/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/locks/test_locks_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:09:15,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:09:15,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:09:15,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:09:15,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:09:15,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:09:15,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:09:15,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:09:15,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:09:15,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:09:15,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:09:15,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:09:15,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:09:15,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:09:15,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:09:15,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:09:15,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:09:15,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:09:15,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:09:15,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:09:15,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:09:15,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:09:15,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:09:15,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:09:15,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:09:15,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:09:15,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:09:15,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:09:15,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:09:15,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:09:15,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:09:15,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:09:15,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:09:15,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:09:15,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:09:15,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:09:15,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:09:15,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:09:15,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:09:15,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:09:15,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:09:15,184 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 20:09:15,240 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:09:15,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:09:15,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:09:15,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:09:15,243 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:09:15,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:09:15,243 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:09:15,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:09:15,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:09:15,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:09:15,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:09:15,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:09:15,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:09:15,246 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:09:15,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:09:15,247 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:09:15,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:09:15,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:09:15,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:09:15,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:09:15,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:09:15,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:09:15,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:09:15,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:09:15,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:09:15,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:09:15,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:09:15,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:09:15,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:09:15,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:09:15,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:09:15,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:09:15,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:09:15,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:09:15,725 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:09:15,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_12.c [2020-10-27 20:09:15,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8448127ff/a1e809dc7daa492ba426d0ee5b5542f0/FLAG1e0de0a40 [2020-10-27 20:09:16,493 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:09:16,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_12.c [2020-10-27 20:09:16,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8448127ff/a1e809dc7daa492ba426d0ee5b5542f0/FLAG1e0de0a40 [2020-10-27 20:09:16,824 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8448127ff/a1e809dc7daa492ba426d0ee5b5542f0 [2020-10-27 20:09:16,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:09:16,835 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:09:16,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:09:16,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:09:16,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:09:16,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:09:16" (1/1) ... [2020-10-27 20:09:16,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f587afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:16, skipping insertion in model container [2020-10-27 20:09:16,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:09:16" (1/1) ... [2020-10-27 20:09:16,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:09:16,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:09:17,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:09:17,073 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:09:17,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:09:17,122 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:09:17,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:17 WrapperNode [2020-10-27 20:09:17,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:09:17,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:09:17,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:09:17,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:09:17,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:17" (1/1) ... [2020-10-27 20:09:17,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:17" (1/1) ... [2020-10-27 20:09:17,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:17" (1/1) ... [2020-10-27 20:09:17,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:17" (1/1) ... [2020-10-27 20:09:17,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:17" (1/1) ... [2020-10-27 20:09:17,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:17" (1/1) ... [2020-10-27 20:09:17,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:17" (1/1) ... [2020-10-27 20:09:17,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:09:17,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:09:17,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:09:17,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:09:17,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:17" (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 20:09:17,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:09:17,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:09:17,293 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:09:17,293 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:09:17,293 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:09:17,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:09:17,294 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:09:17,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:09:17,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:09:17,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:09:17,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:09:17,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:09:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:09:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:09:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:09:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:09:17,935 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:09:17,935 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:09:17,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:09:17 BoogieIcfgContainer [2020-10-27 20:09:17,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:09:17,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:09:17,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:09:17,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:09:17,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:09:16" (1/3) ... [2020-10-27 20:09:17,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@489171c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:09:17, skipping insertion in model container [2020-10-27 20:09:17,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:09:17" (2/3) ... [2020-10-27 20:09:17,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@489171c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:09:17, skipping insertion in model container [2020-10-27 20:09:17,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:09:17" (3/3) ... [2020-10-27 20:09:17,951 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2020-10-27 20:09:17,964 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:09:17,971 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:09:17,988 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:09:18,030 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:09:18,030 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:09:18,031 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:09:18,031 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:09:18,031 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:09:18,031 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:09:18,031 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:09:18,031 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:09:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-10-27 20:09:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:09:18,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:18,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:18,072 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:18,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:18,082 INFO L82 PathProgramCache]: Analyzing trace with hash 384689759, now seen corresponding path program 1 times [2020-10-27 20:09:18,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:18,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542056624] [2020-10-27 20:09:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:18,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:18,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:18,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:09:18,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:18,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-27 20:09:18,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:18,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:18,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:09:18,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:18,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:09:18,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:18,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:18,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:18,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:18,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:18,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 20:09:18,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:18,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:18,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:18,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:18,773 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 20:09:18,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542056624] [2020-10-27 20:09:18,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:18,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:18,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64338629] [2020-10-27 20:09:18,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:18,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:18,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:18,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:18,800 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 4 states. [2020-10-27 20:09:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:19,233 INFO L93 Difference]: Finished difference Result 104 states and 181 transitions. [2020-10-27 20:09:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:19,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 20:09:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:19,247 INFO L225 Difference]: With dead ends: 104 [2020-10-27 20:09:19,248 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:09:19,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:19,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:09:19,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2020-10-27 20:09:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 20:09:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 107 transitions. [2020-10-27 20:09:19,306 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 107 transitions. Word has length 24 [2020-10-27 20:09:19,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:19,307 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 107 transitions. [2020-10-27 20:09:19,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 107 transitions. [2020-10-27 20:09:19,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:09:19,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:19,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:19,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:09:19,309 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:19,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:19,310 INFO L82 PathProgramCache]: Analyzing trace with hash -636378595, now seen corresponding path program 1 times [2020-10-27 20:09:19,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:19,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724751946] [2020-10-27 20:09:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:19,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:19,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:19,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:09:19,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:19,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 20:09:19,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:19,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:19,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:09:19,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:19,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:19,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:19,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:19,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:19,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:19,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:19,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:09:19,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:19,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:19,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:19,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:19,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:19,524 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 20:09:19,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724751946] [2020-10-27 20:09:19,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:19,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:19,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108742111] [2020-10-27 20:09:19,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:19,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:19,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:19,529 INFO L87 Difference]: Start difference. First operand 60 states and 107 transitions. Second operand 4 states. [2020-10-27 20:09:19,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:19,730 INFO L93 Difference]: Finished difference Result 139 states and 255 transitions. [2020-10-27 20:09:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:19,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 20:09:19,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:19,733 INFO L225 Difference]: With dead ends: 139 [2020-10-27 20:09:19,734 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 20:09:19,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 20:09:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-27 20:09:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 20:09:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 151 transitions. [2020-10-27 20:09:19,752 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 151 transitions. Word has length 24 [2020-10-27 20:09:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:19,753 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 151 transitions. [2020-10-27 20:09:19,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 151 transitions. [2020-10-27 20:09:19,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:09:19,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:19,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:19,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:09:19,755 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:19,756 INFO L82 PathProgramCache]: Analyzing trace with hash -952931053, now seen corresponding path program 1 times [2020-10-27 20:09:19,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:19,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324147333] [2020-10-27 20:09:19,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:19,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:19,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:19,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:19,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:09:19,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:09:19,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 20:09:19,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:19,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:19,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:09:19,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:19,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:09:19,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:20,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:20,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:20,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:20,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:20,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:09:20,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:20,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:20,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:20,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:20,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:20,012 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 20:09:20,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324147333] [2020-10-27 20:09:20,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:20,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:20,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060972965] [2020-10-27 20:09:20,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:20,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:20,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:20,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:20,015 INFO L87 Difference]: Start difference. First operand 84 states and 151 transitions. Second operand 4 states. [2020-10-27 20:09:20,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:20,200 INFO L93 Difference]: Finished difference Result 236 states and 436 transitions. [2020-10-27 20:09:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:20,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 20:09:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:20,203 INFO L225 Difference]: With dead ends: 236 [2020-10-27 20:09:20,203 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 20:09:20,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:20,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 20:09:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-27 20:09:20,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 20:09:20,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 286 transitions. [2020-10-27 20:09:20,221 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 286 transitions. Word has length 25 [2020-10-27 20:09:20,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:20,222 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 286 transitions. [2020-10-27 20:09:20,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 286 transitions. [2020-10-27 20:09:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:09:20,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:20,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:20,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:09:20,224 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:20,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:20,225 INFO L82 PathProgramCache]: Analyzing trace with hash 68137301, now seen corresponding path program 1 times [2020-10-27 20:09:20,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:20,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317654369] [2020-10-27 20:09:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:20,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:20,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:20,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:20,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:09:20,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:09:20,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-27 20:09:20,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:20,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:20,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:09:20,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:20,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:20,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:20,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:20,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:20,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:20,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:20,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:09:20,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:20,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:20,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:20,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:20,522 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 20:09:20,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317654369] [2020-10-27 20:09:20,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:20,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:20,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749625579] [2020-10-27 20:09:20,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:20,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:20,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:20,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:20,525 INFO L87 Difference]: Start difference. First operand 157 states and 286 transitions. Second operand 4 states. [2020-10-27 20:09:20,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:20,725 INFO L93 Difference]: Finished difference Result 205 states and 373 transitions. [2020-10-27 20:09:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:20,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 20:09:20,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:20,728 INFO L225 Difference]: With dead ends: 205 [2020-10-27 20:09:20,728 INFO L226 Difference]: Without dead ends: 202 [2020-10-27 20:09:20,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-27 20:09:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 157. [2020-10-27 20:09:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-27 20:09:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 284 transitions. [2020-10-27 20:09:20,744 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 284 transitions. Word has length 25 [2020-10-27 20:09:20,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:20,745 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 284 transitions. [2020-10-27 20:09:20,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:20,745 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 284 transitions. [2020-10-27 20:09:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:09:20,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:20,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:20,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:09:20,747 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:20,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:20,747 INFO L82 PathProgramCache]: Analyzing trace with hash 530507306, now seen corresponding path program 1 times [2020-10-27 20:09:20,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:20,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622289003] [2020-10-27 20:09:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:20,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:20,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:20,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:20,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:09:20,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:09:20,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-27 20:09:20,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:20,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:20,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:09:20,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:20,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:20,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:20,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:20,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:20,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:20,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:20,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 20:09:20,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:20,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:20,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:20,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:20,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:20,983 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 20:09:20,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622289003] [2020-10-27 20:09:20,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:20,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:20,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028756559] [2020-10-27 20:09:20,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:20,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:20,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:20,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:20,991 INFO L87 Difference]: Start difference. First operand 157 states and 284 transitions. Second operand 4 states. [2020-10-27 20:09:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:21,216 INFO L93 Difference]: Finished difference Result 297 states and 543 transitions. [2020-10-27 20:09:21,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:21,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 20:09:21,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:21,220 INFO L225 Difference]: With dead ends: 297 [2020-10-27 20:09:21,220 INFO L226 Difference]: Without dead ends: 294 [2020-10-27 20:09:21,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-27 20:09:21,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 213. [2020-10-27 20:09:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-27 20:09:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 384 transitions. [2020-10-27 20:09:21,265 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 384 transitions. Word has length 26 [2020-10-27 20:09:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:21,265 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 384 transitions. [2020-10-27 20:09:21,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 384 transitions. [2020-10-27 20:09:21,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:09:21,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:21,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:21,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:09:21,273 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:21,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:21,274 INFO L82 PathProgramCache]: Analyzing trace with hash -490561048, now seen corresponding path program 1 times [2020-10-27 20:09:21,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:21,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117167684] [2020-10-27 20:09:21,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:21,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:21,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:09:21,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:09:21,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 20:09:21,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:21,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:21,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:09:21,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:21,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:21,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:21,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:21,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:21,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:21,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:09:21,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:21,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:21,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:21,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:21,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:21,471 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 20:09:21,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117167684] [2020-10-27 20:09:21,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:21,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:21,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376256801] [2020-10-27 20:09:21,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:21,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:21,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:21,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:21,474 INFO L87 Difference]: Start difference. First operand 213 states and 384 transitions. Second operand 4 states. [2020-10-27 20:09:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:21,681 INFO L93 Difference]: Finished difference Result 509 states and 927 transitions. [2020-10-27 20:09:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:21,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 20:09:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:21,684 INFO L225 Difference]: With dead ends: 509 [2020-10-27 20:09:21,684 INFO L226 Difference]: Without dead ends: 302 [2020-10-27 20:09:21,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:21,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-27 20:09:21,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2020-10-27 20:09:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-27 20:09:21,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 540 transitions. [2020-10-27 20:09:21,701 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 540 transitions. Word has length 26 [2020-10-27 20:09:21,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:21,701 INFO L481 AbstractCegarLoop]: Abstraction has 301 states and 540 transitions. [2020-10-27 20:09:21,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:21,701 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 540 transitions. [2020-10-27 20:09:21,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:09:21,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:21,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:21,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:09:21,704 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:21,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:21,704 INFO L82 PathProgramCache]: Analyzing trace with hash -727533250, now seen corresponding path program 1 times [2020-10-27 20:09:21,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:21,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203182005] [2020-10-27 20:09:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:21,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:21,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:09:21,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:09:21,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-10-27 20:09:21,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:21,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:21,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:09:21,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:21,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:22,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:22,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:22,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:22,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:22,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:22,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:09:22,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:22,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:22,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:22,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:22,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:22,026 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 20:09:22,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203182005] [2020-10-27 20:09:22,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:22,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:22,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807346525] [2020-10-27 20:09:22,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:22,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:22,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:22,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:22,030 INFO L87 Difference]: Start difference. First operand 301 states and 540 transitions. Second operand 4 states. [2020-10-27 20:09:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:22,238 INFO L93 Difference]: Finished difference Result 565 states and 1023 transitions. [2020-10-27 20:09:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:22,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 20:09:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:22,244 INFO L225 Difference]: With dead ends: 565 [2020-10-27 20:09:22,245 INFO L226 Difference]: Without dead ends: 562 [2020-10-27 20:09:22,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:22,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-10-27 20:09:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 417. [2020-10-27 20:09:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-10-27 20:09:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 740 transitions. [2020-10-27 20:09:22,272 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 740 transitions. Word has length 27 [2020-10-27 20:09:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:22,272 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 740 transitions. [2020-10-27 20:09:22,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 740 transitions. [2020-10-27 20:09:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:09:22,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:22,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:22,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:09:22,279 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:22,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1748601604, now seen corresponding path program 1 times [2020-10-27 20:09:22,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:22,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100327432] [2020-10-27 20:09:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:22,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:22,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:22,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:22,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:22,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:09:22,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:09:22,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-27 20:09:22,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:22,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:22,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:09:22,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:22,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:22,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:22,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:22,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:22,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:22,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:22,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:22,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:22,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:22,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:22,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:22,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:22,592 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 20:09:22,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100327432] [2020-10-27 20:09:22,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:22,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:22,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569447221] [2020-10-27 20:09:22,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:22,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:22,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:22,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:22,597 INFO L87 Difference]: Start difference. First operand 417 states and 740 transitions. Second operand 4 states. [2020-10-27 20:09:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:22,836 INFO L93 Difference]: Finished difference Result 997 states and 1783 transitions. [2020-10-27 20:09:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:22,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 20:09:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:22,841 INFO L225 Difference]: With dead ends: 997 [2020-10-27 20:09:22,841 INFO L226 Difference]: Without dead ends: 586 [2020-10-27 20:09:22,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-10-27 20:09:22,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 585. [2020-10-27 20:09:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-10-27 20:09:22,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1032 transitions. [2020-10-27 20:09:22,866 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1032 transitions. Word has length 27 [2020-10-27 20:09:22,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:22,866 INFO L481 AbstractCegarLoop]: Abstraction has 585 states and 1032 transitions. [2020-10-27 20:09:22,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:22,867 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1032 transitions. [2020-10-27 20:09:22,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:09:22,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:22,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:22,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:09:22,869 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:22,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:22,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1072074251, now seen corresponding path program 1 times [2020-10-27 20:09:22,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:22,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505854697] [2020-10-27 20:09:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:22,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:22,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:22,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:22,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:23,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:23,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:09:23,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:09:23,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-27 20:09:23,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:23,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:23,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:09:23,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:23,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:23,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:23,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:23,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:23,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:23,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:23,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:09:23,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:23,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:23,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:23,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:23,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:23,275 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 20:09:23,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505854697] [2020-10-27 20:09:23,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:23,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:23,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666265229] [2020-10-27 20:09:23,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:23,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:23,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:23,285 INFO L87 Difference]: Start difference. First operand 585 states and 1032 transitions. Second operand 4 states. [2020-10-27 20:09:23,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:23,503 INFO L93 Difference]: Finished difference Result 1085 states and 1931 transitions. [2020-10-27 20:09:23,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:23,504 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 20:09:23,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:23,511 INFO L225 Difference]: With dead ends: 1085 [2020-10-27 20:09:23,511 INFO L226 Difference]: Without dead ends: 1082 [2020-10-27 20:09:23,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:23,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-10-27 20:09:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 825. [2020-10-27 20:09:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 825 states. [2020-10-27 20:09:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1432 transitions. [2020-10-27 20:09:23,545 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1432 transitions. Word has length 28 [2020-10-27 20:09:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:23,545 INFO L481 AbstractCegarLoop]: Abstraction has 825 states and 1432 transitions. [2020-10-27 20:09:23,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1432 transitions. [2020-10-27 20:09:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:09:23,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:23,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:23,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:09:23,551 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:23,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2093142605, now seen corresponding path program 1 times [2020-10-27 20:09:23,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:23,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712556808] [2020-10-27 20:09:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:23,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:23,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:23,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:23,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:23,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:23,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:09:23,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:09:23,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-27 20:09:23,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:23,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:23,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:09:23,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:23,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:23,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:24,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:24,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:24,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:24,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:24,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:09:24,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:24,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:24,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:24,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:24,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:24,029 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 20:09:24,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712556808] [2020-10-27 20:09:24,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:24,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:24,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4139725] [2020-10-27 20:09:24,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:24,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:24,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:24,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:24,034 INFO L87 Difference]: Start difference. First operand 825 states and 1432 transitions. Second operand 4 states. [2020-10-27 20:09:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:24,243 INFO L93 Difference]: Finished difference Result 1965 states and 3435 transitions. [2020-10-27 20:09:24,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:24,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 20:09:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:24,250 INFO L225 Difference]: With dead ends: 1965 [2020-10-27 20:09:24,250 INFO L226 Difference]: Without dead ends: 1146 [2020-10-27 20:09:24,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2020-10-27 20:09:24,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1145. [2020-10-27 20:09:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1145 states. [2020-10-27 20:09:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1976 transitions. [2020-10-27 20:09:24,298 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1976 transitions. Word has length 28 [2020-10-27 20:09:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:24,298 INFO L481 AbstractCegarLoop]: Abstraction has 1145 states and 1976 transitions. [2020-10-27 20:09:24,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1976 transitions. [2020-10-27 20:09:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:09:24,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:24,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:24,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:09:24,301 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:24,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:24,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1132067177, now seen corresponding path program 1 times [2020-10-27 20:09:24,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:24,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71977324] [2020-10-27 20:09:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:24,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:24,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:24,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:24,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:24,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:24,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:24,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:09:24,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:09:24,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 666 [2020-10-27 20:09:24,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:09:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:24,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:25,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:25,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:25,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:25,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:25,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:25,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:25,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:25,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:25,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:25,052 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 20:09:25,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71977324] [2020-10-27 20:09:25,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:25,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:25,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542493536] [2020-10-27 20:09:25,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:25,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:25,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:25,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:25,054 INFO L87 Difference]: Start difference. First operand 1145 states and 1976 transitions. Second operand 4 states. [2020-10-27 20:09:25,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:25,299 INFO L93 Difference]: Finished difference Result 2093 states and 3643 transitions. [2020-10-27 20:09:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:25,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 20:09:25,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:25,313 INFO L225 Difference]: With dead ends: 2093 [2020-10-27 20:09:25,313 INFO L226 Difference]: Without dead ends: 2090 [2020-10-27 20:09:25,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-10-27 20:09:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1641. [2020-10-27 20:09:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1641 states. [2020-10-27 20:09:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2776 transitions. [2020-10-27 20:09:25,390 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2776 transitions. Word has length 29 [2020-10-27 20:09:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:25,391 INFO L481 AbstractCegarLoop]: Abstraction has 1641 states and 2776 transitions. [2020-10-27 20:09:25,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2776 transitions. [2020-10-27 20:09:25,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:09:25,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:25,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:25,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:09:25,395 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:25,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:25,396 INFO L82 PathProgramCache]: Analyzing trace with hash 110998823, now seen corresponding path program 1 times [2020-10-27 20:09:25,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:25,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454629039] [2020-10-27 20:09:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:25,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:25,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:26,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:09:26,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:09:26,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-10-27 20:09:26,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:26,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:26,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:09:26,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:26,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:26,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:26,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:26,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:26,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:26,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:26,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:26,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:26,206 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 20:09:26,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454629039] [2020-10-27 20:09:26,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:26,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:26,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818564046] [2020-10-27 20:09:26,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:26,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:26,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:26,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:26,211 INFO L87 Difference]: Start difference. First operand 1641 states and 2776 transitions. Second operand 4 states. [2020-10-27 20:09:26,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:26,460 INFO L93 Difference]: Finished difference Result 3885 states and 6619 transitions. [2020-10-27 20:09:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:26,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 20:09:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:26,473 INFO L225 Difference]: With dead ends: 3885 [2020-10-27 20:09:26,473 INFO L226 Difference]: Without dead ends: 2250 [2020-10-27 20:09:26,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2020-10-27 20:09:26,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2249. [2020-10-27 20:09:26,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2249 states. [2020-10-27 20:09:26,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 3784 transitions. [2020-10-27 20:09:26,565 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 3784 transitions. Word has length 29 [2020-10-27 20:09:26,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:26,565 INFO L481 AbstractCegarLoop]: Abstraction has 2249 states and 3784 transitions. [2020-10-27 20:09:26,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:26,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 3784 transitions. [2020-10-27 20:09:26,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:09:26,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:26,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:26,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:09:26,569 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash 740985280, now seen corresponding path program 1 times [2020-10-27 20:09:26,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:26,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29880996] [2020-10-27 20:09:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:26,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:27,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:27,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:09:27,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:09:27,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1227 [2020-10-27 20:09:27,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:27,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:27,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:09:27,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:27,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:27,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:27,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:27,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:27,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:27,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:27,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:09:27,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:27,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:27,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:27,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:27,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:27,871 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 20:09:27,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29880996] [2020-10-27 20:09:27,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:27,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:27,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314271440] [2020-10-27 20:09:27,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:27,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:27,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:27,874 INFO L87 Difference]: Start difference. First operand 2249 states and 3784 transitions. Second operand 4 states. [2020-10-27 20:09:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:28,137 INFO L93 Difference]: Finished difference Result 4045 states and 6859 transitions. [2020-10-27 20:09:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:28,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 20:09:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:28,157 INFO L225 Difference]: With dead ends: 4045 [2020-10-27 20:09:28,157 INFO L226 Difference]: Without dead ends: 4042 [2020-10-27 20:09:28,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4042 states. [2020-10-27 20:09:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4042 to 3273. [2020-10-27 20:09:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3273 states. [2020-10-27 20:09:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 5384 transitions. [2020-10-27 20:09:28,291 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 5384 transitions. Word has length 30 [2020-10-27 20:09:28,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:28,291 INFO L481 AbstractCegarLoop]: Abstraction has 3273 states and 5384 transitions. [2020-10-27 20:09:28,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 5384 transitions. [2020-10-27 20:09:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:09:28,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:28,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:28,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:09:28,297 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash -280083074, now seen corresponding path program 1 times [2020-10-27 20:09:28,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:28,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850690898] [2020-10-27 20:09:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:28,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:28,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:29,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:29,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:09:29,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:09:29,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-27 20:09:29,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:29,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:29,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:09:29,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:29,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:29,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:29,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:29,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:29,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:29,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:29,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:29,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:29,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:29,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:29,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:29,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:09:29,533 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 20:09:29,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850690898] [2020-10-27 20:09:29,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:29,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:29,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091683656] [2020-10-27 20:09:29,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:29,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:29,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:29,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:29,535 INFO L87 Difference]: Start difference. First operand 3273 states and 5384 transitions. Second operand 4 states. [2020-10-27 20:09:29,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:29,813 INFO L93 Difference]: Finished difference Result 7693 states and 12747 transitions. [2020-10-27 20:09:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:29,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 20:09:29,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:29,835 INFO L225 Difference]: With dead ends: 7693 [2020-10-27 20:09:29,836 INFO L226 Difference]: Without dead ends: 4426 [2020-10-27 20:09:29,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2020-10-27 20:09:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 4425. [2020-10-27 20:09:30,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4425 states. [2020-10-27 20:09:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 7240 transitions. [2020-10-27 20:09:30,031 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 7240 transitions. Word has length 30 [2020-10-27 20:09:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:30,032 INFO L481 AbstractCegarLoop]: Abstraction has 4425 states and 7240 transitions. [2020-10-27 20:09:30,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:30,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 7240 transitions. [2020-10-27 20:09:30,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:09:30,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:30,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:30,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:09:30,038 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:30,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:30,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1502358932, now seen corresponding path program 1 times [2020-10-27 20:09:30,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:30,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018599487] [2020-10-27 20:09:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:30,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:30,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:30,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:30,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:30,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:30,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:30,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:32,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:32,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:09:32,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:09:32,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2115 [2020-10-27 20:09:32,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:09:32,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:32,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:09:32,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:32,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:32,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:32,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:32,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:32,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:09:32,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:32,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:32,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:32,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:32,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:32,247 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 20:09:32,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018599487] [2020-10-27 20:09:32,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:32,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:32,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366281655] [2020-10-27 20:09:32,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:32,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:32,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:32,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:32,250 INFO L87 Difference]: Start difference. First operand 4425 states and 7240 transitions. Second operand 4 states. [2020-10-27 20:09:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:32,582 INFO L93 Difference]: Finished difference Result 7821 states and 12875 transitions. [2020-10-27 20:09:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:32,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 20:09:32,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:32,639 INFO L225 Difference]: With dead ends: 7821 [2020-10-27 20:09:32,639 INFO L226 Difference]: Without dead ends: 7818 [2020-10-27 20:09:32,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7818 states. [2020-10-27 20:09:32,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7818 to 6537. [2020-10-27 20:09:32,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6537 states. [2020-10-27 20:09:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6537 states to 6537 states and 10440 transitions. [2020-10-27 20:09:32,971 INFO L78 Accepts]: Start accepts. Automaton has 6537 states and 10440 transitions. Word has length 31 [2020-10-27 20:09:32,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:32,972 INFO L481 AbstractCegarLoop]: Abstraction has 6537 states and 10440 transitions. [2020-10-27 20:09:32,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:32,972 INFO L276 IsEmpty]: Start isEmpty. Operand 6537 states and 10440 transitions. [2020-10-27 20:09:32,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:09:32,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:32,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:32,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:09:32,986 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:32,989 INFO L82 PathProgramCache]: Analyzing trace with hash 481290578, now seen corresponding path program 1 times [2020-10-27 20:09:32,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:32,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269557628] [2020-10-27 20:09:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:33,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:33,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:33,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:33,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:33,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:33,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:33,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:34,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:34,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:09:34,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:09:34,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1812 [2020-10-27 20:09:34,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:34,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:34,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:09:34,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:34,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:34,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:34,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:34,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:34,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:34,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:34,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:09:34,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:34,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:34,866 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 20:09:34,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269557628] [2020-10-27 20:09:34,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:34,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:34,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962925564] [2020-10-27 20:09:34,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:34,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:34,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:34,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:34,869 INFO L87 Difference]: Start difference. First operand 6537 states and 10440 transitions. Second operand 4 states. [2020-10-27 20:09:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:35,239 INFO L93 Difference]: Finished difference Result 15245 states and 24523 transitions. [2020-10-27 20:09:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:35,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 20:09:35,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:35,262 INFO L225 Difference]: With dead ends: 15245 [2020-10-27 20:09:35,263 INFO L226 Difference]: Without dead ends: 8714 [2020-10-27 20:09:35,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:35,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8714 states. [2020-10-27 20:09:35,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8714 to 8713. [2020-10-27 20:09:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8713 states. [2020-10-27 20:09:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8713 states to 8713 states and 13832 transitions. [2020-10-27 20:09:35,655 INFO L78 Accepts]: Start accepts. Automaton has 8713 states and 13832 transitions. Word has length 31 [2020-10-27 20:09:35,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:35,655 INFO L481 AbstractCegarLoop]: Abstraction has 8713 states and 13832 transitions. [2020-10-27 20:09:35,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 8713 states and 13832 transitions. [2020-10-27 20:09:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:09:35,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:35,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:35,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:09:35,667 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:35,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:35,668 INFO L82 PathProgramCache]: Analyzing trace with hash -664851061, now seen corresponding path program 1 times [2020-10-27 20:09:35,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:35,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186746523] [2020-10-27 20:09:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:35,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:35,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:39,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:39,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:09:39,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:09:39,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3498 [2020-10-27 20:09:39,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:39,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:39,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:09:39,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:39,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:39,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:39,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:39,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:39,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:39,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:39,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:09:39,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:39,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:39,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:39,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:39,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:39,233 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 20:09:39,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186746523] [2020-10-27 20:09:39,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:39,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:39,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500506847] [2020-10-27 20:09:39,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:39,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:39,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:39,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:39,235 INFO L87 Difference]: Start difference. First operand 8713 states and 13832 transitions. Second operand 4 states. [2020-10-27 20:09:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:39,662 INFO L93 Difference]: Finished difference Result 15117 states and 24075 transitions. [2020-10-27 20:09:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:39,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-27 20:09:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:39,696 INFO L225 Difference]: With dead ends: 15117 [2020-10-27 20:09:39,696 INFO L226 Difference]: Without dead ends: 15114 [2020-10-27 20:09:39,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:39,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15114 states. [2020-10-27 20:09:40,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15114 to 13065. [2020-10-27 20:09:40,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13065 states. [2020-10-27 20:09:40,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13065 states to 13065 states and 20232 transitions. [2020-10-27 20:09:40,094 INFO L78 Accepts]: Start accepts. Automaton has 13065 states and 20232 transitions. Word has length 32 [2020-10-27 20:09:40,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:40,094 INFO L481 AbstractCegarLoop]: Abstraction has 13065 states and 20232 transitions. [2020-10-27 20:09:40,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:40,094 INFO L276 IsEmpty]: Start isEmpty. Operand 13065 states and 20232 transitions. [2020-10-27 20:09:40,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 20:09:40,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:40,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:40,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:09:40,171 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:40,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1685919415, now seen corresponding path program 1 times [2020-10-27 20:09:40,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:40,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850141079] [2020-10-27 20:09:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:40,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:40,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:40,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:40,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:40,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:40,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:40,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:40,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:43,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:43,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:09:43,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:09:43,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3212 [2020-10-27 20:09:43,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:09:43,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:43,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:43,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:43,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:43,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:43,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:43,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:43,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:09:43,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:43,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:43,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:43,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:43,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:43,451 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 20:09:43,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850141079] [2020-10-27 20:09:43,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:43,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:43,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981174266] [2020-10-27 20:09:43,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:43,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:43,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:43,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:43,453 INFO L87 Difference]: Start difference. First operand 13065 states and 20232 transitions. Second operand 4 states. [2020-10-27 20:09:43,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:43,944 INFO L93 Difference]: Finished difference Result 30221 states and 47115 transitions. [2020-10-27 20:09:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:43,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-27 20:09:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:43,985 INFO L225 Difference]: With dead ends: 30221 [2020-10-27 20:09:43,985 INFO L226 Difference]: Without dead ends: 17162 [2020-10-27 20:09:44,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:44,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17162 states. [2020-10-27 20:09:44,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17162 to 17161. [2020-10-27 20:09:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17161 states. [2020-10-27 20:09:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17161 states to 17161 states and 26376 transitions. [2020-10-27 20:09:44,670 INFO L78 Accepts]: Start accepts. Automaton has 17161 states and 26376 transitions. Word has length 32 [2020-10-27 20:09:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:44,670 INFO L481 AbstractCegarLoop]: Abstraction has 17161 states and 26376 transitions. [2020-10-27 20:09:44,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:44,670 INFO L276 IsEmpty]: Start isEmpty. Operand 17161 states and 26376 transitions. [2020-10-27 20:09:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:09:44,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:44,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:44,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:09:44,692 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:44,692 INFO L82 PathProgramCache]: Analyzing trace with hash 871126463, now seen corresponding path program 1 times [2020-10-27 20:09:44,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:44,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931304596] [2020-10-27 20:09:44,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:44,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:44,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:44,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:44,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:44,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:44,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:44,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:45,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:45,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:49,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:49,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:09:49,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:09:49,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:09:49,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:49,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:49,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:09:49,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:09:49,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:49,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:49,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:49,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:49,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:49,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:49,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:09:49,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:49,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:49,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:49,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:49,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:49,769 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 20:09:49,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931304596] [2020-10-27 20:09:49,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:49,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:49,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019314562] [2020-10-27 20:09:49,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:49,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:49,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:49,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:49,772 INFO L87 Difference]: Start difference. First operand 17161 states and 26376 transitions. Second operand 4 states. [2020-10-27 20:09:50,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:50,489 INFO L93 Difference]: Finished difference Result 50957 states and 78091 transitions. [2020-10-27 20:09:50,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:50,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 20:09:50,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:50,568 INFO L225 Difference]: With dead ends: 50957 [2020-10-27 20:09:50,568 INFO L226 Difference]: Without dead ends: 33802 [2020-10-27 20:09:50,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33802 states. [2020-10-27 20:09:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33802 to 33801. [2020-10-27 20:09:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33801 states. [2020-10-27 20:09:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33801 states to 33801 states and 50696 transitions. [2020-10-27 20:09:51,545 INFO L78 Accepts]: Start accepts. Automaton has 33801 states and 50696 transitions. Word has length 33 [2020-10-27 20:09:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:51,546 INFO L481 AbstractCegarLoop]: Abstraction has 33801 states and 50696 transitions. [2020-10-27 20:09:51,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 33801 states and 50696 transitions. [2020-10-27 20:09:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 20:09:51,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:51,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:51,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:09:51,588 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:51,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1892194817, now seen corresponding path program 1 times [2020-10-27 20:09:51,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:51,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568243721] [2020-10-27 20:09:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:51,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:51,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:51,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:51,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:51,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:51,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:51,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:52,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:56,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:56,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:09:56,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:09:56,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:09:56,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:56,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:56,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:09:56,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:09:56,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:56,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:56,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:56,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:56,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:56,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:56,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:09:56,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:56,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:56,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:56,675 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 20:09:56,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568243721] [2020-10-27 20:09:56,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:56,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:56,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271663056] [2020-10-27 20:09:56,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:56,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:56,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:56,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:56,678 INFO L87 Difference]: Start difference. First operand 33801 states and 50696 transitions. Second operand 4 states. [2020-10-27 20:09:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:57,477 INFO L93 Difference]: Finished difference Result 36877 states and 55819 transitions. [2020-10-27 20:09:57,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:57,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-27 20:09:57,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:57,536 INFO L225 Difference]: With dead ends: 36877 [2020-10-27 20:09:57,537 INFO L226 Difference]: Without dead ends: 36874 [2020-10-27 20:09:57,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:09:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36874 states. [2020-10-27 20:09:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36874 to 33801. [2020-10-27 20:09:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33801 states. [2020-10-27 20:09:58,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33801 states to 33801 states and 50184 transitions. [2020-10-27 20:09:58,530 INFO L78 Accepts]: Start accepts. Automaton has 33801 states and 50184 transitions. Word has length 33 [2020-10-27 20:09:58,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:58,530 INFO L481 AbstractCegarLoop]: Abstraction has 33801 states and 50184 transitions. [2020-10-27 20:09:58,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand 33801 states and 50184 transitions. [2020-10-27 20:09:58,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:09:58,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:58,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:09:58,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:09:58,565 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:58,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1241800022, now seen corresponding path program 1 times [2020-10-27 20:09:58,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:58,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885107361] [2020-10-27 20:09:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:58,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:58,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:58,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:58,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:58,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:58,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:58,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:58,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:59,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:03,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:03,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:10:03,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:10:03,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 20:10:03,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:03,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:03,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 20:10:03,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:10:03,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:03,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:03,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:03,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:03,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:03,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:03,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:10:03,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:03,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:03,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:03,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:03,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:03,632 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 20:10:03,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885107361] [2020-10-27 20:10:03,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:03,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:03,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155271844] [2020-10-27 20:10:03,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:03,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:03,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:03,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:03,635 INFO L87 Difference]: Start difference. First operand 33801 states and 50184 transitions. Second operand 4 states. [2020-10-27 20:10:04,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:04,719 INFO L93 Difference]: Finished difference Result 56333 states and 82955 transitions. [2020-10-27 20:10:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:04,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-27 20:10:04,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:04,798 INFO L225 Difference]: With dead ends: 56333 [2020-10-27 20:10:04,798 INFO L226 Difference]: Without dead ends: 56330 [2020-10-27 20:10:04,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:04,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56330 states. [2020-10-27 20:10:05,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56330 to 52233. [2020-10-27 20:10:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52233 states. [2020-10-27 20:10:05,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52233 states to 52233 states and 75784 transitions. [2020-10-27 20:10:05,841 INFO L78 Accepts]: Start accepts. Automaton has 52233 states and 75784 transitions. Word has length 34 [2020-10-27 20:10:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:05,842 INFO L481 AbstractCegarLoop]: Abstraction has 52233 states and 75784 transitions. [2020-10-27 20:10:05,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:05,842 INFO L276 IsEmpty]: Start isEmpty. Operand 52233 states and 75784 transitions. [2020-10-27 20:10:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 20:10:05,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:05,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:05,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 20:10:05,884 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:05,884 INFO L82 PathProgramCache]: Analyzing trace with hash 220731668, now seen corresponding path program 1 times [2020-10-27 20:10:05,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:05,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535180339] [2020-10-27 20:10:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:05,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:05,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:05,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:05,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:05,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:05,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:05,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:05,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:06,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:10,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:10,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 20:10:10,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:10:10,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4792 [2020-10-27 20:10:10,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:10,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:10,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 20:10:10,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:10:10,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:10,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:10,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:10,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:10,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:10,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:10,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:10:10,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:10,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:10,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:10,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:10,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:10,729 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 20:10:10,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535180339] [2020-10-27 20:10:10,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:10,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:10,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263881742] [2020-10-27 20:10:10,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:10,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:10,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:10,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:10,731 INFO L87 Difference]: Start difference. First operand 52233 states and 75784 transitions. Second operand 4 states. [2020-10-27 20:10:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:11,736 INFO L93 Difference]: Finished difference Result 118797 states and 173067 transitions. [2020-10-27 20:10:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:11,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-27 20:10:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:11,817 INFO L225 Difference]: With dead ends: 118797 [2020-10-27 20:10:11,817 INFO L226 Difference]: Without dead ends: 66570 [2020-10-27 20:10:11,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:11,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66570 states. [2020-10-27 20:10:13,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66570 to 66569. [2020-10-27 20:10:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66569 states. [2020-10-27 20:10:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66569 states to 66569 states and 95240 transitions. [2020-10-27 20:10:13,658 INFO L78 Accepts]: Start accepts. Automaton has 66569 states and 95240 transitions. Word has length 34 [2020-10-27 20:10:13,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:13,658 INFO L481 AbstractCegarLoop]: Abstraction has 66569 states and 95240 transitions. [2020-10-27 20:10:13,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 66569 states and 95240 transitions. [2020-10-27 20:10:13,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:10:13,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:13,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:13,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 20:10:13,721 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:13,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:13,721 INFO L82 PathProgramCache]: Analyzing trace with hash -152210966, now seen corresponding path program 1 times [2020-10-27 20:10:13,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:13,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557638555] [2020-10-27 20:10:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:13,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:13,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:14,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:14,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:18,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:18,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:10:18,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 20:10:18,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:10:18,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:18,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:18,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 20:10:18,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:10:18,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:18,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:18,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:18,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:18,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:18,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:18,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:10:18,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:18,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:18,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:18,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:18,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:18,782 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 20:10:18,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557638555] [2020-10-27 20:10:18,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:18,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:18,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430707862] [2020-10-27 20:10:18,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:18,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:18,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:18,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:18,785 INFO L87 Difference]: Start difference. First operand 66569 states and 95240 transitions. Second operand 4 states. [2020-10-27 20:10:20,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:20,282 INFO L93 Difference]: Finished difference Result 108556 states and 152586 transitions. [2020-10-27 20:10:20,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:20,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-27 20:10:20,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:20,407 INFO L225 Difference]: With dead ends: 108556 [2020-10-27 20:10:20,407 INFO L226 Difference]: Without dead ends: 108553 [2020-10-27 20:10:20,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108553 states. [2020-10-27 20:10:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108553 to 104457. [2020-10-27 20:10:22,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104457 states. [2020-10-27 20:10:22,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104457 states to 104457 states and 146440 transitions. [2020-10-27 20:10:22,932 INFO L78 Accepts]: Start accepts. Automaton has 104457 states and 146440 transitions. Word has length 35 [2020-10-27 20:10:22,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:22,932 INFO L481 AbstractCegarLoop]: Abstraction has 104457 states and 146440 transitions. [2020-10-27 20:10:22,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:22,932 INFO L276 IsEmpty]: Start isEmpty. Operand 104457 states and 146440 transitions. [2020-10-27 20:10:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 20:10:23,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:10:23,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:10:23,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 20:10:23,035 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:10:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:10:23,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1173279320, now seen corresponding path program 1 times [2020-10-27 20:10:23,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:10:23,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592086668] [2020-10-27 20:10:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:10:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:23,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:23,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:23,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:23,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:23,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:23,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:23,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:23,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:23,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:23,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:28,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:28,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 20:10:28,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 20:10:28,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:10:28,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:10:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 20:10:28,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:10:28,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:28,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:10:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:10:28,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:10:28,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:10:28,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:10:28,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:10:28,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:10:28,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:10:28,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:10:28,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:10:28,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:10:28,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:10:28,102 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 20:10:28,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592086668] [2020-10-27 20:10:28,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:10:28,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:10:28,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546808483] [2020-10-27 20:10:28,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:10:28,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:10:28,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:10:28,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:10:28,106 INFO L87 Difference]: Start difference. First operand 104457 states and 146440 transitions. Second operand 4 states. [2020-10-27 20:10:30,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:10:30,083 INFO L93 Difference]: Finished difference Result 235529 states and 330760 transitions. [2020-10-27 20:10:30,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:10:30,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-27 20:10:30,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:10:30,084 INFO L225 Difference]: With dead ends: 235529 [2020-10-27 20:10:30,084 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 20:10:30,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:10:30,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 20:10:30,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 20:10:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 20:10:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 20:10:30,558 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-27 20:10:30,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:10:30,558 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 20:10:30,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:10:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 20:10:30,559 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 20:10:30,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 20:10:30,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.