/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-programs/copysome1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:51:41,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:51:41,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:51:41,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:51:41,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:51:41,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:51:41,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:51:41,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:51:41,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:51:41,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:51:41,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:51:41,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:51:41,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:51:41,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:51:41,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:51:41,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:51:41,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:51:41,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:51:41,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:51:41,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:51:41,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:51:41,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:51:41,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:51:41,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:51:41,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:51:41,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:51:41,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:51:41,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:51:41,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:51:41,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:51:41,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:51:41,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:51:41,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:51:41,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:51:41,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:51:41,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:51:41,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:51:41,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:51:41,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:51:41,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:51:41,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:51:41,141 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 14:51:41,180 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:51:41,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:51:41,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:51:41,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:51:41,182 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:51:41,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:51:41,183 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:51:41,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:51:41,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:51:41,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:51:41,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:51:41,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:51:41,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:51:41,184 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:51:41,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:51:41,184 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:51:41,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:51:41,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:51:41,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:51:41,185 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:51:41,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:51:41,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:51:41,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:51:41,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:51:41,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:51:41,187 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:51:41,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:51:41,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:51:41,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:51:41,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:51:41,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:51:41,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:51:41,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:51:41,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:51:41,663 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:51:41,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-2.i [2020-10-27 14:51:41,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2a8c5632/94e2872f33a84e5fa56c3c67896776c4/FLAGa03dc4122 [2020-10-27 14:51:42,472 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:51:42,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-programs/copysome1-2.i [2020-10-27 14:51:42,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2a8c5632/94e2872f33a84e5fa56c3c67896776c4/FLAGa03dc4122 [2020-10-27 14:51:42,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2a8c5632/94e2872f33a84e5fa56c3c67896776c4 [2020-10-27 14:51:42,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:51:42,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:51:42,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:51:42,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:51:42,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:51:42,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:51:42" (1/1) ... [2020-10-27 14:51:42,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10d7d9d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:42, skipping insertion in model container [2020-10-27 14:51:42,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:51:42" (1/1) ... [2020-10-27 14:51:42,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:51:42,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:51:43,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:51:43,069 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:51:43,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:51:43,109 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:51:43,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:43 WrapperNode [2020-10-27 14:51:43,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:51:43,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:51:43,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:51:43,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:51:43,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:43" (1/1) ... [2020-10-27 14:51:43,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:43" (1/1) ... [2020-10-27 14:51:43,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:43" (1/1) ... [2020-10-27 14:51:43,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:43" (1/1) ... [2020-10-27 14:51:43,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:43" (1/1) ... [2020-10-27 14:51:43,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:43" (1/1) ... [2020-10-27 14:51:43,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:43" (1/1) ... [2020-10-27 14:51:43,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:51:43,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:51:43,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:51:43,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:51:43,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:43" (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 14:51:43,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:51:43,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:51:43,241 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:51:43,241 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:51:43,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:51:43,242 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:51:43,242 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:51:43,242 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:51:43,242 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:51:43,242 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:51:43,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:51:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:51:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:51:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:51:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:51:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:51:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:51:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:51:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:51:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:51:43,576 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:51:43,576 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-27 14:51:43,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:51:43 BoogieIcfgContainer [2020-10-27 14:51:43,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:51:43,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:51:43,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:51:43,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:51:43,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:51:42" (1/3) ... [2020-10-27 14:51:43,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430f07c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:51:43, skipping insertion in model container [2020-10-27 14:51:43,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:51:43" (2/3) ... [2020-10-27 14:51:43,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430f07c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:51:43, skipping insertion in model container [2020-10-27 14:51:43,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:51:43" (3/3) ... [2020-10-27 14:51:43,592 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2020-10-27 14:51:43,607 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:51:43,613 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:51:43,630 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:51:43,668 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:51:43,671 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:51:43,671 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:51:43,671 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:51:43,671 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:51:43,671 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:51:43,671 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:51:43,672 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:51:43,692 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-27 14:51:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 14:51:43,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:43,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:43,702 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:43,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:43,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1436436000, now seen corresponding path program 1 times [2020-10-27 14:51:43,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:43,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367916051] [2020-10-27 14:51:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:43,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:44,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:44,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:44,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 14:51:44,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:51:44,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-27 14:51:44,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:44,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:44,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 14:51:44,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:44,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:51:44,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:44,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:44,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:44,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:44,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:44,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 14:51:44,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:44,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:44,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:44,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:44,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:44,377 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 14:51:44,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367916051] [2020-10-27 14:51:44,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:51:44,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:51:44,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437719174] [2020-10-27 14:51:44,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:51:44,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:44,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:51:44,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:51:44,406 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-10-27 14:51:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:44,512 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2020-10-27 14:51:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:51:44,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-27 14:51:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:44,522 INFO L225 Difference]: With dead ends: 57 [2020-10-27 14:51:44,522 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 14:51:44,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:51:44,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 14:51:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 14:51:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 14:51:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-27 14:51:44,570 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 18 [2020-10-27 14:51:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:44,571 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-27 14:51:44,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:51:44,571 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-27 14:51:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 14:51:44,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:44,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:44,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:51:44,573 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:44,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:44,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1471379055, now seen corresponding path program 1 times [2020-10-27 14:51:44,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:44,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486483830] [2020-10-27 14:51:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:44,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:44,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:44,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:44,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 14:51:44,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:51:44,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-27 14:51:44,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:51:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:51:44,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:51:44,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:44,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:44,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:44,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:44,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:44,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:44,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:51:44,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:44,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:44,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:44,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:44,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:44,963 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 14:51:44,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486483830] [2020-10-27 14:51:44,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:51:44,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:51:44,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130167491] [2020-10-27 14:51:44,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:51:44,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:44,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:51:44,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:51:44,975 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states. [2020-10-27 14:51:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:45,078 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2020-10-27 14:51:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:51:45,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 14:51:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:45,080 INFO L225 Difference]: With dead ends: 49 [2020-10-27 14:51:45,080 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 14:51:45,082 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 14:51:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 14:51:45,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-27 14:51:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 14:51:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-27 14:51:45,090 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2020-10-27 14:51:45,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:45,091 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-27 14:51:45,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:51:45,091 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-27 14:51:45,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 14:51:45,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:45,092 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] [2020-10-27 14:51:45,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:51:45,093 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash 435813880, now seen corresponding path program 1 times [2020-10-27 14:51:45,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:45,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624474265] [2020-10-27 14:51:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:45,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:45,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:45,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:46,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:46,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 14:51:46,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:51:46,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1133 [2020-10-27 14:51:46,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:46,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:51:46,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:51:46,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:51:46,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:46,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:46,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:46,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:46,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:46,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:46,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:51:46,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:46,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:46,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:46,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:46,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:51:46,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624474265] [2020-10-27 14:51:46,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:46,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:51:46,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137750859] [2020-10-27 14:51:46,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:51:46,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:46,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:51:46,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:51:46,308 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-10-27 14:51:46,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:46,421 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-10-27 14:51:46,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:51:46,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 14:51:46,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:46,423 INFO L225 Difference]: With dead ends: 55 [2020-10-27 14:51:46,423 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 14:51:46,424 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 14:51:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 14:51:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-27 14:51:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:51:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-27 14:51:46,433 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-27 14:51:46,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:46,433 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-27 14:51:46,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:51:46,433 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-27 14:51:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 14:51:46,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:46,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:46,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:51:46,435 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:46,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:46,436 INFO L82 PathProgramCache]: Analyzing trace with hash -943322827, now seen corresponding path program 2 times [2020-10-27 14:51:46,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:46,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675138594] [2020-10-27 14:51:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:46,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:46,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:46,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:48,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:48,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 14:51:48,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:51:48,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1872 [2020-10-27 14:51:48,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:51:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:51:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:51:48,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:48,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:48,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:48,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:48,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:48,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:48,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:51:48,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:48,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:48,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:48,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:48,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 14:51:48,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675138594] [2020-10-27 14:51:48,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:48,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:51:48,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985463840] [2020-10-27 14:51:48,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:51:48,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:48,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:51:48,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:51:48,395 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 6 states. [2020-10-27 14:51:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:48,514 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2020-10-27 14:51:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:51:48,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-27 14:51:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:48,516 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:51:48,516 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:51:48,517 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 14:51:48,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:51:48,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-27 14:51:48,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 14:51:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-27 14:51:48,526 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 28 [2020-10-27 14:51:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:48,526 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-27 14:51:48,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:51:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-27 14:51:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:51:48,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:48,528 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:48,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:51:48,528 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:48,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:48,529 INFO L82 PathProgramCache]: Analyzing trace with hash -600953260, now seen corresponding path program 3 times [2020-10-27 14:51:48,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:48,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673116310] [2020-10-27 14:51:48,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:48,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:48,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:48,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:53,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:53,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:51:53,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:51:53,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:51:53,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:51:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 14:51:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 14:51:53,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:53,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:53,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:53,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:53,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:53,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:53,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:51:53,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:53,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:53,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:53,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:53,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 14:51:53,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673116310] [2020-10-27 14:51:53,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:53,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:51:53,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924590819] [2020-10-27 14:51:53,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:51:53,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:53,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:51:53,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:51:53,664 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-10-27 14:51:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:53,850 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-10-27 14:51:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:51:53,851 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-27 14:51:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:53,852 INFO L225 Difference]: With dead ends: 71 [2020-10-27 14:51:53,852 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 14:51:53,853 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 14:51:53,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 14:51:53,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-27 14:51:53,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 14:51:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-27 14:51:53,861 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 33 [2020-10-27 14:51:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:53,861 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-27 14:51:53,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:51:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-27 14:51:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 14:51:53,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:53,863 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:53,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:51:53,863 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:53,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:53,864 INFO L82 PathProgramCache]: Analyzing trace with hash -40650535, now seen corresponding path program 4 times [2020-10-27 14:51:53,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:53,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783023469] [2020-10-27 14:51:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:53,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:53,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:54,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:58,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:58,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 14:51:58,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:51:58,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:51:58,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:58,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:51:58,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:51:58,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:51:58,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:59,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:51:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:59,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:59,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:51:59,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:51:59,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:51:59,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:51:59,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:51:59,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:51:59,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:51:59,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:51:59,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:51:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 14:51:59,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783023469] [2020-10-27 14:51:59,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:51:59,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:51:59,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162526295] [2020-10-27 14:51:59,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:51:59,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:51:59,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:51:59,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:51:59,034 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 8 states. [2020-10-27 14:51:59,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:51:59,195 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2020-10-27 14:51:59,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:51:59,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-27 14:51:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:51:59,197 INFO L225 Difference]: With dead ends: 79 [2020-10-27 14:51:59,197 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 14:51:59,198 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 14:51:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 14:51:59,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-10-27 14:51:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 14:51:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-27 14:51:59,205 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 38 [2020-10-27 14:51:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:51:59,206 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-27 14:51:59,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:51:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-27 14:51:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:51:59,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:51:59,207 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:51:59,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:51:59,208 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:51:59,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:51:59,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1245770064, now seen corresponding path program 5 times [2020-10-27 14:51:59,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:51:59,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073875290] [2020-10-27 14:51:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:51:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:51:59,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:59,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:51:59,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:04,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:04,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 14:52:04,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:04,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:52:04,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:04,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:52:04,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:52:04,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 14:52:04,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:04,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:04,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:04,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:04,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:04,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:04,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:52:04,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:04,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:04,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:04,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:04,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 14:52:04,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073875290] [2020-10-27 14:52:04,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:04,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:52:04,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110644220] [2020-10-27 14:52:04,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:52:04,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:04,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:52:04,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:52:04,341 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 9 states. [2020-10-27 14:52:04,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:04,509 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-10-27 14:52:04,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:52:04,510 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-27 14:52:04,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:04,510 INFO L225 Difference]: With dead ends: 87 [2020-10-27 14:52:04,511 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 14:52:04,511 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 14:52:04,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 14:52:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-27 14:52:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:52:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-27 14:52:04,523 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 43 [2020-10-27 14:52:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:04,523 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-27 14:52:04,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:52:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-27 14:52:04,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:52:04,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:04,528 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:04,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:52:04,528 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:04,529 INFO L82 PathProgramCache]: Analyzing trace with hash -25962371, now seen corresponding path program 6 times [2020-10-27 14:52:04,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:04,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864934155] [2020-10-27 14:52:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:04,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:04,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:04,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:09,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:52:09,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:09,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:52:09,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:09,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:52:09,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:52:09,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:52:09,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:09,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:09,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:09,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:09,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:09,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:52:09,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:09,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:09,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:09,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:09,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-27 14:52:09,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864934155] [2020-10-27 14:52:09,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:09,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:52:09,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861126242] [2020-10-27 14:52:09,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:52:09,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:09,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:52:09,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:52:09,694 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 10 states. [2020-10-27 14:52:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:09,835 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2020-10-27 14:52:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:52:09,835 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-10-27 14:52:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:09,837 INFO L225 Difference]: With dead ends: 95 [2020-10-27 14:52:09,837 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 14:52:09,838 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 14:52:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 14:52:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-27 14:52:09,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 14:52:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-10-27 14:52:09,845 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 48 [2020-10-27 14:52:09,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:09,846 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-10-27 14:52:09,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:52:09,846 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-10-27 14:52:09,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 14:52:09,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:09,848 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:09,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:52:09,848 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:09,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:09,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1389469940, now seen corresponding path program 7 times [2020-10-27 14:52:09,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:09,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867618016] [2020-10-27 14:52:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:09,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:09,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:12,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:14,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:52:14,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:14,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:52:14,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:14,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:52:14,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:52:14,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 14:52:14,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:14,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:14,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:14,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:14,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:14,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:14,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:14,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:14,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:14,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:14,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-27 14:52:15,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867618016] [2020-10-27 14:52:15,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:15,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:52:15,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908083391] [2020-10-27 14:52:15,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:52:15,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:15,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:52:15,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:52:15,004 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 11 states. [2020-10-27 14:52:15,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:15,165 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2020-10-27 14:52:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:52:15,166 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-27 14:52:15,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:15,167 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:52:15,167 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:52:15,168 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 14:52:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:52:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-27 14:52:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:52:15,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2020-10-27 14:52:15,175 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 53 [2020-10-27 14:52:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:15,176 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2020-10-27 14:52:15,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:52:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2020-10-27 14:52:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 14:52:15,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:15,177 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:15,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:52:15,177 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:15,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:15,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1369745441, now seen corresponding path program 8 times [2020-10-27 14:52:15,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:15,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199429711] [2020-10-27 14:52:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:15,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:17,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:20,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:20,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 14:52:20,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:20,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:52:20,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:20,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:52:20,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:52:20,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:52:20,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:20,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:20,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:20,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:20,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:20,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:20,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:20,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:20,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:20,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-27 14:52:20,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199429711] [2020-10-27 14:52:20,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:20,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:52:20,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40838611] [2020-10-27 14:52:20,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:52:20,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:20,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:52:20,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:52:20,384 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 12 states. [2020-10-27 14:52:20,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:20,586 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2020-10-27 14:52:20,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:52:20,587 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-10-27 14:52:20,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:20,588 INFO L225 Difference]: With dead ends: 111 [2020-10-27 14:52:20,588 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:52:20,589 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 14:52:20,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:52:20,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-27 14:52:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 14:52:20,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2020-10-27 14:52:20,602 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 58 [2020-10-27 14:52:20,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:20,603 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2020-10-27 14:52:20,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:52:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2020-10-27 14:52:20,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:52:20,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:20,605 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:20,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:52:20,605 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:20,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:20,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1685970792, now seen corresponding path program 9 times [2020-10-27 14:52:20,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:20,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902358576] [2020-10-27 14:52:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:20,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:20,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:24,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:25,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:25,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:52:25,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:25,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 14:52:25,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:25,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:52:25,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-27 14:52:25,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 14:52:25,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:25,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:25,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:25,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:25,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:25,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:25,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:52:25,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:25,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:25,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:25,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:25,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 14:52:25,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902358576] [2020-10-27 14:52:25,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:25,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:52:25,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793135586] [2020-10-27 14:52:25,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:52:25,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:25,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:52:25,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:52:25,821 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 13 states. [2020-10-27 14:52:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:26,013 INFO L93 Difference]: Finished difference Result 119 states and 146 transitions. [2020-10-27 14:52:26,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:52:26,014 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2020-10-27 14:52:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:26,017 INFO L225 Difference]: With dead ends: 119 [2020-10-27 14:52:26,017 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 14:52:26,018 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 14:52:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 14:52:26,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-27 14:52:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 14:52:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-10-27 14:52:26,030 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 63 [2020-10-27 14:52:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:26,031 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-10-27 14:52:26,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:52:26,031 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-10-27 14:52:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 14:52:26,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:26,032 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:26,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:52:26,035 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:26,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:26,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1961125829, now seen corresponding path program 10 times [2020-10-27 14:52:26,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:26,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552586421] [2020-10-27 14:52:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:26,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:26,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:30,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:31,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:31,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 14:52:31,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:52:31,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5109 [2020-10-27 14:52:31,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:31,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:52:31,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:52:31,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:52:31,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:31,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:31,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:31,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:31,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:31,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:31,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:31,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:31,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:31,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:31,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:31,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 14:52:31,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552586421] [2020-10-27 14:52:31,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:31,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:52:31,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510997905] [2020-10-27 14:52:31,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:52:31,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:31,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:52:31,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:52:31,350 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 14 states. [2020-10-27 14:52:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:31,536 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2020-10-27 14:52:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:52:31,536 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-10-27 14:52:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:31,537 INFO L225 Difference]: With dead ends: 127 [2020-10-27 14:52:31,538 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 14:52:31,538 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 14:52:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 14:52:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-10-27 14:52:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 14:52:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-10-27 14:52:31,550 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 68 [2020-10-27 14:52:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:31,550 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-10-27 14:52:31,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:52:31,551 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-10-27 14:52:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 14:52:31,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:31,555 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:31,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:52:31,556 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:31,557 INFO L82 PathProgramCache]: Analyzing trace with hash -181448764, now seen corresponding path program 11 times [2020-10-27 14:52:31,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:31,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82382352] [2020-10-27 14:52:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:31,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:31,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:36,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:36,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:52:36,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:52:36,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:52:36,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:36,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:52:36,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 14:52:36,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 14:52:36,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:36,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:36,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:36,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:36,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:36,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:36,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:36,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:36,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:36,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:36,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:36,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-27 14:52:36,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82382352] [2020-10-27 14:52:36,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:36,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:52:36,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117854021] [2020-10-27 14:52:36,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:52:36,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:36,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:52:36,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:52:36,759 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 15 states. [2020-10-27 14:52:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:36,973 INFO L93 Difference]: Finished difference Result 135 states and 166 transitions. [2020-10-27 14:52:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:52:36,973 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-10-27 14:52:36,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:36,974 INFO L225 Difference]: With dead ends: 135 [2020-10-27 14:52:36,975 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 14:52:36,975 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 14:52:36,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 14:52:36,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-10-27 14:52:36,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:52:36,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2020-10-27 14:52:36,982 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 73 [2020-10-27 14:52:36,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:36,983 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2020-10-27 14:52:36,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:52:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2020-10-27 14:52:36,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 14:52:36,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:36,984 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:36,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:52:36,984 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash 7427945, now seen corresponding path program 12 times [2020-10-27 14:52:36,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:36,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426976036] [2020-10-27 14:52:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:37,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:37,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:42,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:42,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 14:52:42,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:52:42,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 14:52:42,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:42,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:52:42,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:52:42,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:52:42,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:42,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:42,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:42,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:42,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:42,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:42,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:42,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:42,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:42,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:42,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-27 14:52:42,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426976036] [2020-10-27 14:52:42,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:42,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:52:42,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147346451] [2020-10-27 14:52:42,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:52:42,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:42,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:52:42,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:52:42,211 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand 16 states. [2020-10-27 14:52:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:42,511 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2020-10-27 14:52:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:52:42,512 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-10-27 14:52:42,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:42,513 INFO L225 Difference]: With dead ends: 143 [2020-10-27 14:52:42,513 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 14:52:42,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:52:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 14:52:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-10-27 14:52:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-27 14:52:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2020-10-27 14:52:42,520 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 78 [2020-10-27 14:52:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:42,521 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2020-10-27 14:52:42,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:52:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2020-10-27 14:52:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:52:42,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:42,522 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:42,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:52:42,522 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:42,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:42,523 INFO L82 PathProgramCache]: Analyzing trace with hash -867930080, now seen corresponding path program 13 times [2020-10-27 14:52:42,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:42,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160534496] [2020-10-27 14:52:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:42,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:42,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:47,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:47,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 14:52:47,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:52:47,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 14:52:47,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:47,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:52:47,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:52:47,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 14:52:47,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:47,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:47,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:47,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:47,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:47,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:47,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:47,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:47,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:47,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:47,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:47,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-27 14:52:47,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160534496] [2020-10-27 14:52:47,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:47,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:52:47,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859473294] [2020-10-27 14:52:47,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:52:47,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:47,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:52:47,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:52:47,787 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand 17 states. [2020-10-27 14:52:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:48,041 INFO L93 Difference]: Finished difference Result 151 states and 186 transitions. [2020-10-27 14:52:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:52:48,042 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-10-27 14:52:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:48,043 INFO L225 Difference]: With dead ends: 151 [2020-10-27 14:52:48,043 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 14:52:48,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:52:48,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 14:52:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-10-27 14:52:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:52:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2020-10-27 14:52:48,058 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 83 [2020-10-27 14:52:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:48,058 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2020-10-27 14:52:48,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:52:48,059 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2020-10-27 14:52:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 14:52:48,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:48,060 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:48,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:52:48,060 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:48,060 INFO L82 PathProgramCache]: Analyzing trace with hash -888555763, now seen corresponding path program 14 times [2020-10-27 14:52:48,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:48,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095086344] [2020-10-27 14:52:48,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:48,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:48,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:53,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:53,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 14:52:53,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:52:53,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 14:52:53,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:53,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:52:53,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:52:53,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:52:53,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:53,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:53,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:53,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:53,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:53,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:53,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:53,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:53,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-27 14:52:53,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095086344] [2020-10-27 14:52:53,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:53,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:52:53,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051284338] [2020-10-27 14:52:53,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:52:53,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:53,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:52:53,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:52:53,348 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand 18 states. [2020-10-27 14:52:53,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:53,612 INFO L93 Difference]: Finished difference Result 159 states and 196 transitions. [2020-10-27 14:52:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:52:53,612 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 88 [2020-10-27 14:52:53,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:53,613 INFO L225 Difference]: With dead ends: 159 [2020-10-27 14:52:53,613 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 14:52:53,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:52:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 14:52:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2020-10-27 14:52:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-27 14:52:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2020-10-27 14:52:53,621 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 88 [2020-10-27 14:52:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:53,623 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2020-10-27 14:52:53,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:52:53,623 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2020-10-27 14:52:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 14:52:53,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:53,624 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:53,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:52:53,624 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2042691460, now seen corresponding path program 15 times [2020-10-27 14:52:53,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:53,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710373992] [2020-10-27 14:52:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:53,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:53,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:58,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:58,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 14:52:58,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:52:58,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 14:52:58,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:58,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:52:58,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:52:58,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 14:52:58,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:58,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:58,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:58,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:58,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:58,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:58,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:58,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:58,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:58,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:58,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:58,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-27 14:52:58,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710373992] [2020-10-27 14:52:58,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:58,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:52:58,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770576824] [2020-10-27 14:52:58,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:52:58,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:58,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:52:58,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:52:58,932 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 19 states. [2020-10-27 14:52:59,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:59,224 INFO L93 Difference]: Finished difference Result 167 states and 206 transitions. [2020-10-27 14:52:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:52:59,225 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 93 [2020-10-27 14:52:59,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:59,227 INFO L225 Difference]: With dead ends: 167 [2020-10-27 14:52:59,227 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 14:52:59,228 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 14:52:59,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 14:52:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-10-27 14:52:59,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 14:52:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2020-10-27 14:52:59,233 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 93 [2020-10-27 14:52:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:59,234 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2020-10-27 14:52:59,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:52:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2020-10-27 14:52:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 14:52:59,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:59,235 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:59,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:52:59,235 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:59,236 INFO L82 PathProgramCache]: Analyzing trace with hash 233555633, now seen corresponding path program 16 times [2020-10-27 14:52:59,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:59,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127944071] [2020-10-27 14:52:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:59,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:59,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:04,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:04,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 14:53:04,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:04,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:53:04,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:04,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:53:04,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:53:04,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:53:04,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:04,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:04,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:04,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:04,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:04,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:04,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:04,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:04,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:04,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:04,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:04,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-27 14:53:04,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127944071] [2020-10-27 14:53:04,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:04,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:53:04,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723149483] [2020-10-27 14:53:04,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:53:04,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:04,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:53:04,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:53:04,557 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand 20 states. [2020-10-27 14:53:04,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:04,900 INFO L93 Difference]: Finished difference Result 175 states and 216 transitions. [2020-10-27 14:53:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:53:04,900 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2020-10-27 14:53:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:04,903 INFO L225 Difference]: With dead ends: 175 [2020-10-27 14:53:04,903 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 14:53:04,904 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 14:53:04,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 14:53:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-10-27 14:53:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-27 14:53:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2020-10-27 14:53:04,916 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 98 [2020-10-27 14:53:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:04,917 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2020-10-27 14:53:04,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:53:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2020-10-27 14:53:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-27 14:53:04,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:04,919 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:04,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:53:04,919 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:04,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:04,920 INFO L82 PathProgramCache]: Analyzing trace with hash -887045928, now seen corresponding path program 17 times [2020-10-27 14:53:04,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:04,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215095038] [2020-10-27 14:53:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:04,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:05,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:09,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:09,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 14:53:09,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:09,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:53:09,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:53:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:53:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 14:53:09,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:10,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:10,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:10,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:10,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:10,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:10,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:10,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:10,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:10,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:10,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:10,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-27 14:53:10,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215095038] [2020-10-27 14:53:10,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:10,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:53:10,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932072699] [2020-10-27 14:53:10,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:53:10,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:10,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:53:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:53:10,237 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand 21 states. [2020-10-27 14:53:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:10,562 INFO L93 Difference]: Finished difference Result 183 states and 226 transitions. [2020-10-27 14:53:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:53:10,562 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-10-27 14:53:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:10,564 INFO L225 Difference]: With dead ends: 183 [2020-10-27 14:53:10,564 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:53:10,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:53:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:53:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2020-10-27 14:53:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 14:53:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 134 transitions. [2020-10-27 14:53:10,571 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 134 transitions. Word has length 103 [2020-10-27 14:53:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:10,571 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 134 transitions. [2020-10-27 14:53:10,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:53:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 134 transitions. [2020-10-27 14:53:10,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 14:53:10,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:10,572 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:10,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:53:10,573 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:10,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1999255979, now seen corresponding path program 18 times [2020-10-27 14:53:10,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:10,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688478441] [2020-10-27 14:53:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:10,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:10,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:15,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:15,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 14:53:15,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:15,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 14:53:15,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:15,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:53:15,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 14:53:15,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:53:15,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:15,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:15,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:15,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:15,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:15,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:15,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:53:15,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:15,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:15,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:15,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:15,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-27 14:53:15,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688478441] [2020-10-27 14:53:15,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:15,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:53:15,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986649043] [2020-10-27 14:53:15,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:53:15,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:15,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:53:15,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:53:15,919 INFO L87 Difference]: Start difference. First operand 113 states and 134 transitions. Second operand 22 states. [2020-10-27 14:53:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:16,290 INFO L93 Difference]: Finished difference Result 191 states and 236 transitions. [2020-10-27 14:53:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:53:16,291 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 108 [2020-10-27 14:53:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:16,292 INFO L225 Difference]: With dead ends: 191 [2020-10-27 14:53:16,293 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 14:53:16,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:53:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 14:53:16,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2020-10-27 14:53:16,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 14:53:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 140 transitions. [2020-10-27 14:53:16,303 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 140 transitions. Word has length 108 [2020-10-27 14:53:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:16,303 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 140 transitions. [2020-10-27 14:53:16,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:53:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 140 transitions. [2020-10-27 14:53:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 14:53:16,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:16,305 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:16,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:53:16,305 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:16,305 INFO L82 PathProgramCache]: Analyzing trace with hash 711684404, now seen corresponding path program 19 times [2020-10-27 14:53:16,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:16,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949767554] [2020-10-27 14:53:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:16,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:16,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:21,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:21,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-27 14:53:21,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:21,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 14:53:21,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:21,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:53:21,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:53:21,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:53:21,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:21,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:21,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:21,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:21,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:21,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:21,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:21,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:21,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:21,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:21,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:21,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-27 14:53:21,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949767554] [2020-10-27 14:53:21,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:21,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:53:21,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007426106] [2020-10-27 14:53:21,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:53:21,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:21,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:53:21,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:53:21,692 INFO L87 Difference]: Start difference. First operand 118 states and 140 transitions. Second operand 23 states. [2020-10-27 14:53:22,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:22,051 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2020-10-27 14:53:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:53:22,051 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 113 [2020-10-27 14:53:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:22,053 INFO L225 Difference]: With dead ends: 199 [2020-10-27 14:53:22,053 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:53:22,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:53:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:53:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-10-27 14:53:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 14:53:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2020-10-27 14:53:22,060 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 113 [2020-10-27 14:53:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:22,061 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2020-10-27 14:53:22,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:53:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2020-10-27 14:53:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-27 14:53:22,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:22,062 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:22,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:53:22,062 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:22,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:22,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1509558791, now seen corresponding path program 20 times [2020-10-27 14:53:22,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:22,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844726190] [2020-10-27 14:53:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:22,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:22,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:27,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:27,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 14:53:27,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:27,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-27 14:53:27,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:27,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:53:27,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:53:27,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:53:27,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:27,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:27,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:27,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:27,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:27,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:27,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:27,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:27,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:27,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:27,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:27,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-27 14:53:27,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844726190] [2020-10-27 14:53:27,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:27,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:53:27,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906236520] [2020-10-27 14:53:27,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:53:27,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:27,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:53:27,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:53:27,489 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand 24 states. [2020-10-27 14:53:27,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:27,852 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2020-10-27 14:53:27,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:53:27,853 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 118 [2020-10-27 14:53:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:27,854 INFO L225 Difference]: With dead ends: 207 [2020-10-27 14:53:27,854 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 14:53:27,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:53:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 14:53:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2020-10-27 14:53:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 14:53:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 152 transitions. [2020-10-27 14:53:27,861 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 152 transitions. Word has length 118 [2020-10-27 14:53:27,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:27,862 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 152 transitions. [2020-10-27 14:53:27,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:53:27,862 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 152 transitions. [2020-10-27 14:53:27,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 14:53:27,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:27,863 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:27,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:53:27,863 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:27,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash -148844144, now seen corresponding path program 21 times [2020-10-27 14:53:27,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:27,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018640210] [2020-10-27 14:53:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:27,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:27,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:32,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:32,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 14:53:32,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:32,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 14:53:32,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:53:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 14:53:32,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 14:53:32,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:33,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:33,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:33,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:33,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:33,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:33,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:33,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:33,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:33,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:33,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:33,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-27 14:53:33,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018640210] [2020-10-27 14:53:33,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:33,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:53:33,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766852249] [2020-10-27 14:53:33,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:53:33,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:33,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:53:33,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:53:33,337 INFO L87 Difference]: Start difference. First operand 128 states and 152 transitions. Second operand 25 states. [2020-10-27 14:53:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:33,659 INFO L93 Difference]: Finished difference Result 215 states and 266 transitions. [2020-10-27 14:53:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:53:33,660 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 123 [2020-10-27 14:53:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:33,661 INFO L225 Difference]: With dead ends: 215 [2020-10-27 14:53:33,661 INFO L226 Difference]: Without dead ends: 136 [2020-10-27 14:53:33,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:53:33,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-27 14:53:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2020-10-27 14:53:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 14:53:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 158 transitions. [2020-10-27 14:53:33,669 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 158 transitions. Word has length 123 [2020-10-27 14:53:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:33,669 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 158 transitions. [2020-10-27 14:53:33,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:53:33,669 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 158 transitions. [2020-10-27 14:53:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 14:53:33,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:33,671 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:33,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:53:33,671 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:33,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:33,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1640327779, now seen corresponding path program 22 times [2020-10-27 14:53:33,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:33,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161142672] [2020-10-27 14:53:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:33,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:33,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:38,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:38,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 14:53:38,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:38,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5106 [2020-10-27 14:53:38,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:38,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:53:38,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 14:53:38,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:53:38,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:39,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:39,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:39,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:39,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:39,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:39,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:39,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:39,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:39,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-27 14:53:39,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161142672] [2020-10-27 14:53:39,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:39,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:53:39,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40445498] [2020-10-27 14:53:39,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:53:39,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:39,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:53:39,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:53:39,244 INFO L87 Difference]: Start difference. First operand 133 states and 158 transitions. Second operand 26 states. [2020-10-27 14:53:39,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:39,581 INFO L93 Difference]: Finished difference Result 223 states and 276 transitions. [2020-10-27 14:53:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:53:39,581 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 128 [2020-10-27 14:53:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:39,583 INFO L225 Difference]: With dead ends: 223 [2020-10-27 14:53:39,583 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 14:53:39,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:53:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 14:53:39,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2020-10-27 14:53:39,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-27 14:53:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 164 transitions. [2020-10-27 14:53:39,590 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 164 transitions. Word has length 128 [2020-10-27 14:53:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:39,590 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 164 transitions. [2020-10-27 14:53:39,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:53:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 164 transitions. [2020-10-27 14:53:39,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 14:53:39,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:39,591 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:39,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:53:39,592 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:39,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:39,592 INFO L82 PathProgramCache]: Analyzing trace with hash 599957996, now seen corresponding path program 23 times [2020-10-27 14:53:39,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:39,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621791091] [2020-10-27 14:53:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:39,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:42,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:44,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:44,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 14:53:44,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:44,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-27 14:53:44,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:44,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:53:44,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 14:53:44,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 14:53:44,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:45,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:45,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:45,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:45,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:45,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:45,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:45,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:45,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:45,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:45,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:45,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-27 14:53:45,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621791091] [2020-10-27 14:53:45,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:45,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:53:45,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874503930] [2020-10-27 14:53:45,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:53:45,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:53:45,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:53:45,145 INFO L87 Difference]: Start difference. First operand 138 states and 164 transitions. Second operand 27 states. [2020-10-27 14:53:45,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:45,578 INFO L93 Difference]: Finished difference Result 231 states and 286 transitions. [2020-10-27 14:53:45,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:53:45,579 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 133 [2020-10-27 14:53:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:45,580 INFO L225 Difference]: With dead ends: 231 [2020-10-27 14:53:45,580 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 14:53:45,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:53:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 14:53:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-10-27 14:53:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 14:53:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2020-10-27 14:53:45,588 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 133 [2020-10-27 14:53:45,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:45,589 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2020-10-27 14:53:45,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:53:45,589 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2020-10-27 14:53:45,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 14:53:45,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:45,590 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:45,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:53:45,590 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:45,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:45,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1666063039, now seen corresponding path program 24 times [2020-10-27 14:53:45,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:45,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961720723] [2020-10-27 14:53:45,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:45,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:45,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:50,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:50,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 14:53:50,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:50,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5175 [2020-10-27 14:53:50,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:50,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:53:50,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:53:50,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 14:53:50,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:51,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:51,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:51,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:51,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:51,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:51,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:51,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:51,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:51,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-27 14:53:51,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961720723] [2020-10-27 14:53:51,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:51,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:53:51,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264517461] [2020-10-27 14:53:51,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:53:51,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:51,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:53:51,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:53:51,271 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand 28 states. [2020-10-27 14:53:51,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:51,707 INFO L93 Difference]: Finished difference Result 239 states and 296 transitions. [2020-10-27 14:53:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:53:51,707 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 138 [2020-10-27 14:53:51,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:51,709 INFO L225 Difference]: With dead ends: 239 [2020-10-27 14:53:51,709 INFO L226 Difference]: Without dead ends: 151 [2020-10-27 14:53:51,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:53:51,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-27 14:53:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2020-10-27 14:53:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-27 14:53:51,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 176 transitions. [2020-10-27 14:53:51,727 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 176 transitions. Word has length 138 [2020-10-27 14:53:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:51,727 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 176 transitions. [2020-10-27 14:53:51,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:53:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 176 transitions. [2020-10-27 14:53:51,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 14:53:51,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:51,729 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:51,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:53:51,729 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:51,730 INFO L82 PathProgramCache]: Analyzing trace with hash 508731976, now seen corresponding path program 25 times [2020-10-27 14:53:51,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:51,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521941964] [2020-10-27 14:53:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:51,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:55,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:56,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:56,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 14:53:56,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:53:56,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:53:56,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:56,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:53:56,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 14:53:56,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 14:53:56,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:57,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:57,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:57,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:57,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:57,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:57,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:57,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:57,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:57,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:57,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:57,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-27 14:53:57,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521941964] [2020-10-27 14:53:57,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:57,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:53:57,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457521745] [2020-10-27 14:53:57,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:53:57,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:57,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:53:57,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:53:57,279 INFO L87 Difference]: Start difference. First operand 148 states and 176 transitions. Second operand 29 states. [2020-10-27 14:53:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:57,764 INFO L93 Difference]: Finished difference Result 247 states and 306 transitions. [2020-10-27 14:53:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:53:57,765 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 143 [2020-10-27 14:53:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:57,766 INFO L225 Difference]: With dead ends: 247 [2020-10-27 14:53:57,766 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 14:53:57,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:53:57,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 14:53:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-10-27 14:53:57,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 14:53:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2020-10-27 14:53:57,775 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 143 [2020-10-27 14:53:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:57,775 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2020-10-27 14:53:57,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:53:57,775 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2020-10-27 14:53:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-27 14:53:57,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:57,777 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:57,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:53:57,777 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:57,777 INFO L82 PathProgramCache]: Analyzing trace with hash -483777307, now seen corresponding path program 26 times [2020-10-27 14:53:57,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:57,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464150251] [2020-10-27 14:53:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:57,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:02,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:02,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:02,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-27 14:54:02,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:02,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 14:54:02,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:54:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 14:54:02,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 14:54:02,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:03,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:03,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:03,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:03,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:03,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:03,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:54:03,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:03,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:03,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:03,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:03,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-27 14:54:03,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464150251] [2020-10-27 14:54:03,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:03,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:54:03,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807275686] [2020-10-27 14:54:03,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:54:03,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:03,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:54:03,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:54:03,410 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand 30 states. [2020-10-27 14:54:03,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:03,919 INFO L93 Difference]: Finished difference Result 255 states and 316 transitions. [2020-10-27 14:54:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:54:03,920 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 148 [2020-10-27 14:54:03,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:03,921 INFO L225 Difference]: With dead ends: 255 [2020-10-27 14:54:03,921 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 14:54:03,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:54:03,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 14:54:03,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2020-10-27 14:54:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-27 14:54:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2020-10-27 14:54:03,931 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 148 [2020-10-27 14:54:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:03,932 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2020-10-27 14:54:03,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:54:03,932 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2020-10-27 14:54:03,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 14:54:03,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:03,933 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:03,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:54:03,933 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:03,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1403874652, now seen corresponding path program 27 times [2020-10-27 14:54:03,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:03,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763505220] [2020-10-27 14:54:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:03,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:08,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:08,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 14:54:08,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:08,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 14:54:08,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:08,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:54:08,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:54:08,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:54:08,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:09,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:09,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:09,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:09,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:09,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:09,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:09,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:09,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:09,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:09,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:09,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-27 14:54:09,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763505220] [2020-10-27 14:54:09,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:09,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:54:09,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701000529] [2020-10-27 14:54:09,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:54:09,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:09,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:54:09,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:54:09,649 INFO L87 Difference]: Start difference. First operand 158 states and 188 transitions. Second operand 31 states. [2020-10-27 14:54:10,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:10,112 INFO L93 Difference]: Finished difference Result 263 states and 326 transitions. [2020-10-27 14:54:10,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:54:10,112 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 153 [2020-10-27 14:54:10,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:10,114 INFO L225 Difference]: With dead ends: 263 [2020-10-27 14:54:10,114 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 14:54:10,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:54:10,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 14:54:10,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2020-10-27 14:54:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 14:54:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 194 transitions. [2020-10-27 14:54:10,124 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 194 transitions. Word has length 153 [2020-10-27 14:54:10,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:10,124 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 194 transitions. [2020-10-27 14:54:10,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:54:10,124 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 194 transitions. [2020-10-27 14:54:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 14:54:10,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:10,125 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:10,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:54:10,125 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:10,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:10,126 INFO L82 PathProgramCache]: Analyzing trace with hash -303983479, now seen corresponding path program 28 times [2020-10-27 14:54:10,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:10,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423383672] [2020-10-27 14:54:10,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:10,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:15,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:15,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-27 14:54:15,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:15,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-27 14:54:15,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:15,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:54:15,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:54:15,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:54:15,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:15,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:15,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:15,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:15,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:15,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:15,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:15,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:15,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:15,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:15,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:15,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-27 14:54:15,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423383672] [2020-10-27 14:54:15,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:15,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:54:15,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95890518] [2020-10-27 14:54:15,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:54:15,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:15,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:54:15,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:54:15,840 INFO L87 Difference]: Start difference. First operand 163 states and 194 transitions. Second operand 32 states. [2020-10-27 14:54:16,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:16,263 INFO L93 Difference]: Finished difference Result 271 states and 336 transitions. [2020-10-27 14:54:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:54:16,264 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 158 [2020-10-27 14:54:16,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:16,265 INFO L225 Difference]: With dead ends: 271 [2020-10-27 14:54:16,265 INFO L226 Difference]: Without dead ends: 171 [2020-10-27 14:54:16,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:54:16,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-27 14:54:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2020-10-27 14:54:16,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-27 14:54:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 200 transitions. [2020-10-27 14:54:16,273 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 200 transitions. Word has length 158 [2020-10-27 14:54:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:16,273 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 200 transitions. [2020-10-27 14:54:16,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:54:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 200 transitions. [2020-10-27 14:54:16,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 14:54:16,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:16,275 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:16,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:54:16,275 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:16,276 INFO L82 PathProgramCache]: Analyzing trace with hash -960220416, now seen corresponding path program 29 times [2020-10-27 14:54:16,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:16,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596097687] [2020-10-27 14:54:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:16,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:21,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:21,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 14:54:21,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:21,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-27 14:54:21,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:21,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:54:21,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:54:21,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:54:21,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:22,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:22,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:22,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:22,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:22,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:22,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:22,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:22,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:22,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:22,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:22,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-27 14:54:22,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596097687] [2020-10-27 14:54:22,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:22,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:54:22,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441845474] [2020-10-27 14:54:22,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:54:22,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:22,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:54:22,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:54:22,067 INFO L87 Difference]: Start difference. First operand 168 states and 200 transitions. Second operand 33 states. [2020-10-27 14:54:22,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:22,518 INFO L93 Difference]: Finished difference Result 279 states and 346 transitions. [2020-10-27 14:54:22,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:54:22,519 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 163 [2020-10-27 14:54:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:22,521 INFO L225 Difference]: With dead ends: 279 [2020-10-27 14:54:22,521 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 14:54:22,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:54:22,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 14:54:22,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2020-10-27 14:54:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-27 14:54:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 206 transitions. [2020-10-27 14:54:22,544 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 206 transitions. Word has length 163 [2020-10-27 14:54:22,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:22,545 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 206 transitions. [2020-10-27 14:54:22,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:54:22,545 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 206 transitions. [2020-10-27 14:54:22,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 14:54:22,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:22,547 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:22,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:54:22,547 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:22,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1751747539, now seen corresponding path program 30 times [2020-10-27 14:54:22,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:22,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888859999] [2020-10-27 14:54:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:22,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:27,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:27,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 14:54:27,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5177 [2020-10-27 14:54:27,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:54:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:54:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:54:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:28,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:28,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:28,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:28,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:28,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:28,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:28,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:28,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:28,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:28,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-27 14:54:28,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888859999] [2020-10-27 14:54:28,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:28,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:54:28,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797658955] [2020-10-27 14:54:28,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:54:28,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:28,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:54:28,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:54:28,468 INFO L87 Difference]: Start difference. First operand 173 states and 206 transitions. Second operand 34 states. [2020-10-27 14:54:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:29,062 INFO L93 Difference]: Finished difference Result 287 states and 356 transitions. [2020-10-27 14:54:29,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:54:29,062 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 168 [2020-10-27 14:54:29,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:29,065 INFO L225 Difference]: With dead ends: 287 [2020-10-27 14:54:29,065 INFO L226 Difference]: Without dead ends: 181 [2020-10-27 14:54:29,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:54:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-27 14:54:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2020-10-27 14:54:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-27 14:54:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 212 transitions. [2020-10-27 14:54:29,073 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 212 transitions. Word has length 168 [2020-10-27 14:54:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:29,073 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 212 transitions. [2020-10-27 14:54:29,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:54:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 212 transitions. [2020-10-27 14:54:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 14:54:29,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:29,075 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:29,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:54:29,075 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:29,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1982415708, now seen corresponding path program 31 times [2020-10-27 14:54:29,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:29,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375450368] [2020-10-27 14:54:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:29,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:34,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:34,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 14:54:34,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:34,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5144 [2020-10-27 14:54:34,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:34,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:54:34,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:54:34,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 14:54:34,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:34,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:34,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:34,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:34,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:34,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:34,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:34,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:34,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:34,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:34,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:34,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-10-27 14:54:34,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375450368] [2020-10-27 14:54:34,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:34,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:54:34,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624901299] [2020-10-27 14:54:34,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:54:34,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:34,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:54:34,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:54:34,987 INFO L87 Difference]: Start difference. First operand 178 states and 212 transitions. Second operand 35 states. [2020-10-27 14:54:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:35,518 INFO L93 Difference]: Finished difference Result 295 states and 366 transitions. [2020-10-27 14:54:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:54:35,519 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 173 [2020-10-27 14:54:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:35,521 INFO L225 Difference]: With dead ends: 295 [2020-10-27 14:54:35,521 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 14:54:35,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:54:35,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 14:54:35,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2020-10-27 14:54:35,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-27 14:54:35,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 218 transitions. [2020-10-27 14:54:35,529 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 218 transitions. Word has length 173 [2020-10-27 14:54:35,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:35,530 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 218 transitions. [2020-10-27 14:54:35,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:54:35,530 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 218 transitions. [2020-10-27 14:54:35,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-27 14:54:35,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:35,531 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:35,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:54:35,532 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:35,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:35,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1032258513, now seen corresponding path program 32 times [2020-10-27 14:54:35,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:35,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665893912] [2020-10-27 14:54:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:35,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:35,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:40,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:40,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-27 14:54:40,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:40,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-27 14:54:40,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:40,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:54:40,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-27 14:54:40,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 14:54:40,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:41,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:41,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:41,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:41,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:41,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:41,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:41,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:41,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:41,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:41,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:41,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-27 14:54:41,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665893912] [2020-10-27 14:54:41,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:41,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:54:41,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072336591] [2020-10-27 14:54:41,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:54:41,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:41,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:54:41,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:54:41,402 INFO L87 Difference]: Start difference. First operand 183 states and 218 transitions. Second operand 36 states. [2020-10-27 14:54:41,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:41,930 INFO L93 Difference]: Finished difference Result 303 states and 376 transitions. [2020-10-27 14:54:41,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:54:41,931 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 178 [2020-10-27 14:54:41,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:41,932 INFO L225 Difference]: With dead ends: 303 [2020-10-27 14:54:41,932 INFO L226 Difference]: Without dead ends: 191 [2020-10-27 14:54:41,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:54:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-27 14:54:41,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2020-10-27 14:54:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-27 14:54:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 224 transitions. [2020-10-27 14:54:41,940 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 224 transitions. Word has length 178 [2020-10-27 14:54:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:41,941 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 224 transitions. [2020-10-27 14:54:41,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:54:41,941 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 224 transitions. [2020-10-27 14:54:41,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-27 14:54:41,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:41,942 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:41,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:54:41,943 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:41,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:41,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1367112776, now seen corresponding path program 33 times [2020-10-27 14:54:41,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:41,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956521965] [2020-10-27 14:54:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:42,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:42,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:47,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:47,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 14:54:47,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:47,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5213 [2020-10-27 14:54:47,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:47,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:54:47,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 14:54:47,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 14:54:47,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:48,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:48,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:48,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:48,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:48,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:48,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:48,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:48,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:48,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:48,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:48,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-27 14:54:48,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956521965] [2020-10-27 14:54:48,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:48,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:54:48,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691334606] [2020-10-27 14:54:48,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:54:48,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:48,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:54:48,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:54:48,087 INFO L87 Difference]: Start difference. First operand 188 states and 224 transitions. Second operand 37 states. [2020-10-27 14:54:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:48,719 INFO L93 Difference]: Finished difference Result 311 states and 386 transitions. [2020-10-27 14:54:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:54:48,719 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 183 [2020-10-27 14:54:48,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:48,721 INFO L225 Difference]: With dead ends: 311 [2020-10-27 14:54:48,721 INFO L226 Difference]: Without dead ends: 196 [2020-10-27 14:54:48,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:54:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-27 14:54:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2020-10-27 14:54:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-27 14:54:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 230 transitions. [2020-10-27 14:54:48,729 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 230 transitions. Word has length 183 [2020-10-27 14:54:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:48,729 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 230 transitions. [2020-10-27 14:54:48,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:54:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 230 transitions. [2020-10-27 14:54:48,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-27 14:54:48,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:48,731 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:48,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:54:48,731 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:48,732 INFO L82 PathProgramCache]: Analyzing trace with hash -479100043, now seen corresponding path program 34 times [2020-10-27 14:54:48,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:48,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047128639] [2020-10-27 14:54:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:48,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:48,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:54,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:54,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-27 14:54:54,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:54,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5222 [2020-10-27 14:54:54,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:54,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:54:54,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 14:54:54,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 14:54:54,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:54,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:54,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:54,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:54,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:54,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:54,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:54,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:54,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:54,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:54,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:54,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-27 14:54:54,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047128639] [2020-10-27 14:54:54,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:54,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:54:54,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433704879] [2020-10-27 14:54:54,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:54:54,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:54,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:54:54,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:54:54,867 INFO L87 Difference]: Start difference. First operand 193 states and 230 transitions. Second operand 38 states. [2020-10-27 14:54:55,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:55,392 INFO L93 Difference]: Finished difference Result 319 states and 396 transitions. [2020-10-27 14:54:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:54:55,392 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 188 [2020-10-27 14:54:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:55,394 INFO L225 Difference]: With dead ends: 319 [2020-10-27 14:54:55,394 INFO L226 Difference]: Without dead ends: 201 [2020-10-27 14:54:55,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:54:55,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-27 14:54:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-10-27 14:54:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-27 14:54:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 236 transitions. [2020-10-27 14:54:55,403 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 236 transitions. Word has length 188 [2020-10-27 14:54:55,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:55,403 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 236 transitions. [2020-10-27 14:54:55,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:54:55,404 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 236 transitions. [2020-10-27 14:54:55,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-27 14:54:55,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:55,405 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:55,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:54:55,406 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:55,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:55,406 INFO L82 PathProgramCache]: Analyzing trace with hash 726971412, now seen corresponding path program 35 times [2020-10-27 14:54:55,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:55,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318591123] [2020-10-27 14:54:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:55,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:00,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:00,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-27 14:55:00,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:00,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5383 [2020-10-27 14:55:00,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:00,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:55:00,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:55:00,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 14:55:00,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:01,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:01,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:01,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:01,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:01,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:01,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:55:01,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:01,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:01,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:01,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:01,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-10-27 14:55:01,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318591123] [2020-10-27 14:55:01,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:01,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:55:01,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690619376] [2020-10-27 14:55:01,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:55:01,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:01,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:55:01,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:55:01,792 INFO L87 Difference]: Start difference. First operand 198 states and 236 transitions. Second operand 39 states. [2020-10-27 14:55:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:02,287 INFO L93 Difference]: Finished difference Result 327 states and 406 transitions. [2020-10-27 14:55:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:55:02,287 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 193 [2020-10-27 14:55:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:02,290 INFO L225 Difference]: With dead ends: 327 [2020-10-27 14:55:02,290 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 14:55:02,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:55:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 14:55:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2020-10-27 14:55:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-27 14:55:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 242 transitions. [2020-10-27 14:55:02,299 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 242 transitions. Word has length 193 [2020-10-27 14:55:02,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:02,299 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 242 transitions. [2020-10-27 14:55:02,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:55:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 242 transitions. [2020-10-27 14:55:02,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-27 14:55:02,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:02,301 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:02,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:55:02,301 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1469330201, now seen corresponding path program 36 times [2020-10-27 14:55:02,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:02,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722543524] [2020-10-27 14:55:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:02,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:07,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:07,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-27 14:55:07,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:07,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5283 [2020-10-27 14:55:07,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:07,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:55:07,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:55:07,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 14:55:07,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:08,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:08,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:08,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:08,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:08,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:08,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:08,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:08,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:08,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:08,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:08,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-10-27 14:55:08,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722543524] [2020-10-27 14:55:08,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:08,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:55:08,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968961706] [2020-10-27 14:55:08,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:55:08,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:08,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:55:08,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:55:08,574 INFO L87 Difference]: Start difference. First operand 203 states and 242 transitions. Second operand 40 states. [2020-10-27 14:55:09,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:09,157 INFO L93 Difference]: Finished difference Result 335 states and 416 transitions. [2020-10-27 14:55:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:55:09,158 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 198 [2020-10-27 14:55:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:09,160 INFO L225 Difference]: With dead ends: 335 [2020-10-27 14:55:09,161 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 14:55:09,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:55:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 14:55:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-10-27 14:55:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-27 14:55:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 248 transitions. [2020-10-27 14:55:09,169 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 248 transitions. Word has length 198 [2020-10-27 14:55:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:09,170 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 248 transitions. [2020-10-27 14:55:09,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:55:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 248 transitions. [2020-10-27 14:55:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-27 14:55:09,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:09,171 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:09,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:55:09,171 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:09,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1268683888, now seen corresponding path program 37 times [2020-10-27 14:55:09,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:09,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945387974] [2020-10-27 14:55:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:09,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:09,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:14,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:14,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-27 14:55:14,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:55:14,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5288 [2020-10-27 14:55:14,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:14,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 14:55:14,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 14:55:14,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 14:55:14,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:15,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:15,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:15,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:15,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:15,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:15,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:15,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:15,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:15,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:15,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:15,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-27 14:55:15,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945387974] [2020-10-27 14:55:15,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:15,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 14:55:15,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928288710] [2020-10-27 14:55:15,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 14:55:15,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:15,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 14:55:15,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:55:15,628 INFO L87 Difference]: Start difference. First operand 208 states and 248 transitions. Second operand 41 states. [2020-10-27 14:55:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:16,374 INFO L93 Difference]: Finished difference Result 343 states and 426 transitions. [2020-10-27 14:55:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:55:16,375 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 203 [2020-10-27 14:55:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:16,377 INFO L225 Difference]: With dead ends: 343 [2020-10-27 14:55:16,377 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 14:55:16,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:55:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 14:55:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2020-10-27 14:55:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-27 14:55:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 254 transitions. [2020-10-27 14:55:16,386 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 254 transitions. Word has length 203 [2020-10-27 14:55:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:16,386 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 254 transitions. [2020-10-27 14:55:16,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 14:55:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 254 transitions. [2020-10-27 14:55:16,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-27 14:55:16,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:16,388 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:16,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:55:16,388 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:16,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:16,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1454199485, now seen corresponding path program 38 times [2020-10-27 14:55:16,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:16,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533219631] [2020-10-27 14:55:16,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:16,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:21,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:21,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-27 14:55:21,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:21,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5217 [2020-10-27 14:55:21,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:21,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 14:55:21,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:55:21,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 14:55:21,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:22,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:22,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:22,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:22,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:22,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:22,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:55:22,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:22,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:22,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:22,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:22,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-10-27 14:55:22,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533219631] [2020-10-27 14:55:22,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:22,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 14:55:22,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753626373] [2020-10-27 14:55:22,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 14:55:22,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:22,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 14:55:22,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:55:22,728 INFO L87 Difference]: Start difference. First operand 213 states and 254 transitions. Second operand 42 states. [2020-10-27 14:55:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:23,455 INFO L93 Difference]: Finished difference Result 351 states and 436 transitions. [2020-10-27 14:55:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 14:55:23,455 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 208 [2020-10-27 14:55:23,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:23,457 INFO L225 Difference]: With dead ends: 351 [2020-10-27 14:55:23,457 INFO L226 Difference]: Without dead ends: 221 [2020-10-27 14:55:23,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 14:55:23,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-27 14:55:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2020-10-27 14:55:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-27 14:55:23,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 260 transitions. [2020-10-27 14:55:23,466 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 260 transitions. Word has length 208 [2020-10-27 14:55:23,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:23,466 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 260 transitions. [2020-10-27 14:55:23,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 14:55:23,467 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 260 transitions. [2020-10-27 14:55:23,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-27 14:55:23,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:23,468 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:23,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 14:55:23,468 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:23,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:23,469 INFO L82 PathProgramCache]: Analyzing trace with hash -303897396, now seen corresponding path program 39 times [2020-10-27 14:55:23,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:23,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62929724] [2020-10-27 14:55:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:23,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:28,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:28,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-27 14:55:28,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:28,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5434 [2020-10-27 14:55:28,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:28,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 14:55:28,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:55:28,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 14:55:28,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:30,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:30,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:30,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:30,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:30,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:30,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:30,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:30,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:30,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:30,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:30,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2020-10-27 14:55:30,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62929724] [2020-10-27 14:55:30,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:30,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 14:55:30,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053183287] [2020-10-27 14:55:30,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 14:55:30,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:30,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 14:55:30,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:55:30,066 INFO L87 Difference]: Start difference. First operand 218 states and 260 transitions. Second operand 43 states. [2020-10-27 14:55:30,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:30,808 INFO L93 Difference]: Finished difference Result 359 states and 446 transitions. [2020-10-27 14:55:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 14:55:30,809 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 213 [2020-10-27 14:55:30,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:30,811 INFO L225 Difference]: With dead ends: 359 [2020-10-27 14:55:30,811 INFO L226 Difference]: Without dead ends: 226 [2020-10-27 14:55:30,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:55:30,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-27 14:55:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2020-10-27 14:55:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-27 14:55:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2020-10-27 14:55:30,821 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 213 [2020-10-27 14:55:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:30,822 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2020-10-27 14:55:30,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 14:55:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2020-10-27 14:55:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-27 14:55:30,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:30,823 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:30,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 14:55:30,824 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:30,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:30,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1342496159, now seen corresponding path program 40 times [2020-10-27 14:55:30,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:30,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494591327] [2020-10-27 14:55:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:30,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:36,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:36,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-27 14:55:36,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:36,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5567 [2020-10-27 14:55:36,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 14:55:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 14:55:36,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 14:55:36,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:37,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:37,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:37,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:37,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:37,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:37,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:37,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:37,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:37,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-10-27 14:55:37,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494591327] [2020-10-27 14:55:37,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:37,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 14:55:37,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551062232] [2020-10-27 14:55:37,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 14:55:37,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:37,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 14:55:37,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:55:37,602 INFO L87 Difference]: Start difference. First operand 223 states and 266 transitions. Second operand 44 states. [2020-10-27 14:55:38,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:38,403 INFO L93 Difference]: Finished difference Result 367 states and 456 transitions. [2020-10-27 14:55:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 14:55:38,404 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 218 [2020-10-27 14:55:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:38,406 INFO L225 Difference]: With dead ends: 367 [2020-10-27 14:55:38,406 INFO L226 Difference]: Without dead ends: 231 [2020-10-27 14:55:38,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 14:55:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-27 14:55:38,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2020-10-27 14:55:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-27 14:55:38,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 272 transitions. [2020-10-27 14:55:38,415 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 272 transitions. Word has length 218 [2020-10-27 14:55:38,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:38,415 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 272 transitions. [2020-10-27 14:55:38,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 14:55:38,415 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 272 transitions. [2020-10-27 14:55:38,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-27 14:55:38,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:38,417 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:38,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 14:55:38,417 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:38,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:38,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1277388072, now seen corresponding path program 41 times [2020-10-27 14:55:38,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:38,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018902052] [2020-10-27 14:55:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:38,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:38,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking...