 580 [2020-10-27 14:21:15,937 INFO L226 Difference]: Without dead ends: 327 [2020-10-27 14:21:15,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:15,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-27 14:21:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 321. [2020-10-27 14:21:15,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-27 14:21:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 328 transitions. [2020-10-27 14:21:15,963 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 328 transitions. Word has length 303 [2020-10-27 14:21:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:15,964 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 328 transitions. [2020-10-27 14:21:15,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:21:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 328 transitions. [2020-10-27 14:21:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-27 14:21:15,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:15,968 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:15,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:21:15,970 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1979379046, now seen corresponding path program 24 times [2020-10-27 14:21:15,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:15,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158982888] [2020-10-27 14:21:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:16,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:16,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:16,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:16,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:16,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:21,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:21,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-27 14:21:21,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:21,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-27 14:21:21,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:21:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-27 14:21:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:21:21,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:21,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:21,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:21,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:21,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:21,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:21,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:21,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:21,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:21,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:21,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:21,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3456 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 2880 trivial. 0 not checked. [2020-10-27 14:21:21,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158982888] [2020-10-27 14:21:21,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:21,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:21:21,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931186014] [2020-10-27 14:21:21,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:21:21,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:21,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:21:21,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:21:21,798 INFO L87 Difference]: Start difference. First operand 321 states and 328 transitions. Second operand 28 states. [2020-10-27 14:21:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:22,853 INFO L93 Difference]: Finished difference Result 602 states and 620 transitions. [2020-10-27 14:21:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:21:22,853 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 315 [2020-10-27 14:21:22,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:22,856 INFO L225 Difference]: With dead ends: 602 [2020-10-27 14:21:22,856 INFO L226 Difference]: Without dead ends: 339 [2020-10-27 14:21:22,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:21:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-27 14:21:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 333. [2020-10-27 14:21:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-27 14:21:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 340 transitions. [2020-10-27 14:21:22,869 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 340 transitions. Word has length 315 [2020-10-27 14:21:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:22,869 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 340 transitions. [2020-10-27 14:21:22,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:21:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 340 transitions. [2020-10-27 14:21:22,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-27 14:21:22,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:22,872 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:22,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:21:22,872 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:22,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:22,873 INFO L82 PathProgramCache]: Analyzing trace with hash 211519450, now seen corresponding path program 25 times [2020-10-27 14:21:22,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:22,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178225062] [2020-10-27 14:21:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:22,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:22,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:23,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:23,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:23,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:28,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:28,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-27 14:21:28,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:28,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5141 [2020-10-27 14:21:28,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:28,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:21:28,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-27 14:21:28,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:21:28,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:28,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:28,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:28,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:28,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:28,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:28,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:28,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:28,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:28,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:28,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:28,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3750 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3125 trivial. 0 not checked. [2020-10-27 14:21:28,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178225062] [2020-10-27 14:21:28,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:28,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:21:28,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248818711] [2020-10-27 14:21:28,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:21:28,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:28,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:21:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:21:28,780 INFO L87 Difference]: Start difference. First operand 333 states and 340 transitions. Second operand 29 states. [2020-10-27 14:21:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:29,904 INFO L93 Difference]: Finished difference Result 624 states and 642 transitions. [2020-10-27 14:21:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:21:29,904 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 327 [2020-10-27 14:21:29,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:29,907 INFO L225 Difference]: With dead ends: 624 [2020-10-27 14:21:29,907 INFO L226 Difference]: Without dead ends: 351 [2020-10-27 14:21:29,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:21:29,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-27 14:21:29,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 345. [2020-10-27 14:21:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-27 14:21:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 352 transitions. [2020-10-27 14:21:29,921 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 352 transitions. Word has length 327 [2020-10-27 14:21:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:29,922 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 352 transitions. [2020-10-27 14:21:29,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:21:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 352 transitions. [2020-10-27 14:21:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-27 14:21:29,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:29,924 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:29,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:21:29,925 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:29,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1467016270, now seen corresponding path program 26 times [2020-10-27 14:21:29,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:29,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037297006] [2020-10-27 14:21:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:29,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:30,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:30,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:30,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:30,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:36,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:36,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 349 [2020-10-27 14:21:36,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:36,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6850 [2020-10-27 14:21:36,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:36,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:21:36,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 175 [2020-10-27 14:21:36,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:21:36,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:37,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:37,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:37,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:37,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:37,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:37,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:37,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:37,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:37,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:37,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:37,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4056 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 3380 trivial. 0 not checked. [2020-10-27 14:21:37,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037297006] [2020-10-27 14:21:37,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:37,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:21:37,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896512308] [2020-10-27 14:21:37,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:21:37,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:37,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:21:37,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:21:37,565 INFO L87 Difference]: Start difference. First operand 345 states and 352 transitions. Second operand 30 states. [2020-10-27 14:21:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:38,722 INFO L93 Difference]: Finished difference Result 646 states and 664 transitions. [2020-10-27 14:21:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:21:38,723 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 339 [2020-10-27 14:21:38,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:38,726 INFO L225 Difference]: With dead ends: 646 [2020-10-27 14:21:38,726 INFO L226 Difference]: Without dead ends: 363 [2020-10-27 14:21:38,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:21:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-27 14:21:38,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 357. [2020-10-27 14:21:38,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-27 14:21:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 364 transitions. [2020-10-27 14:21:38,739 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 364 transitions. Word has length 339 [2020-10-27 14:21:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:38,739 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 364 transitions. [2020-10-27 14:21:38,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:21:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 364 transitions. [2020-10-27 14:21:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-27 14:21:38,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:38,742 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:38,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:21:38,742 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:38,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1769209150, now seen corresponding path program 27 times [2020-10-27 14:21:38,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:38,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288814648] [2020-10-27 14:21:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:38,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:38,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:38,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:39,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:39,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:43,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:43,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-27 14:21:43,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:43,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:21:43,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:43,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:21:43,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-27 14:21:43,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:21:43,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:44,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:44,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:44,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:44,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:44,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:44,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:44,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:44,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:44,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:44,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:44,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4374 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 3645 trivial. 0 not checked. [2020-10-27 14:21:44,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288814648] [2020-10-27 14:21:44,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:44,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:21:44,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675589317] [2020-10-27 14:21:44,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:21:44,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:44,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:21:44,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:21:44,544 INFO L87 Difference]: Start difference. First operand 357 states and 364 transitions. Second operand 31 states. [2020-10-27 14:21:45,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:45,786 INFO L93 Difference]: Finished difference Result 668 states and 686 transitions. [2020-10-27 14:21:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:21:45,786 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 351 [2020-10-27 14:21:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:45,789 INFO L225 Difference]: With dead ends: 668 [2020-10-27 14:21:45,789 INFO L226 Difference]: Without dead ends: 375 [2020-10-27 14:21:45,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:21:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-27 14:21:45,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 369. [2020-10-27 14:21:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-27 14:21:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 376 transitions. [2020-10-27 14:21:45,802 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 376 transitions. Word has length 351 [2020-10-27 14:21:45,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:45,802 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 376 transitions. [2020-10-27 14:21:45,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:21:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 376 transitions. [2020-10-27 14:21:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-10-27 14:21:45,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:45,805 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:45,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:21:45,805 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:45,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:45,806 INFO L82 PathProgramCache]: Analyzing trace with hash -713170122, now seen corresponding path program 28 times [2020-10-27 14:21:45,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:45,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905641423] [2020-10-27 14:21:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:45,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:45,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:45,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:46,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:46,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:50,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:50,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-27 14:21:50,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:50,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-27 14:21:50,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:50,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:21:50,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-27 14:21:50,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:21:50,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:51,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:51,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:51,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:51,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:51,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:51,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:51,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:51,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:51,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:51,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:51,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 3920 trivial. 0 not checked. [2020-10-27 14:21:51,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905641423] [2020-10-27 14:21:51,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:51,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:21:51,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25722003] [2020-10-27 14:21:51,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:21:51,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:51,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:21:51,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:21:51,738 INFO L87 Difference]: Start difference. First operand 369 states and 376 transitions. Second operand 32 states. [2020-10-27 14:21:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:53,048 INFO L93 Difference]: Finished difference Result 690 states and 708 transitions. [2020-10-27 14:21:53,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:21:53,049 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 363 [2020-10-27 14:21:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:53,051 INFO L225 Difference]: With dead ends: 690 [2020-10-27 14:21:53,051 INFO L226 Difference]: Without dead ends: 387 [2020-10-27 14:21:53,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:21:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2020-10-27 14:21:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 381. [2020-10-27 14:21:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-27 14:21:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 388 transitions. [2020-10-27 14:21:53,064 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 388 transitions. Word has length 363 [2020-10-27 14:21:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:53,064 INFO L481 AbstractCegarLoop]: Abstraction has 381 states and 388 transitions. [2020-10-27 14:21:53,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:21:53,064 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 388 transitions. [2020-10-27 14:21:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-10-27 14:21:53,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:53,067 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:53,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:21:53,068 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash -346585686, now seen corresponding path program 29 times [2020-10-27 14:21:53,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:53,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284834976] [2020-10-27 14:21:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:53,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:53,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:53,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:53,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:53,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:58,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:58,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-27 14:21:58,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:58,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5478 [2020-10-27 14:21:58,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:58,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:21:58,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-27 14:21:58,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:21:58,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:59,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:59,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:59,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:59,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:59,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:59,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:59,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:59,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:59,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:59,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:59,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5046 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 4205 trivial. 0 not checked. [2020-10-27 14:21:59,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284834976] [2020-10-27 14:21:59,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:59,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:21:59,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461913515] [2020-10-27 14:21:59,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:21:59,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:59,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:21:59,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:21:59,467 INFO L87 Difference]: Start difference. First operand 381 states and 388 transitions. Second operand 33 states. [2020-10-27 14:22:00,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:00,640 INFO L93 Difference]: Finished difference Result 712 states and 730 transitions. [2020-10-27 14:22:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:22:00,640 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 375 [2020-10-27 14:22:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:00,644 INFO L225 Difference]: With dead ends: 712 [2020-10-27 14:22:00,644 INFO L226 Difference]: Without dead ends: 399 [2020-10-27 14:22:00,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:22:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-10-27 14:22:00,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 393. [2020-10-27 14:22:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-10-27 14:22:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 400 transitions. [2020-10-27 14:22:00,657 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 400 transitions. Word has length 375 [2020-10-27 14:22:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:00,657 INFO L481 AbstractCegarLoop]: Abstraction has 393 states and 400 transitions. [2020-10-27 14:22:00,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:22:00,657 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 400 transitions. [2020-10-27 14:22:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-10-27 14:22:00,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:00,660 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:00,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:22:00,661 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:00,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:00,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2057955870, now seen corresponding path program 30 times [2020-10-27 14:22:00,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:00,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061698729] [2020-10-27 14:22:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:00,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:00,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:00,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:00,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:01,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:06,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:06,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 397 [2020-10-27 14:22:06,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:06,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5563 [2020-10-27 14:22:06,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:06,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:22:06,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 199 [2020-10-27 14:22:06,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:22:06,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:07,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:07,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:07,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:07,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:07,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:07,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:22:07,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:07,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:07,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:07,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:07,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5400 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 4500 trivial. 0 not checked. [2020-10-27 14:22:07,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061698729] [2020-10-27 14:22:07,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:07,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:22:07,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670482375] [2020-10-27 14:22:07,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:22:07,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:07,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:22:07,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:22:07,179 INFO L87 Difference]: Start difference. First operand 393 states and 400 transitions. Second operand 34 states. [2020-10-27 14:22:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:08,607 INFO L93 Difference]: Finished difference Result 734 states and 752 transitions. [2020-10-27 14:22:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:22:08,608 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 387 [2020-10-27 14:22:08,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:08,610 INFO L225 Difference]: With dead ends: 734 [2020-10-27 14:22:08,610 INFO L226 Difference]: Without dead ends: 411 [2020-10-27 14:22:08,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:22:08,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-27 14:22:08,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 405. [2020-10-27 14:22:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-27 14:22:08,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 412 transitions. [2020-10-27 14:22:08,624 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 412 transitions. Word has length 387 [2020-10-27 14:22:08,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:08,624 INFO L481 AbstractCegarLoop]: Abstraction has 405 states and 412 transitions. [2020-10-27 14:22:08,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:22:08,624 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 412 transitions. [2020-10-27 14:22:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2020-10-27 14:22:08,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:08,627 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:08,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:22:08,628 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash -242872174, now seen corresponding path program 31 times [2020-10-27 14:22:08,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:08,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359317571] [2020-10-27 14:22:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:08,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:08,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:08,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:08,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:08,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:13,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:13,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 409 [2020-10-27 14:22:13,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:13,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5245 [2020-10-27 14:22:13,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:13,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:22:13,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-10-27 14:22:13,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 14:22:13,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:14,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:14,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:14,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:14,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:14,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:14,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:14,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:14,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:14,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:14,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:14,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5766 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 4805 trivial. 0 not checked. [2020-10-27 14:22:14,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359317571] [2020-10-27 14:22:14,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:14,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:22:14,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579009085] [2020-10-27 14:22:14,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:22:14,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:14,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:22:14,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:22:14,896 INFO L87 Difference]: Start difference. First operand 405 states and 412 transitions. Second operand 35 states. [2020-10-27 14:22:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:16,365 INFO L93 Difference]: Finished difference Result 756 states and 774 transitions. [2020-10-27 14:22:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:22:16,366 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 399 [2020-10-27 14:22:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:16,370 INFO L225 Difference]: With dead ends: 756 [2020-10-27 14:22:16,370 INFO L226 Difference]: Without dead ends: 423 [2020-10-27 14:22:16,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:22:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-27 14:22:16,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 417. [2020-10-27 14:22:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-10-27 14:22:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 424 transitions. [2020-10-27 14:22:16,383 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 424 transitions. Word has length 399 [2020-10-27 14:22:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:16,383 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 424 transitions. [2020-10-27 14:22:16,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:22:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 424 transitions. [2020-10-27 14:22:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-10-27 14:22:16,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:16,386 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:16,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:22:16,387 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:16,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1988298490, now seen corresponding path program 32 times [2020-10-27 14:22:16,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:16,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406259879] [2020-10-27 14:22:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:16,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:16,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:16,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:16,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:16,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:22,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:22,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-10-27 14:22:22,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:22,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5626 [2020-10-27 14:22:22,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:22,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:22:22,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 211 [2020-10-27 14:22:22,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:22:22,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:22,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:22,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:22,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:22,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:22,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:22,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:22:22,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:22,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:22,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:22,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:22,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6144 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5120 trivial. 0 not checked. [2020-10-27 14:22:23,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406259879] [2020-10-27 14:22:23,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:23,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:22:23,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592581574] [2020-10-27 14:22:23,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:22:23,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:23,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:22:23,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:22:23,070 INFO L87 Difference]: Start difference. First operand 417 states and 424 transitions. Second operand 36 states. [2020-10-27 14:22:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:24,576 INFO L93 Difference]: Finished difference Result 778 states and 796 transitions. [2020-10-27 14:22:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:22:24,576 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 411 [2020-10-27 14:22:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:24,579 INFO L225 Difference]: With dead ends: 778 [2020-10-27 14:22:24,579 INFO L226 Difference]: Without dead ends: 435 [2020-10-27 14:22:24,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:22:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-27 14:22:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 429. [2020-10-27 14:22:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-10-27 14:22:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 436 transitions. [2020-10-27 14:22:24,593 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 436 transitions. Word has length 411 [2020-10-27 14:22:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:24,593 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 436 transitions. [2020-10-27 14:22:24,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:22:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 436 transitions. [2020-10-27 14:22:24,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-10-27 14:22:24,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:24,596 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:24,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:22:24,597 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:24,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:24,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1201644410, now seen corresponding path program 33 times [2020-10-27 14:22:24,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:24,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299128861] [2020-10-27 14:22:24,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:24,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:24,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:24,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:24,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:24,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:30,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:30,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 433 [2020-10-27 14:22:30,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:30,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5416 [2020-10-27 14:22:30,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:30,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:22:30,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 217 [2020-10-27 14:22:30,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:22:30,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:31,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:31,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:31,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:31,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:31,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:31,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:31,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:31,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:31,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:31,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:31,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5445 trivial. 0 not checked. [2020-10-27 14:22:31,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299128861] [2020-10-27 14:22:31,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:31,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:22:31,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490732926] [2020-10-27 14:22:31,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:22:31,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:31,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:22:31,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:22:31,143 INFO L87 Difference]: Start difference. First operand 429 states and 436 transitions. Second operand 37 states. [2020-10-27 14:22:32,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:32,731 INFO L93 Difference]: Finished difference Result 800 states and 818 transitions. [2020-10-27 14:22:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:22:32,732 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 423 [2020-10-27 14:22:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:32,735 INFO L225 Difference]: With dead ends: 800 [2020-10-27 14:22:32,735 INFO L226 Difference]: Without dead ends: 447 [2020-10-27 14:22:32,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:22:32,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-27 14:22:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2020-10-27 14:22:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-27 14:22:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 448 transitions. [2020-10-27 14:22:32,751 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 448 transitions. Word has length 423 [2020-10-27 14:22:32,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:32,752 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 448 transitions. [2020-10-27 14:22:32,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:22:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 448 transitions. [2020-10-27 14:22:32,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-10-27 14:22:32,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:32,755 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:32,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:22:32,756 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:32,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:32,756 INFO L82 PathProgramCache]: Analyzing trace with hash -58781714, now seen corresponding path program 34 times [2020-10-27 14:22:32,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:32,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722430076] [2020-10-27 14:22:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:32,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:32,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:32,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:33,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:33,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking...