/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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:08:45,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:08:46,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:08:46,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:08:46,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:08:46,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:08:46,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:08:46,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:08:46,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:08:46,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:08:46,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:08:46,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:08:46,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:08:46,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:08:46,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:08:46,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:08:46,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:08:46,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:08:46,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:08:46,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:08:46,083 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:08:46,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:08:46,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:08:46,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:08:46,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:08:46,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:08:46,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:08:46,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:08:46,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:08:46,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:08:46,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:08:46,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:08:46,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:08:46,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:08:46,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:08:46,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:08:46,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:08:46,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:08:46,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:08:46,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:08:46,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:08:46,105 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 20:08:46,138 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:08:46,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:08:46,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:08:46,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:08:46,141 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:08:46,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:08:46,141 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:08:46,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:08:46,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:08:46,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:08:46,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:08:46,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:08:46,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:08:46,144 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:08:46,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:08:46,144 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:08:46,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:08:46,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:08:46,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:08:46,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:08:46,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:08:46,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:08:46,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:08:46,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:08:46,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:08:46,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:08:46,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:08:46,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:08:46,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:08:46,147 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:08:46,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:08:46,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:08:46,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:08:46,638 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:08:46,642 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:08:46,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-10-27 20:08:46,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b683fad59/6818fa64b9204df585bbe7b3ca0b4f16/FLAG19897290f [2020-10-27 20:08:47,459 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:08:47,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-10-27 20:08:47,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b683fad59/6818fa64b9204df585bbe7b3ca0b4f16/FLAG19897290f [2020-10-27 20:08:47,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b683fad59/6818fa64b9204df585bbe7b3ca0b4f16 [2020-10-27 20:08:47,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:08:47,857 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:08:47,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:08:47,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:08:47,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:08:47,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:08:47" (1/1) ... [2020-10-27 20:08:47,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ffc5bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:47, skipping insertion in model container [2020-10-27 20:08:47,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:08:47" (1/1) ... [2020-10-27 20:08:47,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:08:47,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:08:48,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:08:48,108 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:08:48,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:08:48,156 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:08:48,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48 WrapperNode [2020-10-27 20:08:48,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:08:48,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:08:48,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:08:48,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:08:48,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (1/1) ... [2020-10-27 20:08:48,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:08:48,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:08:48,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:08:48,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:08:48,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (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 20:08:48,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:08:48,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:08:48,328 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:08:48,328 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:08:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:08:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:08:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:08:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:08:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 20:08:48,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:08:48,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:08:48,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:08:48,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:08:48,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:08:48,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:08:48,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:08:48,741 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:08:48,741 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:08:48,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:08:48 BoogieIcfgContainer [2020-10-27 20:08:48,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:08:48,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:08:48,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:08:48,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:08:48,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:08:47" (1/3) ... [2020-10-27 20:08:48,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21944ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:08:48, skipping insertion in model container [2020-10-27 20:08:48,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:08:48" (2/3) ... [2020-10-27 20:08:48,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21944ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:08:48, skipping insertion in model container [2020-10-27 20:08:48,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:08:48" (3/3) ... [2020-10-27 20:08:48,753 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-10-27 20:08:48,772 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:08:48,787 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:08:48,824 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:08:48,887 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:08:48,887 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:08:48,887 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:08:48,887 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:08:48,888 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:08:48,888 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:08:48,888 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:08:48,888 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:08:48,918 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-10-27 20:08:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:08:48,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:48,931 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] [2020-10-27 20:08:48,931 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:48,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1724318403, now seen corresponding path program 1 times [2020-10-27 20:08:48,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:48,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542492537] [2020-10-27 20:08:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:49,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:49,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:49,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:08:49,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:49,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-27 20:08:49,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:49,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:49,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:08:49,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:08:49,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 20:08:49,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:49,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:49,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:49,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:49,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:49,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:08:49,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:49,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:49,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:49,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:49,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:49,700 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 20:08:49,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542492537] [2020-10-27 20:08:49,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:49,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:49,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4343906] [2020-10-27 20:08:49,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:49,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:49,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:49,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:49,727 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 4 states. [2020-10-27 20:08:50,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:50,011 INFO L93 Difference]: Finished difference Result 92 states and 157 transitions. [2020-10-27 20:08:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:50,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 20:08:50,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:50,027 INFO L225 Difference]: With dead ends: 92 [2020-10-27 20:08:50,027 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 20:08:50,030 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 20:08:50,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 20:08:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2020-10-27 20:08:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 20:08:50,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 91 transitions. [2020-10-27 20:08:50,081 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 91 transitions. Word has length 22 [2020-10-27 20:08:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:50,082 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 91 transitions. [2020-10-27 20:08:50,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 91 transitions. [2020-10-27 20:08:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 20:08:50,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:50,084 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] [2020-10-27 20:08:50,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:08:50,084 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:50,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:50,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1559531643, now seen corresponding path program 1 times [2020-10-27 20:08:50,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:50,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510941953] [2020-10-27 20:08:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:50,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:50,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:50,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 20:08:50,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:50,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-27 20:08:50,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:50,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:50,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 20:08:50,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:08:50,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:50,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:50,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:50,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:50,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:50,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:50,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 20:08:50,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:50,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:50,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:50,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:50,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:08:50,318 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 20:08:50,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510941953] [2020-10-27 20:08:50,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:50,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:50,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035696805] [2020-10-27 20:08:50,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:50,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:50,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:50,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:50,323 INFO L87 Difference]: Start difference. First operand 52 states and 91 transitions. Second operand 4 states. [2020-10-27 20:08:50,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:50,515 INFO L93 Difference]: Finished difference Result 119 states and 215 transitions. [2020-10-27 20:08:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:50,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-27 20:08:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:50,517 INFO L225 Difference]: With dead ends: 119 [2020-10-27 20:08:50,518 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 20:08:50,519 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 20:08:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 20:08:50,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-27 20:08:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 20:08:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 127 transitions. [2020-10-27 20:08:50,533 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 127 transitions. Word has length 22 [2020-10-27 20:08:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:50,533 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 127 transitions. [2020-10-27 20:08:50,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 127 transitions. [2020-10-27 20:08:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:08:50,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:50,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:50,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:08:50,535 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:50,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:50,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1907654547, now seen corresponding path program 1 times [2020-10-27 20:08:50,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:50,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630035090] [2020-10-27 20:08:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:50,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:50,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:50,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:50,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:08:50,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:50,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-27 20:08:50,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:50,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:50,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:08:50,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:08:50,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:08:50,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:50,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:50,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:50,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:50,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:50,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:08:50,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:50,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:50,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:50,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:50,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:50,819 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 20:08:50,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630035090] [2020-10-27 20:08:50,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:50,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:50,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129604493] [2020-10-27 20:08:50,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:50,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:50,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:50,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:50,823 INFO L87 Difference]: Start difference. First operand 72 states and 127 transitions. Second operand 4 states. [2020-10-27 20:08:50,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:50,999 INFO L93 Difference]: Finished difference Result 200 states and 364 transitions. [2020-10-27 20:08:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:50,999 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 20:08:51,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:51,001 INFO L225 Difference]: With dead ends: 200 [2020-10-27 20:08:51,002 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 20:08:51,003 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 20:08:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 20:08:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-27 20:08:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 20:08:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 238 transitions. [2020-10-27 20:08:51,019 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 238 transitions. Word has length 23 [2020-10-27 20:08:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:51,020 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 238 transitions. [2020-10-27 20:08:51,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 238 transitions. [2020-10-27 20:08:51,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:08:51,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:51,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:08:51,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:08:51,022 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:51,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:51,023 INFO L82 PathProgramCache]: Analyzing trace with hash -896537297, now seen corresponding path program 1 times [2020-10-27 20:08:51,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:51,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282784373] [2020-10-27 20:08:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:51,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:51,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:08:51,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:51,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 20:08:51,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:51,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:51,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 20:08:51,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:08:51,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:51,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:51,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:51,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:51,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:51,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:08:51,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:51,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:51,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:51,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:51,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:51,249 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 20:08:51,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282784373] [2020-10-27 20:08:51,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:51,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:51,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833989564] [2020-10-27 20:08:51,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:51,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:51,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:51,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:51,252 INFO L87 Difference]: Start difference. First operand 133 states and 238 transitions. Second operand 4 states. [2020-10-27 20:08:51,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:51,421 INFO L93 Difference]: Finished difference Result 173 states and 309 transitions. [2020-10-27 20:08:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:51,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-27 20:08:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:51,424 INFO L225 Difference]: With dead ends: 173 [2020-10-27 20:08:51,424 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 20:08:51,425 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 20:08:51,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 20:08:51,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 133. [2020-10-27 20:08:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 20:08:51,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 236 transitions. [2020-10-27 20:08:51,440 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 236 transitions. Word has length 23 [2020-10-27 20:08:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:51,441 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 236 transitions. [2020-10-27 20:08:51,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 236 transitions. [2020-10-27 20:08:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:08:51,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:51,443 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 20:08:51,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:08:51,443 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:51,444 INFO L82 PathProgramCache]: Analyzing trace with hash 998870152, now seen corresponding path program 1 times [2020-10-27 20:08:51,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:51,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145511261] [2020-10-27 20:08:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:51,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:51,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:08:51,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:51,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 20:08:51,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:51,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:51,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:08:51,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:08:51,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:08:51,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:51,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:51,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:51,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:51,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 20:08:51,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:51,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:51,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:51,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:51,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:51,676 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 20:08:51,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145511261] [2020-10-27 20:08:51,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:51,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:51,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983121782] [2020-10-27 20:08:51,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:51,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:51,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:51,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:51,683 INFO L87 Difference]: Start difference. First operand 133 states and 236 transitions. Second operand 4 states. [2020-10-27 20:08:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:51,849 INFO L93 Difference]: Finished difference Result 249 states and 447 transitions. [2020-10-27 20:08:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:51,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 20:08:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:51,852 INFO L225 Difference]: With dead ends: 249 [2020-10-27 20:08:51,852 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 20:08:51,853 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 20:08:51,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 20:08:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 181. [2020-10-27 20:08:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 20:08:51,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 320 transitions. [2020-10-27 20:08:51,868 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 320 transitions. Word has length 24 [2020-10-27 20:08:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:51,869 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 320 transitions. [2020-10-27 20:08:51,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:51,869 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 320 transitions. [2020-10-27 20:08:51,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 20:08:51,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:51,871 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 20:08:51,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:08:51,871 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:51,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:51,872 INFO L82 PathProgramCache]: Analyzing trace with hash -12247098, now seen corresponding path program 1 times [2020-10-27 20:08:51,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:51,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245014850] [2020-10-27 20:08:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:51,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:51,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:51,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 20:08:51,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:08:51,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 20:08:51,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:51,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:51,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 20:08:51,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:08:51,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:52,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:52,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:52,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:52,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:52,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:08:52,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:52,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:52,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:52,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:52,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:52,051 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 20:08:52,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245014850] [2020-10-27 20:08:52,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:52,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:52,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265543631] [2020-10-27 20:08:52,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:52,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:52,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:52,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:52,054 INFO L87 Difference]: Start difference. First operand 181 states and 320 transitions. Second operand 4 states. [2020-10-27 20:08:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:52,233 INFO L93 Difference]: Finished difference Result 429 states and 767 transitions. [2020-10-27 20:08:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:52,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 20:08:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:52,236 INFO L225 Difference]: With dead ends: 429 [2020-10-27 20:08:52,236 INFO L226 Difference]: Without dead ends: 254 [2020-10-27 20:08:52,238 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 20:08:52,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-27 20:08:52,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2020-10-27 20:08:52,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-27 20:08:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 444 transitions. [2020-10-27 20:08:52,254 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 444 transitions. Word has length 24 [2020-10-27 20:08:52,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:52,254 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 444 transitions. [2020-10-27 20:08:52,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 444 transitions. [2020-10-27 20:08:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:08:52,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:52,257 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 20:08:52,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:08:52,257 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:52,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:52,258 INFO L82 PathProgramCache]: Analyzing trace with hash 906833176, now seen corresponding path program 1 times [2020-10-27 20:08:52,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:52,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317876678] [2020-10-27 20:08:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:52,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:52,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:08:52,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:08:52,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-27 20:08:52,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:52,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:52,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:08:52,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:08:52,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:52,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:52,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:52,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:52,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:52,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:08:52,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:52,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:52,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:52,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:52,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:52,532 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 20:08:52,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317876678] [2020-10-27 20:08:52,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:52,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:52,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950446950] [2020-10-27 20:08:52,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:52,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:52,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:52,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:52,536 INFO L87 Difference]: Start difference. First operand 253 states and 444 transitions. Second operand 4 states. [2020-10-27 20:08:52,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:52,708 INFO L93 Difference]: Finished difference Result 469 states and 831 transitions. [2020-10-27 20:08:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:52,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 20:08:52,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:52,712 INFO L225 Difference]: With dead ends: 469 [2020-10-27 20:08:52,712 INFO L226 Difference]: Without dead ends: 466 [2020-10-27 20:08:52,715 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 20:08:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-27 20:08:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 353. [2020-10-27 20:08:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-27 20:08:52,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 612 transitions. [2020-10-27 20:08:52,740 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 612 transitions. Word has length 25 [2020-10-27 20:08:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:52,742 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 612 transitions. [2020-10-27 20:08:52,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 612 transitions. [2020-10-27 20:08:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:08:52,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:52,748 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 20:08:52,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:08:52,749 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:52,749 INFO L82 PathProgramCache]: Analyzing trace with hash -104284074, now seen corresponding path program 1 times [2020-10-27 20:08:52,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:52,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206031680] [2020-10-27 20:08:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:52,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:52,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:53,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:08:53,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:08:53,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-27 20:08:53,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:53,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:53,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 20:08:53,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:08:53,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:53,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:53,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:53,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:53,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:53,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:08:53,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:53,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:53,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:53,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:53,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:53,066 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 20:08:53,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206031680] [2020-10-27 20:08:53,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:53,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:53,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704989131] [2020-10-27 20:08:53,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:53,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:53,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:53,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:53,072 INFO L87 Difference]: Start difference. First operand 353 states and 612 transitions. Second operand 4 states. [2020-10-27 20:08:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:53,303 INFO L93 Difference]: Finished difference Result 837 states and 1463 transitions. [2020-10-27 20:08:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:53,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-27 20:08:53,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:53,310 INFO L225 Difference]: With dead ends: 837 [2020-10-27 20:08:53,310 INFO L226 Difference]: Without dead ends: 490 [2020-10-27 20:08:53,317 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 20:08:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-27 20:08:53,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 489. [2020-10-27 20:08:53,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-10-27 20:08:53,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 840 transitions. [2020-10-27 20:08:53,370 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 840 transitions. Word has length 25 [2020-10-27 20:08:53,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:53,374 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 840 transitions. [2020-10-27 20:08:53,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:53,375 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 840 transitions. [2020-10-27 20:08:53,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:08:53,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:53,377 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 20:08:53,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:08:53,377 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:53,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:53,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1946302509, now seen corresponding path program 1 times [2020-10-27 20:08:53,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:53,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419567854] [2020-10-27 20:08:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:53,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:53,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:08:53,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:08:53,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 339 [2020-10-27 20:08:53,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:53,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:53,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:08:53,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:08:53,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:53,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:53,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:53,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:53,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:53,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:53,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:53,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:53,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:53,788 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 20:08:53,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419567854] [2020-10-27 20:08:53,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:53,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:53,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137393440] [2020-10-27 20:08:53,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:53,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:53,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:53,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:53,798 INFO L87 Difference]: Start difference. First operand 489 states and 840 transitions. Second operand 4 states. [2020-10-27 20:08:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:53,975 INFO L93 Difference]: Finished difference Result 893 states and 1547 transitions. [2020-10-27 20:08:53,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:53,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 20:08:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:53,982 INFO L225 Difference]: With dead ends: 893 [2020-10-27 20:08:53,982 INFO L226 Difference]: Without dead ends: 890 [2020-10-27 20:08:53,983 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 20:08:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-10-27 20:08:54,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 697. [2020-10-27 20:08:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-27 20:08:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1176 transitions. [2020-10-27 20:08:54,015 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1176 transitions. Word has length 26 [2020-10-27 20:08:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:54,016 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 1176 transitions. [2020-10-27 20:08:54,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:54,016 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1176 transitions. [2020-10-27 20:08:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 20:08:54,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:54,019 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 20:08:54,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:08:54,019 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:54,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:54,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1337547537, now seen corresponding path program 1 times [2020-10-27 20:08:54,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:54,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468432371] [2020-10-27 20:08:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:54,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:54,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 20:08:54,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:08:54,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-27 20:08:54,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:54,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:54,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 20:08:54,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:08:54,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:08:54,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:54,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:54,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:54,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:54,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:54,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:54,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:54,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:54,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:54,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:54,404 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 20:08:54,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468432371] [2020-10-27 20:08:54,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:54,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:54,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793009230] [2020-10-27 20:08:54,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:54,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:54,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:54,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:54,406 INFO L87 Difference]: Start difference. First operand 697 states and 1176 transitions. Second operand 4 states. [2020-10-27 20:08:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:54,620 INFO L93 Difference]: Finished difference Result 1645 states and 2795 transitions. [2020-10-27 20:08:54,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:54,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 20:08:54,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:54,626 INFO L225 Difference]: With dead ends: 1645 [2020-10-27 20:08:54,627 INFO L226 Difference]: Without dead ends: 954 [2020-10-27 20:08:54,633 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 20:08:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2020-10-27 20:08:54,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 953. [2020-10-27 20:08:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2020-10-27 20:08:54,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1592 transitions. [2020-10-27 20:08:54,695 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1592 transitions. Word has length 26 [2020-10-27 20:08:54,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:54,695 INFO L481 AbstractCegarLoop]: Abstraction has 953 states and 1592 transitions. [2020-10-27 20:08:54,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:54,695 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1592 transitions. [2020-10-27 20:08:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:08:54,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:54,707 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 20:08:54,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:08:54,708 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash -199184957, now seen corresponding path program 1 times [2020-10-27 20:08:54,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:54,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134222113] [2020-10-27 20:08:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:54,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:54,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:55,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:08:55,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:08:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 673 [2020-10-27 20:08:55,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:08:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:08:55,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:55,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:55,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:55,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:55,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:55,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:08:55,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:55,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:55,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:55,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:55,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:55,468 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 20:08:55,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134222113] [2020-10-27 20:08:55,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:55,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:55,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996162348] [2020-10-27 20:08:55,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:55,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:55,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:55,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:55,471 INFO L87 Difference]: Start difference. First operand 953 states and 1592 transitions. Second operand 4 states. [2020-10-27 20:08:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:55,668 INFO L93 Difference]: Finished difference Result 1709 states and 2875 transitions. [2020-10-27 20:08:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:55,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 20:08:55,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:55,680 INFO L225 Difference]: With dead ends: 1709 [2020-10-27 20:08:55,681 INFO L226 Difference]: Without dead ends: 1706 [2020-10-27 20:08:55,682 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 20:08:55,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-10-27 20:08:55,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1385. [2020-10-27 20:08:55,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1385 states. [2020-10-27 20:08:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 2264 transitions. [2020-10-27 20:08:55,748 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 2264 transitions. Word has length 27 [2020-10-27 20:08:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:55,749 INFO L481 AbstractCegarLoop]: Abstraction has 1385 states and 2264 transitions. [2020-10-27 20:08:55,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 2264 transitions. [2020-10-27 20:08:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:08:55,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:55,752 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 20:08:55,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:08:55,753 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:55,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1210302207, now seen corresponding path program 1 times [2020-10-27 20:08:55,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:55,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461555881] [2020-10-27 20:08:55,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:55,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:55,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:56,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:56,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:08:56,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 20:08:56,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-27 20:08:56,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:56,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:56,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 20:08:56,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:08:56,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:56,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:56,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:56,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:56,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:56,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:56,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:08:56,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:56,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:56,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:56,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:56,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:56,470 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 20:08:56,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461555881] [2020-10-27 20:08:56,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:56,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:56,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439887942] [2020-10-27 20:08:56,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:56,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:56,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:56,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:56,472 INFO L87 Difference]: Start difference. First operand 1385 states and 2264 transitions. Second operand 4 states. [2020-10-27 20:08:56,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:56,665 INFO L93 Difference]: Finished difference Result 3245 states and 5339 transitions. [2020-10-27 20:08:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:56,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 20:08:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:56,678 INFO L225 Difference]: With dead ends: 3245 [2020-10-27 20:08:56,679 INFO L226 Difference]: Without dead ends: 1866 [2020-10-27 20:08:56,683 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 20:08:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2020-10-27 20:08:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1865. [2020-10-27 20:08:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1865 states. [2020-10-27 20:08:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 3016 transitions. [2020-10-27 20:08:56,771 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 3016 transitions. Word has length 27 [2020-10-27 20:08:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:56,772 INFO L481 AbstractCegarLoop]: Abstraction has 1865 states and 3016 transitions. [2020-10-27 20:08:56,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:56,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 3016 transitions. [2020-10-27 20:08:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:08:56,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:56,775 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 20:08:56,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:08:56,776 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:56,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:56,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1873105122, now seen corresponding path program 1 times [2020-10-27 20:08:56,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:56,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937628012] [2020-10-27 20:08:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:56,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:56,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:56,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:56,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:57,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:57,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:57,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:08:57,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:08:57,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1058 [2020-10-27 20:08:57,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:57,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:57,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:08:57,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:08:57,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:57,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:57,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:57,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:57,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:57,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:57,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:08:57,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:57,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:57,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:57,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:57,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:57,904 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 20:08:57,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937628012] [2020-10-27 20:08:57,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:57,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:57,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010918169] [2020-10-27 20:08:57,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:57,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:57,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:57,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:57,907 INFO L87 Difference]: Start difference. First operand 1865 states and 3016 transitions. Second operand 4 states. [2020-10-27 20:08:58,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:58,209 INFO L93 Difference]: Finished difference Result 3277 states and 5323 transitions. [2020-10-27 20:08:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:58,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 20:08:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:58,233 INFO L225 Difference]: With dead ends: 3277 [2020-10-27 20:08:58,233 INFO L226 Difference]: Without dead ends: 3274 [2020-10-27 20:08:58,236 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 20:08:58,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2020-10-27 20:08:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 2761. [2020-10-27 20:08:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2761 states. [2020-10-27 20:08:58,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 4360 transitions. [2020-10-27 20:08:58,417 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 4360 transitions. Word has length 28 [2020-10-27 20:08:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:08:58,417 INFO L481 AbstractCegarLoop]: Abstraction has 2761 states and 4360 transitions. [2020-10-27 20:08:58,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:08:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 4360 transitions. [2020-10-27 20:08:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 20:08:58,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:08:58,424 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 20:08:58,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:08:58,424 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:08:58,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:08:58,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1410744924, now seen corresponding path program 1 times [2020-10-27 20:08:58,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:08:58,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427938187] [2020-10-27 20:08:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:08:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:58,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:58,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:58,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:58,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:58,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:58,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:59,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:59,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 20:08:59,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:08:59,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1127 [2020-10-27 20:08:59,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:59,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:08:59,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 20:08:59,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:08:59,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:59,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:08:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:08:59,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:08:59,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:08:59,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:08:59,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:08:59,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:08:59,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:08:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:08:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:08:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:08:59,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:08:59,637 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 20:08:59,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427938187] [2020-10-27 20:08:59,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:08:59,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:08:59,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999995248] [2020-10-27 20:08:59,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:08:59,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:08:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:08:59,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:08:59,642 INFO L87 Difference]: Start difference. First operand 2761 states and 4360 transitions. Second operand 4 states. [2020-10-27 20:08:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:08:59,901 INFO L93 Difference]: Finished difference Result 6413 states and 10187 transitions. [2020-10-27 20:08:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:08:59,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 20:08:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:08:59,922 INFO L225 Difference]: With dead ends: 6413 [2020-10-27 20:08:59,922 INFO L226 Difference]: Without dead ends: 3658 [2020-10-27 20:08:59,932 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 20:08:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2020-10-27 20:09:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 3657. [2020-10-27 20:09:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3657 states. [2020-10-27 20:09:00,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 5704 transitions. [2020-10-27 20:09:00,154 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 5704 transitions. Word has length 28 [2020-10-27 20:09:00,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:00,156 INFO L481 AbstractCegarLoop]: Abstraction has 3657 states and 5704 transitions. [2020-10-27 20:09:00,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 5704 transitions. [2020-10-27 20:09:00,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:09:00,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:00,162 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 20:09:00,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 20:09:00,162 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:00,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2069955182, now seen corresponding path program 1 times [2020-10-27 20:09:00,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:00,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879668769] [2020-10-27 20:09:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:00,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:00,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:02,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:02,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:09:02,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:09:02,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2081 [2020-10-27 20:09:02,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:02,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:02,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:09:02,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:09:02,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:09:02,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:02,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:02,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:02,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:02,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:02,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:09:02,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:02,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:02,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:02,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:02,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:09:02,327 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 20:09:02,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879668769] [2020-10-27 20:09:02,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:02,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:02,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081304895] [2020-10-27 20:09:02,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:02,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:02,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:02,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:02,330 INFO L87 Difference]: Start difference. First operand 3657 states and 5704 transitions. Second operand 4 states. [2020-10-27 20:09:02,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:02,769 INFO L93 Difference]: Finished difference Result 6285 states and 9803 transitions. [2020-10-27 20:09:02,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:02,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 20:09:02,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:02,806 INFO L225 Difference]: With dead ends: 6285 [2020-10-27 20:09:02,807 INFO L226 Difference]: Without dead ends: 6282 [2020-10-27 20:09:02,811 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 20:09:02,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6282 states. [2020-10-27 20:09:03,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6282 to 5513. [2020-10-27 20:09:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5513 states. [2020-10-27 20:09:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 8392 transitions. [2020-10-27 20:09:03,081 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 8392 transitions. Word has length 29 [2020-10-27 20:09:03,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:03,081 INFO L481 AbstractCegarLoop]: Abstraction has 5513 states and 8392 transitions. [2020-10-27 20:09:03,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 8392 transitions. [2020-10-27 20:09:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:09:03,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:03,097 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 20:09:03,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 20:09:03,097 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:03,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1058837932, now seen corresponding path program 1 times [2020-10-27 20:09:03,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:03,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103148320] [2020-10-27 20:09:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:03,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:03,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:03,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:03,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:03,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:03,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:03,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:05,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:09:05,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:09:05,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1912 [2020-10-27 20:09:05,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:05,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:05,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 20:09:05,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:09:05,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:05,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:05,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:05,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:05,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:05,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:09:05,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:05,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:05,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:05,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:05,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:05,106 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 20:09:05,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103148320] [2020-10-27 20:09:05,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:05,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:05,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350409744] [2020-10-27 20:09:05,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:05,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:05,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:05,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:05,113 INFO L87 Difference]: Start difference. First operand 5513 states and 8392 transitions. Second operand 4 states. [2020-10-27 20:09:05,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:05,501 INFO L93 Difference]: Finished difference Result 12685 states and 19403 transitions. [2020-10-27 20:09:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:05,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 20:09:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:05,560 INFO L225 Difference]: With dead ends: 12685 [2020-10-27 20:09:05,560 INFO L226 Difference]: Without dead ends: 7178 [2020-10-27 20:09:05,576 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 20:09:05,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7178 states. [2020-10-27 20:09:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7178 to 7177. [2020-10-27 20:09:05,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7177 states. [2020-10-27 20:09:05,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 10760 transitions. [2020-10-27 20:09:05,949 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 10760 transitions. Word has length 29 [2020-10-27 20:09:05,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:05,949 INFO L481 AbstractCegarLoop]: Abstraction has 7177 states and 10760 transitions. [2020-10-27 20:09:05,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:05,949 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 10760 transitions. [2020-10-27 20:09:05,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:09:05,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:05,959 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 20:09:05,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 20:09:05,960 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:05,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:05,961 INFO L82 PathProgramCache]: Analyzing trace with hash -249216407, now seen corresponding path program 1 times [2020-10-27 20:09:05,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:05,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465851121] [2020-10-27 20:09:05,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:05,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:05,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:06,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:06,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:06,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:06,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:06,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:09,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:09,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:09:09,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:09:09,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3630 [2020-10-27 20:09:09,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:09,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:09,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:09:09,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:09:09,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:09,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:09,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:09,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:09,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:09,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:09,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:09:09,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:09,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:09,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:09,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:09,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:09,663 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 20:09:09,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465851121] [2020-10-27 20:09:09,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:09,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:09,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422888752] [2020-10-27 20:09:09,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:09,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:09,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:09,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:09,670 INFO L87 Difference]: Start difference. First operand 7177 states and 10760 transitions. Second operand 4 states. [2020-10-27 20:09:10,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:10,106 INFO L93 Difference]: Finished difference Result 12045 states and 17931 transitions. [2020-10-27 20:09:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:10,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 20:09:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:10,139 INFO L225 Difference]: With dead ends: 12045 [2020-10-27 20:09:10,139 INFO L226 Difference]: Without dead ends: 12042 [2020-10-27 20:09:10,146 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 20:09:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12042 states. [2020-10-27 20:09:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12042 to 11017. [2020-10-27 20:09:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11017 states. [2020-10-27 20:09:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11017 states to 11017 states and 16136 transitions. [2020-10-27 20:09:10,565 INFO L78 Accepts]: Start accepts. Automaton has 11017 states and 16136 transitions. Word has length 30 [2020-10-27 20:09:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:10,566 INFO L481 AbstractCegarLoop]: Abstraction has 11017 states and 16136 transitions. [2020-10-27 20:09:10,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 11017 states and 16136 transitions. [2020-10-27 20:09:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:09:10,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:10,624 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 20:09:10,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 20:09:10,625 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:10,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1260333657, now seen corresponding path program 1 times [2020-10-27 20:09:10,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:10,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294791293] [2020-10-27 20:09:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:10,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:10,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:11,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:13,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:13,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 20:09:13,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 20:09:13,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3219 [2020-10-27 20:09:13,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:13,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:13,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 20:09:13,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:09:13,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:13,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:13,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:13,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:13,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:13,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:13,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:09:13,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:13,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:13,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:13,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:13,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:13,901 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 20:09:13,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294791293] [2020-10-27 20:09:13,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:13,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:13,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616456916] [2020-10-27 20:09:13,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:13,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:13,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:13,905 INFO L87 Difference]: Start difference. First operand 11017 states and 16136 transitions. Second operand 4 states. [2020-10-27 20:09:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:14,496 INFO L93 Difference]: Finished difference Result 25101 states and 36875 transitions. [2020-10-27 20:09:14,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:14,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-27 20:09:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:14,523 INFO L225 Difference]: With dead ends: 25101 [2020-10-27 20:09:14,523 INFO L226 Difference]: Without dead ends: 14090 [2020-10-27 20:09:14,543 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 20:09:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14090 states. [2020-10-27 20:09:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14090 to 14089. [2020-10-27 20:09:15,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14089 states. [2020-10-27 20:09:15,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14089 states to 14089 states and 20232 transitions. [2020-10-27 20:09:15,101 INFO L78 Accepts]: Start accepts. Automaton has 14089 states and 20232 transitions. Word has length 30 [2020-10-27 20:09:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:15,101 INFO L481 AbstractCegarLoop]: Abstraction has 14089 states and 20232 transitions. [2020-10-27 20:09:15,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:15,101 INFO L276 IsEmpty]: Start isEmpty. Operand 14089 states and 20232 transitions. [2020-10-27 20:09:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:09:15,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:15,121 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 20:09:15,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 20:09:15,121 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:15,122 INFO L82 PathProgramCache]: Analyzing trace with hash 870918937, now seen corresponding path program 1 times [2020-10-27 20:09:15,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:15,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946647585] [2020-10-27 20:09:15,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:15,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:15,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:15,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:15,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:15,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:15,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:15,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:15,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:15,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:20,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:20,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:09:20,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:09:20,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 20:09:20,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:20,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:20,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:09:20,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 20:09:20,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:20,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:20,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:20,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:20,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:20,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:20,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:09:20,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:20,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:20,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:20,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:20,184 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 20:09:20,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946647585] [2020-10-27 20:09:20,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:20,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:20,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442848226] [2020-10-27 20:09:20,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:20,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:20,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:20,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:20,188 INFO L87 Difference]: Start difference. First operand 14089 states and 20232 transitions. Second operand 4 states. [2020-10-27 20:09:20,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:20,856 INFO L93 Difference]: Finished difference Result 41740 states and 59658 transitions. [2020-10-27 20:09:20,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:20,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 20:09:20,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:20,885 INFO L225 Difference]: With dead ends: 41740 [2020-10-27 20:09:20,886 INFO L226 Difference]: Without dead ends: 14089 [2020-10-27 20:09:20,935 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 20:09:20,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14089 states. [2020-10-27 20:09:21,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14089 to 14089. [2020-10-27 20:09:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14089 states. [2020-10-27 20:09:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14089 states to 14089 states and 19208 transitions. [2020-10-27 20:09:21,379 INFO L78 Accepts]: Start accepts. Automaton has 14089 states and 19208 transitions. Word has length 31 [2020-10-27 20:09:21,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:21,379 INFO L481 AbstractCegarLoop]: Abstraction has 14089 states and 19208 transitions. [2020-10-27 20:09:21,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 14089 states and 19208 transitions. [2020-10-27 20:09:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:09:21,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:09:21,398 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 20:09:21,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 20:09:21,398 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:09:21,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:09:21,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1882036187, now seen corresponding path program 1 times [2020-10-27 20:09:21,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:09:21,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042087006] [2020-10-27 20:09:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:09:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:21,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:21,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:22,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:26,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:09:26,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:09:26,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 20:09:26,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:09:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 20:09:26,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:09:26,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:26,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:09:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:09:26,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:09:26,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:09:26,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:09:26,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:09:26,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:09:26,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:09:26,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:09:26,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:09:26,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:09:26,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:09:26,476 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 20:09:26,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042087006] [2020-10-27 20:09:26,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:09:26,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:09:26,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889451262] [2020-10-27 20:09:26,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:09:26,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:09:26,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:09:26,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:09:26,478 INFO L87 Difference]: Start difference. First operand 14089 states and 19208 transitions. Second operand 4 states. [2020-10-27 20:09:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:09:26,783 INFO L93 Difference]: Finished difference Result 14089 states and 19208 transitions. [2020-10-27 20:09:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:09:26,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 20:09:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:09:26,785 INFO L225 Difference]: With dead ends: 14089 [2020-10-27 20:09:26,785 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 20:09:26,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 20:09:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 20:09:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 20:09:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 20:09:26,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 20:09:26,810 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-10-27 20:09:26,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:09:26,811 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 20:09:26,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:09:26,811 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 20:09:26,811 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 20:09:26,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 20:09:26,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 20:09:44,041 WARN L193 SmtUtils]: Spent 17.16 s on a formula simplification. DAG size of input: 2628 DAG size of output: 34 [2020-10-27 20:09:44,081 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-27 20:09:44,081 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-27 20:09:44,081 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-27 20:09:44,081 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-27 20:09:44,081 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:09:44,082 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-27 20:09:44,082 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:09:44,082 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:09:44,082 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 20:09:44,082 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 20:09:44,082 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:09:44,083 INFO L274 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-10-27 20:09:44,083 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 165) no Hoare annotation was computed. [2020-10-27 20:09:44,084 INFO L274 CegarLoopResult]: For program point L151(line 151) no Hoare annotation was computed. [2020-10-27 20:09:44,084 INFO L274 CegarLoopResult]: For program point L110-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,084 INFO L274 CegarLoopResult]: For program point L135-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,084 INFO L274 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-10-27 20:09:44,084 INFO L274 CegarLoopResult]: For program point L136(line 136) no Hoare annotation was computed. [2020-10-27 20:09:44,084 INFO L277 CegarLoopResult]: At program point L161(lines 7 165) the Hoare annotation is: true [2020-10-27 20:09:44,084 INFO L274 CegarLoopResult]: For program point L120-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,084 INFO L274 CegarLoopResult]: For program point L145-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,084 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 165) no Hoare annotation was computed. [2020-10-27 20:09:44,084 INFO L274 CegarLoopResult]: For program point L104-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,085 INFO L274 CegarLoopResult]: For program point L96-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,085 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 165) the Hoare annotation is: true [2020-10-27 20:09:44,085 INFO L274 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-10-27 20:09:44,085 INFO L274 CegarLoopResult]: For program point L88-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,085 INFO L274 CegarLoopResult]: For program point L146(line 146) no Hoare annotation was computed. [2020-10-27 20:09:44,085 INFO L274 CegarLoopResult]: For program point L80-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,085 INFO L274 CegarLoopResult]: For program point L72-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,086 INFO L274 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-10-27 20:09:44,086 INFO L274 CegarLoopResult]: For program point L130-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,086 INFO L277 CegarLoopResult]: At program point L155-1(lines 41 160) the Hoare annotation is: true [2020-10-27 20:09:44,086 INFO L274 CegarLoopResult]: For program point L131(line 131) no Hoare annotation was computed. [2020-10-27 20:09:44,086 INFO L274 CegarLoopResult]: For program point L156(line 156) no Hoare annotation was computed. [2020-10-27 20:09:44,086 INFO L270 CegarLoopResult]: At program point L156-1(lines 7 165) the Hoare annotation is: false [2020-10-27 20:09:44,086 INFO L274 CegarLoopResult]: For program point L115-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,086 INFO L274 CegarLoopResult]: For program point L140-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,086 INFO L274 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-10-27 20:09:44,087 INFO L274 CegarLoopResult]: For program point L141(line 141) no Hoare annotation was computed. [2020-10-27 20:09:44,087 INFO L274 CegarLoopResult]: For program point L100-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,087 INFO L274 CegarLoopResult]: For program point L125-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,087 INFO L274 CegarLoopResult]: For program point L92-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,087 INFO L274 CegarLoopResult]: For program point L150-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,087 INFO L274 CegarLoopResult]: For program point L84-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,087 INFO L274 CegarLoopResult]: For program point L43(lines 43 45) no Hoare annotation was computed. [2020-10-27 20:09:44,087 INFO L274 CegarLoopResult]: For program point L76-1(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,087 INFO L274 CegarLoopResult]: For program point L68(lines 68 70) no Hoare annotation was computed. [2020-10-27 20:09:44,087 INFO L274 CegarLoopResult]: For program point L68-2(lines 41 160) no Hoare annotation was computed. [2020-10-27 20:09:44,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:09:44 BoogieIcfgContainer [2020-10-27 20:09:44,101 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:09:44,107 INFO L168 Benchmark]: Toolchain (without parser) took 56255.24 ms. Allocated memory was 151.0 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 125.4 MB in the beginning and 584.2 MB in the end (delta: -458.7 MB). Peak memory consumption was 891.8 MB. Max. memory is 8.0 GB. [2020-10-27 20:09:44,112 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:09:44,115 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.68 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 114.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-27 20:09:44,116 INFO L168 Benchmark]: Boogie Preprocessor took 79.18 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 112.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:09:44,117 INFO L168 Benchmark]: RCFGBuilder took 502.64 ms. Allocated memory is still 151.0 MB. Free memory was 112.8 MB in the beginning and 129.7 MB in the end (delta: -16.9 MB). Peak memory consumption was 19.8 MB. Max. memory is 8.0 GB. [2020-10-27 20:09:44,118 INFO L168 Benchmark]: TraceAbstraction took 55356.35 ms. Allocated memory was 151.0 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 129.2 MB in the beginning and 584.2 MB in the end (delta: -455.0 MB). Peak memory consumption was 895.1 MB. Max. memory is 8.0 GB. [2020-10-27 20:09:44,127 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 300.68 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 114.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 79.18 ms. Allocated memory is still 151.0 MB. Free memory was 114.6 MB in the beginning and 112.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 502.64 ms. Allocated memory is still 151.0 MB. Free memory was 112.8 MB in the beginning and 129.7 MB in the end (delta: -16.9 MB). Peak memory consumption was 19.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 55356.35 ms. Allocated memory was 151.0 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 129.2 MB in the beginning and 584.2 MB in the end (delta: -455.0 MB). Peak memory consumption was 895.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 49 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 37.9s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 17.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1642 SDtfs, 2512 SDslu, 153 SDs, 0 SdLazy, 1222 SolverSat, 77 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14089occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.8s AutomataMinimizationTime, 20 MinimizatonAttempts, 3066 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 27 PreInvPairs, 1053 NumberOfFragments, 38 HoareAnnotationTreeSize, 27 FomulaSimplifications, 26801157 FormulaSimplificationTreeSizeReduction, 17.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 27.7s InterpolantComputationTime, 530 NumberOfCodeBlocks, 530 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 510 ConstructedInterpolants, 0 QuantifiedInterpolants, 39180 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...