/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=SHALLOWEST --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/psyco/psyco_net_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 03:55:45,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 03:55:45,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 03:55:45,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 03:55:45,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 03:55:45,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 03:55:45,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 03:55:45,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 03:55:45,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 03:55:45,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 03:55:45,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 03:55:45,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 03:55:45,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 03:55:45,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 03:55:45,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 03:55:45,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 03:55:45,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 03:55:45,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 03:55:45,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 03:55:45,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 03:55:45,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 03:55:45,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 03:55:45,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 03:55:45,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 03:55:45,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 03:55:45,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 03:55:45,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 03:55:45,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 03:55:45,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 03:55:45,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 03:55:45,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 03:55:45,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 03:55:45,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 03:55:45,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 03:55:45,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 03:55:45,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 03:55:45,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 03:55:45,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 03:55:45,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 03:55:45,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 03:55:45,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 03:55:45,335 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 03:55:45,366 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 03:55:45,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 03:55:45,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 03:55:45,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 03:55:45,368 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 03:55:45,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 03:55:45,369 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 03:55:45,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 03:55:45,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 03:55:45,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 03:55:45,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 03:55:45,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 03:55:45,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 03:55:45,370 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 03:55:45,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 03:55:45,370 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 03:55:45,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 03:55:45,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 03:55:45,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 03:55:45,371 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 03:55:45,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 03:55:45,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 03:55:45,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 03:55:45,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 03:55:45,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 03:55:45,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 03:55:45,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 03:55:45,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 03:55:45,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 03:55:45,373 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 03:55:45,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 03:55:45,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 03:55:45,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 03:55:45,764 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 03:55:45,765 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 03:55:45,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_net_1.c [2020-10-27 03:55:45,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c11fbdcbc/0bd3024b4aa94fcbb62fccaf8996c7fa/FLAGd5ad06110 [2020-10-27 03:55:47,415 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 03:55:47,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/psyco/psyco_net_1.c [2020-10-27 03:55:47,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c11fbdcbc/0bd3024b4aa94fcbb62fccaf8996c7fa/FLAGd5ad06110 [2020-10-27 03:55:47,738 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c11fbdcbc/0bd3024b4aa94fcbb62fccaf8996c7fa [2020-10-27 03:55:47,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 03:55:47,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 03:55:47,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 03:55:47,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 03:55:47,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 03:55:47,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:55:47" (1/1) ... [2020-10-27 03:55:47,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478bda4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:55:47, skipping insertion in model container [2020-10-27 03:55:47,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:55:47" (1/1) ... [2020-10-27 03:55:47,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 03:55:48,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 03:55:50,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 03:55:50,253 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 03:55:51,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 03:55:51,686 INFO L208 MainTranslator]: Completed translation [2020-10-27 03:55:51,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:55:51 WrapperNode [2020-10-27 03:55:51,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 03:55:51,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 03:55:51,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 03:55:51,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 03:55:51,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:55:51" (1/1) ... [2020-10-27 03:55:51,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:55:51" (1/1) ... [2020-10-27 03:55:51,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:55:51" (1/1) ... [2020-10-27 03:55:51,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:55:51" (1/1) ... [2020-10-27 03:55:52,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:55:51" (1/1) ... [2020-10-27 03:55:52,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:55:51" (1/1) ... [2020-10-27 03:55:53,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:55:51" (1/1) ... [2020-10-27 03:55:53,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 03:55:53,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 03:55:53,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 03:55:53,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 03:55:53,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:55:51" (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 03:55:53,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 03:55:53,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 03:55:53,370 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 03:55:53,370 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 03:55:53,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 03:55:53,370 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 03:55:53,370 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 03:55:53,371 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 03:55:53,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 03:55:53,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 03:55:53,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 03:55:53,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 03:55:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 03:55:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 03:55:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 03:55:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 03:56:17,423 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 03:56:17,424 INFO L298 CfgBuilder]: Removed 1130 assume(true) statements. [2020-10-27 03:56:17,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:56:17 BoogieIcfgContainer [2020-10-27 03:56:17,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 03:56:17,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 03:56:17,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 03:56:17,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 03:56:17,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:55:47" (1/3) ... [2020-10-27 03:56:17,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1f4c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:56:17, skipping insertion in model container [2020-10-27 03:56:17,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:55:51" (2/3) ... [2020-10-27 03:56:17,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1f4c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:56:17, skipping insertion in model container [2020-10-27 03:56:17,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:56:17" (3/3) ... [2020-10-27 03:56:17,444 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_net_1.c [2020-10-27 03:56:17,455 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 03:56:17,464 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 03:56:17,478 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 03:56:17,533 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 03:56:17,533 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 03:56:17,533 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 03:56:17,533 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 03:56:17,533 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 03:56:17,534 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 03:56:17,534 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 03:56:17,534 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 03:56:17,673 INFO L276 IsEmpty]: Start isEmpty. Operand 9220 states. [2020-10-27 03:56:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 03:56:17,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 03:56:17,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 03:56:17,680 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 03:56:17,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 03:56:17,687 INFO L82 PathProgramCache]: Analyzing trace with hash -782733704, now seen corresponding path program 1 times [2020-10-27 03:56:17,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 03:56:17,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203314613] [2020-10-27 03:56:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 03:56:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:56:18,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:56:18,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:56:18,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 03:56:18,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:56:18,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 305 [2020-10-27 03:56:18,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:56:18,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 03:56:18,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 03:56:18,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 03:56:18,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-27 03:56:18,561 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 03:56:18,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 03:56:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:56:18,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:56:18,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:56:18,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 03:56:18,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:56:18,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 03:56:18,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:56:18,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 03:56:18,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 03:56:18,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 03:56:18,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 03:56:18,636 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 03:56:18,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203314613] [2020-10-27 03:56:18,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 03:56:18,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 03:56:18,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242083255] [2020-10-27 03:56:18,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 03:56:18,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 03:56:18,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 03:56:18,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 03:56:18,669 INFO L87 Difference]: Start difference. First operand 9220 states. Second operand 3 states. [2020-10-27 03:56:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 03:56:19,425 INFO L93 Difference]: Finished difference Result 17709 states and 35392 transitions. [2020-10-27 03:56:19,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 03:56:19,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-27 03:56:19,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 03:56:19,507 INFO L225 Difference]: With dead ends: 17709 [2020-10-27 03:56:19,508 INFO L226 Difference]: Without dead ends: 8285 [2020-10-27 03:56:19,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 03:56:19,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8285 states. [2020-10-27 03:56:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8285 to 8285. [2020-10-27 03:56:19,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8285 states. [2020-10-27 03:56:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8285 states to 8285 states and 13002 transitions. [2020-10-27 03:56:19,881 INFO L78 Accepts]: Start accepts. Automaton has 8285 states and 13002 transitions. Word has length 14 [2020-10-27 03:56:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 03:56:19,882 INFO L481 AbstractCegarLoop]: Abstraction has 8285 states and 13002 transitions. [2020-10-27 03:56:19,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 03:56:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8285 states and 13002 transitions. [2020-10-27 03:56:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 03:56:19,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 03:56:19,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 03:56:19,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 03:56:19,886 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 03:56:19,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 03:56:19,887 INFO L82 PathProgramCache]: Analyzing trace with hash 788089820, now seen corresponding path program 1 times [2020-10-27 03:56:19,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 03:56:19,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288173531] [2020-10-27 03:56:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 03:56:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:56:19,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:56:20,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:56:20,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:56:20,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 03:56:20,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 03:56:20,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-27 03:56:20,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:56:20,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 03:56:20,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 03:56:20,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 03:56:20,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 03:56:20,649 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 03:56:20,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 03:56:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:56:20,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:56:20,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:56:20,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 03:56:20,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:56:20,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 03:56:20,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:56:20,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 03:56:20,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 03:56:20,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 03:56:20,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 03:56:20,712 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 03:56:20,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288173531] [2020-10-27 03:56:20,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 03:56:20,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 03:56:20,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703260384] [2020-10-27 03:56:20,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 03:56:20,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 03:56:20,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 03:56:20,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 03:56:20,732 INFO L87 Difference]: Start difference. First operand 8285 states and 13002 transitions. Second operand 4 states. [2020-10-27 03:56:21,291 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 03:57:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 03:57:17,291 INFO L93 Difference]: Finished difference Result 16567 states and 26002 transitions. [2020-10-27 03:57:17,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 03:57:17,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 03:57:17,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 03:57:17,343 INFO L225 Difference]: With dead ends: 16567 [2020-10-27 03:57:17,343 INFO L226 Difference]: Without dead ends: 8288 [2020-10-27 03:57:17,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 03:57:17,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8288 states. [2020-10-27 03:57:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8288 to 8288. [2020-10-27 03:57:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8288 states. [2020-10-27 03:57:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13005 transitions. [2020-10-27 03:57:17,568 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13005 transitions. Word has length 15 [2020-10-27 03:57:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 03:57:17,569 INFO L481 AbstractCegarLoop]: Abstraction has 8288 states and 13005 transitions. [2020-10-27 03:57:17,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 03:57:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13005 transitions. [2020-10-27 03:57:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 03:57:17,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 03:57:17,571 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 03:57:17,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 03:57:17,571 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 03:57:17,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 03:57:17,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1563134581, now seen corresponding path program 1 times [2020-10-27 03:57:17,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 03:57:17,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677783413] [2020-10-27 03:57:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 03:57:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:57:17,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:57:17,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:57:17,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 03:57:17,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:57:17,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-27 03:57:17,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:57:17,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 03:57:17,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 03:57:17,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 03:57:17,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 03:57:18,202 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 03:57:18,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 03:57:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:57:18,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:57:18,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:57:18,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 03:57:18,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:57:18,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 03:57:18,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:57:18,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 03:57:18,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 03:57:18,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 03:57:18,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 03:57:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 03:57:18,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677783413] [2020-10-27 03:57:18,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 03:57:18,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 03:57:18,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842181473] [2020-10-27 03:57:18,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 03:57:18,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 03:57:18,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 03:57:18,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 03:57:18,249 INFO L87 Difference]: Start difference. First operand 8288 states and 13005 transitions. Second operand 4 states. [2020-10-27 03:57:18,617 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 03:57:25,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 03:57:25,327 INFO L93 Difference]: Finished difference Result 16462 states and 25851 transitions. [2020-10-27 03:57:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 03:57:25,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 03:57:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 03:57:25,372 INFO L225 Difference]: With dead ends: 16462 [2020-10-27 03:57:25,372 INFO L226 Difference]: Without dead ends: 8181 [2020-10-27 03:57:25,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 03:57:25,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8181 states. [2020-10-27 03:57:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8181 to 8181. [2020-10-27 03:57:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8181 states. [2020-10-27 03:57:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8181 states to 8181 states and 12851 transitions. [2020-10-27 03:57:25,571 INFO L78 Accepts]: Start accepts. Automaton has 8181 states and 12851 transitions. Word has length 20 [2020-10-27 03:57:25,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 03:57:25,572 INFO L481 AbstractCegarLoop]: Abstraction has 8181 states and 12851 transitions. [2020-10-27 03:57:25,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 03:57:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 8181 states and 12851 transitions. [2020-10-27 03:57:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 03:57:25,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 03:57:25,577 INFO L422 BasicCegarLoop]: trace histogram [2, 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 03:57:25,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 03:57:25,577 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 03:57:25,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 03:57:25,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1307147288, now seen corresponding path program 1 times [2020-10-27 03:57:25,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 03:57:25,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452915715] [2020-10-27 03:57:25,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 03:57:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:57:25,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:57:25,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:57:25,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 03:57:25,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:57:25,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 03:57:25,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:57:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 03:57:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 03:57:25,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 03:57:25,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 03:57:26,302 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 03:57:26,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 03:57:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:57:26,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:57:26,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:57:26,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 03:57:26,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:57:26,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 03:57:26,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:57:26,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 03:57:26,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 03:57:26,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 03:57:26,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 03:57:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 03:57:26,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452915715] [2020-10-27 03:57:26,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 03:57:26,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 03:57:26,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648859476] [2020-10-27 03:57:26,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 03:57:26,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 03:57:26,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 03:57:26,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 03:57:26,366 INFO L87 Difference]: Start difference. First operand 8181 states and 12851 transitions. Second operand 4 states. [2020-10-27 03:57:26,831 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 03:57:42,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 03:57:42,304 INFO L93 Difference]: Finished difference Result 16270 states and 25569 transitions. [2020-10-27 03:57:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 03:57:42,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-27 03:57:42,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 03:57:42,324 INFO L225 Difference]: With dead ends: 16270 [2020-10-27 03:57:42,324 INFO L226 Difference]: Without dead ends: 8061 [2020-10-27 03:57:42,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 03:57:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2020-10-27 03:57:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 8061. [2020-10-27 03:57:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8061 states. [2020-10-27 03:57:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8061 states to 8061 states and 12231 transitions. [2020-10-27 03:57:42,497 INFO L78 Accepts]: Start accepts. Automaton has 8061 states and 12231 transitions. Word has length 24 [2020-10-27 03:57:42,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 03:57:42,498 INFO L481 AbstractCegarLoop]: Abstraction has 8061 states and 12231 transitions. [2020-10-27 03:57:42,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 03:57:42,498 INFO L276 IsEmpty]: Start isEmpty. Operand 8061 states and 12231 transitions. [2020-10-27 03:57:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 03:57:42,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 03:57:42,500 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 03:57:42,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 03:57:42,500 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 03:57:42,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 03:57:42,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1836183002, now seen corresponding path program 1 times [2020-10-27 03:57:42,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 03:57:42,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753907350] [2020-10-27 03:57:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 03:57:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:57:42,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:57:42,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:57:42,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:57:42,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 03:57:42,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 03:57:42,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-27 03:57:42,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:57:42,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 03:57:42,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 03:57:42,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 03:57:42,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 03:57:43,286 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 03:57:43,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 03:57:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:57:43,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:57:43,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:57:43,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 03:57:43,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:57:43,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 03:57:43,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:57:43,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 03:57:43,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 03:57:43,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 03:57:43,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 03:57:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 03:57:43,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753907350] [2020-10-27 03:57:43,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 03:57:43,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 03:57:43,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172313381] [2020-10-27 03:57:43,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 03:57:43,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 03:57:43,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 03:57:43,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 03:57:43,322 INFO L87 Difference]: Start difference. First operand 8061 states and 12231 transitions. Second operand 4 states. [2020-10-27 03:57:43,699 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 03:58:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 03:58:36,338 INFO L93 Difference]: Finished difference Result 16155 states and 24534 transitions. [2020-10-27 03:58:36,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 03:58:36,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-27 03:58:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 03:58:36,365 INFO L225 Difference]: With dead ends: 16155 [2020-10-27 03:58:36,365 INFO L226 Difference]: Without dead ends: 8106 [2020-10-27 03:58:36,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 03:58:36,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8106 states. [2020-10-27 03:58:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8106 to 8105. [2020-10-27 03:58:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8105 states. [2020-10-27 03:58:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8105 states to 8105 states and 12276 transitions. [2020-10-27 03:58:36,543 INFO L78 Accepts]: Start accepts. Automaton has 8105 states and 12276 transitions. Word has length 27 [2020-10-27 03:58:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 03:58:36,543 INFO L481 AbstractCegarLoop]: Abstraction has 8105 states and 12276 transitions. [2020-10-27 03:58:36,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 03:58:36,543 INFO L276 IsEmpty]: Start isEmpty. Operand 8105 states and 12276 transitions. [2020-10-27 03:58:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 03:58:36,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 03:58:36,544 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 03:58:36,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 03:58:36,545 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 03:58:36,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 03:58:36,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1055385208, now seen corresponding path program 1 times [2020-10-27 03:58:36,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 03:58:36,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84466918] [2020-10-27 03:58:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 03:58:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:58:36,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:58:36,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:58:36,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 03:58:36,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:58:36,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-27 03:58:36,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:58:36,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 03:58:36,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 03:58:36,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 03:58:36,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 03:58:37,112 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 03:58:37,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 03:58:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:58:37,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:58:37,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:58:37,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 03:58:37,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:58:37,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 03:58:37,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:58:37,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 03:58:37,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 03:58:37,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 03:58:37,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 03:58:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 03:58:37,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84466918] [2020-10-27 03:58:37,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 03:58:37,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 03:58:37,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461496421] [2020-10-27 03:58:37,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 03:58:37,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 03:58:37,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 03:58:37,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 03:58:37,155 INFO L87 Difference]: Start difference. First operand 8105 states and 12276 transitions. Second operand 4 states. [2020-10-27 03:58:37,512 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 03:59:42,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 03:59:42,148 INFO L93 Difference]: Finished difference Result 24289 states and 36801 transitions. [2020-10-27 03:59:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 03:59:42,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-27 03:59:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 03:59:42,189 INFO L225 Difference]: With dead ends: 24289 [2020-10-27 03:59:42,189 INFO L226 Difference]: Without dead ends: 16148 [2020-10-27 03:59:42,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 03:59:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16148 states. [2020-10-27 03:59:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16148 to 14891. [2020-10-27 03:59:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14891 states. [2020-10-27 03:59:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14891 states to 14891 states and 23129 transitions. [2020-10-27 03:59:42,504 INFO L78 Accepts]: Start accepts. Automaton has 14891 states and 23129 transitions. Word has length 28 [2020-10-27 03:59:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 03:59:42,505 INFO L481 AbstractCegarLoop]: Abstraction has 14891 states and 23129 transitions. [2020-10-27 03:59:42,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 03:59:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 14891 states and 23129 transitions. [2020-10-27 03:59:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 03:59:42,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 03:59:42,506 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 03:59:42,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 03:59:42,506 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 03:59:42,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 03:59:42,507 INFO L82 PathProgramCache]: Analyzing trace with hash 779196631, now seen corresponding path program 1 times [2020-10-27 03:59:42,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 03:59:42,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78267240] [2020-10-27 03:59:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 03:59:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:59:42,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:59:42,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:59:42,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 03:59:42,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:59:42,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-27 03:59:42,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:59:42,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 03:59:42,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 03:59:42,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 03:59:42,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 03:59:43,045 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 03:59:43,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 03:59:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:59:43,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:59:43,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:59:43,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 03:59:43,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:59:43,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 03:59:43,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:59:43,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 03:59:43,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 03:59:43,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 03:59:43,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 03:59:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 03:59:43,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78267240] [2020-10-27 03:59:43,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 03:59:43,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 03:59:43,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808736662] [2020-10-27 03:59:43,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 03:59:43,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 03:59:43,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 03:59:43,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 03:59:43,100 INFO L87 Difference]: Start difference. First operand 14891 states and 23129 transitions. Second operand 4 states. [2020-10-27 03:59:43,436 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 204