/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/loops-crafted-1/Mono5_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:27:01,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:27:01,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:27:01,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:27:01,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:27:01,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:27:01,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:27:01,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:27:01,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:27:01,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:27:01,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:27:01,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:27:01,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:27:01,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:27:01,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:27:01,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:27:01,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:27:01,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:27:01,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:27:01,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:27:01,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:27:01,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:27:01,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:27:01,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:27:01,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:27:01,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:27:01,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:27:01,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:27:01,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:27:01,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:27:01,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:27:01,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:27:01,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:27:01,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:27:01,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:27:01,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:27:01,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:27:01,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:27:01,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:27:01,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:27:01,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:27:01,999 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 20:27:02,050 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:27:02,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:27:02,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:27:02,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:27:02,052 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:27:02,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:27:02,053 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:27:02,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:27:02,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:27:02,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:27:02,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:27:02,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:27:02,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:27:02,054 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:27:02,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:27:02,055 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:27:02,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:27:02,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:27:02,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:27:02,056 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:27:02,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:27:02,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:27:02,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:27:02,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:27:02,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:27:02,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:27:02,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:27:02,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:27:02,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:27:02,058 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:27:02,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:27:02,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:27:02,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:27:02,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:27:02,467 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:27:02,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2020-10-27 20:27:02,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/077d167dd/7f2d507f2ffb4caab666c521ec09e019/FLAGc7fd5e2c1 [2020-10-27 20:27:03,074 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:27:03,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2020-10-27 20:27:03,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/077d167dd/7f2d507f2ffb4caab666c521ec09e019/FLAGc7fd5e2c1 [2020-10-27 20:27:03,461 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/077d167dd/7f2d507f2ffb4caab666c521ec09e019 [2020-10-27 20:27:03,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:27:03,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:27:03,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:27:03,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:27:03,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:27:03,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:27:03" (1/1) ... [2020-10-27 20:27:03,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4351d0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:03, skipping insertion in model container [2020-10-27 20:27:03,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:27:03" (1/1) ... [2020-10-27 20:27:03,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:27:03,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:27:03,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:27:03,681 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:27:03,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:27:03,713 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:27:03,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:03 WrapperNode [2020-10-27 20:27:03,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:27:03,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:27:03,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:27:03,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:27:03,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:03" (1/1) ... [2020-10-27 20:27:03,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:03" (1/1) ... [2020-10-27 20:27:03,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:03" (1/1) ... [2020-10-27 20:27:03,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:03" (1/1) ... [2020-10-27 20:27:03,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:03" (1/1) ... [2020-10-27 20:27:03,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:03" (1/1) ... [2020-10-27 20:27:03,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:03" (1/1) ... [2020-10-27 20:27:03,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:27:03,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:27:03,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:27:03,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:27:03,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:03" (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 20:27:03,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:27:03,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:27:03,877 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:27:03,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:27:03,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:27:03,879 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:27:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:27:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:27:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:27:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:27:03,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:27:03,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:27:03,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:27:03,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:27:03,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:27:03,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:27:03,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:27:04,322 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:27:04,323 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:27:04,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:27:04 BoogieIcfgContainer [2020-10-27 20:27:04,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:27:04,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:27:04,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:27:04,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:27:04,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:27:03" (1/3) ... [2020-10-27 20:27:04,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75537b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:27:04, skipping insertion in model container [2020-10-27 20:27:04,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:27:03" (2/3) ... [2020-10-27 20:27:04,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75537b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:27:04, skipping insertion in model container [2020-10-27 20:27:04,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:27:04" (3/3) ... [2020-10-27 20:27:04,338 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono5_1.c [2020-10-27 20:27:04,350 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:27:04,360 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:27:04,375 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:27:04,419 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:27:04,419 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:27:04,419 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:27:04,419 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:27:04,419 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:27:04,420 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:27:04,420 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:27:04,420 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:27:04,445 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-27 20:27:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:27:04,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:04,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:04,454 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:04,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:04,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1441742757, now seen corresponding path program 1 times [2020-10-27 20:27:04,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:04,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845618777] [2020-10-27 20:27:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:04,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:04,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:05,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:05,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:27:05,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:27:05,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-27 20:27:05,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:27:05,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:05,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:27:05,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:05,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:05,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:05,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:05,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:05,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 20:27:05,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:05,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:05,246 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 20:27:05,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845618777] [2020-10-27 20:27:05,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:27:05,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:27:05,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686209220] [2020-10-27 20:27:05,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:27:05,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:05,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:27:05,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:27:05,283 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-27 20:27:05,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:05,358 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-10-27 20:27:05,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:27:05,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 20:27:05,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:05,377 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:27:05,377 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:27:05,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:27:05,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:27:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:27:05,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:27:05,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-27 20:27:05,425 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-27 20:27:05,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:05,425 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-27 20:27:05,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:27:05,426 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-27 20:27:05,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 20:27:05,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:05,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:05,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:27:05,427 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:05,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:05,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1126822096, now seen corresponding path program 1 times [2020-10-27 20:27:05,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:05,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649040695] [2020-10-27 20:27:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:05,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:05,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:05,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:05,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 20:27:05,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:27:05,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-27 20:27:05,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:05,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:27:05,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:05,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 20:27:05,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:05,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:05,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:05,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:05,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:05,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:05,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 20:27:05,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:05,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:05,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:05,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 20:27:05,764 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 20:27:05,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649040695] [2020-10-27 20:27:05,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:27:05,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 20:27:05,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697122417] [2020-10-27 20:27:05,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:27:05,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:05,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:27:05,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:27:05,780 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-10-27 20:27:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:06,043 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-27 20:27:06,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:27:06,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 20:27:06,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:06,045 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:27:06,046 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 20:27:06,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:27:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 20:27:06,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 20:27:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:27:06,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-27 20:27:06,064 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2020-10-27 20:27:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:06,064 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-27 20:27:06,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:27:06,065 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-27 20:27:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:27:06,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:06,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:06,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:27:06,066 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:06,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:06,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1794150295, now seen corresponding path program 1 times [2020-10-27 20:27:06,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:06,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480336756] [2020-10-27 20:27:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:06,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:06,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:06,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:06,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:27:06,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:27:06,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-27 20:27:06,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:27:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:06,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 20:27:06,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:06,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:06,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:06,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:06,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:06,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:06,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 20:27:06,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:06,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:06,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:06,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:06,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:27:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:06,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480336756] [2020-10-27 20:27:06,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:27:06,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:27:06,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775123637] [2020-10-27 20:27:06,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:27:06,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:06,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:27:06,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:27:06,458 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-10-27 20:27:06,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:06,561 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-27 20:27:06,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:27:06,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 20:27:06,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:06,563 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:27:06,563 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:27:06,564 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 20:27:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:27:06,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 20:27:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:27:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-27 20:27:06,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-27 20:27:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:06,572 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-27 20:27:06,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:27:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-27 20:27:06,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 20:27:06,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:06,573 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:06,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:27:06,574 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:06,574 INFO L82 PathProgramCache]: Analyzing trace with hash 550798258, now seen corresponding path program 1 times [2020-10-27 20:27:06,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:06,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125603200] [2020-10-27 20:27:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:06,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:06,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:06,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:06,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:06,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 20:27:06,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 20:27:06,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-27 20:27:06,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:06,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:27:06,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:06,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 20:27:06,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:07,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:07,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:07,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:07,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:07,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:07,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:27:07,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:07,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:07,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:07,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:07,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:27:07,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125603200] [2020-10-27 20:27:07,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:07,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:27:07,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69682349] [2020-10-27 20:27:07,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:27:07,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:07,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:27:07,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:27:07,102 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2020-10-27 20:27:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:07,328 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-27 20:27:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:27:07,329 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 20:27:07,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:07,330 INFO L225 Difference]: With dead ends: 29 [2020-10-27 20:27:07,330 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:27:07,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:27:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:27:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 20:27:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 20:27:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-27 20:27:07,337 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-27 20:27:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:07,338 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-27 20:27:07,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:27:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-27 20:27:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:27:07,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:07,339 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:07,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:27:07,339 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:07,340 INFO L82 PathProgramCache]: Analyzing trace with hash 569006663, now seen corresponding path program 2 times [2020-10-27 20:27:07,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:07,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574699805] [2020-10-27 20:27:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:07,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:07,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:07,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:07,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:07,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:07,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:27:07,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 20:27:07,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-10-27 20:27:07,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:07,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:27:07,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:07,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 20:27:07,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:07,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:07,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:07,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:07,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:07,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:07,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:27:07,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:07,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:07,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:07,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:07,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:27:08,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574699805] [2020-10-27 20:27:08,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:08,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:27:08,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309378313] [2020-10-27 20:27:08,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:27:08,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:08,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:27:08,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:27:08,005 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-10-27 20:27:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:08,170 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-27 20:27:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:27:08,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 20:27:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:08,172 INFO L225 Difference]: With dead ends: 42 [2020-10-27 20:27:08,172 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 20:27:08,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:27:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 20:27:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-27 20:27:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 20:27:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-27 20:27:08,180 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-10-27 20:27:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:08,180 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-27 20:27:08,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:27:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-27 20:27:08,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:27:08,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:08,182 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:08,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:27:08,182 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:08,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:08,183 INFO L82 PathProgramCache]: Analyzing trace with hash 808296871, now seen corresponding path program 3 times [2020-10-27 20:27:08,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:08,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315269583] [2020-10-27 20:27:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:08,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:08,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:08,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:08,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:08,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:10,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:10,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:27:10,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 20:27:10,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2753 [2020-10-27 20:27:10,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:10,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:27:10,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:10,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:27:10,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:11,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:11,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:11,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:11,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:11,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:11,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:11,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:11,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:11,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:11,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:11,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:27:11,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315269583] [2020-10-27 20:27:11,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:11,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:27:11,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741616997] [2020-10-27 20:27:11,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:27:11,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:11,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:27:11,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:27:11,066 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2020-10-27 20:27:11,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:11,285 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-10-27 20:27:11,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:27:11,285 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 20:27:11,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:11,286 INFO L225 Difference]: With dead ends: 45 [2020-10-27 20:27:11,286 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 20:27:11,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:27:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 20:27:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-27 20:27:11,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:27:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-27 20:27:11,294 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-10-27 20:27:11,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:11,295 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-27 20:27:11,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:27:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-27 20:27:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 20:27:11,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:11,296 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:11,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:27:11,296 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:11,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:11,297 INFO L82 PathProgramCache]: Analyzing trace with hash -112521360, now seen corresponding path program 4 times [2020-10-27 20:27:11,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:11,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312051883] [2020-10-27 20:27:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:11,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:11,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:11,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:11,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:11,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:11,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:12,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:15,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:15,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 20:27:15,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 20:27:15,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4294 [2020-10-27 20:27:15,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:15,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:27:15,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:15,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 20:27:15,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:15,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:15,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:15,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:15,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:15,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:15,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:15,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:15,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:15,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:15,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 20:27:15,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312051883] [2020-10-27 20:27:15,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:15,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:27:15,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914938947] [2020-10-27 20:27:15,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:27:15,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:15,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:27:15,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:27:15,904 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-10-27 20:27:16,347 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 20:27:16,515 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-27 20:27:16,679 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-27 20:27:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:28,048 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2020-10-27 20:27:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:27:28,049 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-27 20:27:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:28,052 INFO L225 Difference]: With dead ends: 61 [2020-10-27 20:27:28,052 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 20:27:28,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=130, Invalid=249, Unknown=1, NotChecked=0, Total=380 [2020-10-27 20:27:28,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 20:27:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2020-10-27 20:27:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 20:27:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-27 20:27:28,064 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2020-10-27 20:27:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:28,065 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-27 20:27:28,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:27:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-27 20:27:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 20:27:28,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:28,066 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:28,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:27:28,067 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:28,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:28,067 INFO L82 PathProgramCache]: Analyzing trace with hash -616381232, now seen corresponding path program 5 times [2020-10-27 20:27:28,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:28,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190934360] [2020-10-27 20:27:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:28,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:28,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:28,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:28,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:28,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:28,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:29,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:29,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:29,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:33,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:33,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 20:27:33,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 20:27:33,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 20:27:33,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:33,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:27:33,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:33,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:27:33,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:33,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:33,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:33,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:33,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:33,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:33,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:33,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:33,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 45 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 20:27:33,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190934360] [2020-10-27 20:27:33,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:33,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:27:33,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447814164] [2020-10-27 20:27:33,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:27:33,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:33,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:27:33,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:27:33,253 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 9 states. [2020-10-27 20:27:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:33,621 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-10-27 20:27:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:27:33,621 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-27 20:27:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:33,622 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:27:33,622 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 20:27:33,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:27:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 20:27:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-27 20:27:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 20:27:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-27 20:27:33,639 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 36 [2020-10-27 20:27:33,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:33,641 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-27 20:27:33,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:27:33,641 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-27 20:27:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 20:27:33,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:33,644 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:33,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:27:33,644 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:33,645 INFO L82 PathProgramCache]: Analyzing trace with hash 702271856, now seen corresponding path program 6 times [2020-10-27 20:27:33,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:33,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912079994] [2020-10-27 20:27:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:33,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:33,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:33,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:33,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:33,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:34,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:34,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:34,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:35,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:37,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:38,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:38,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 20:27:38,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 20:27:38,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 20:27:38,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:38,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:27:38,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:38,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 20:27:38,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:39,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:39,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:39,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:39,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:39,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:39,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:27:39,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:39,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:39,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:39,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-27 20:27:39,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912079994] [2020-10-27 20:27:39,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:39,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:27:39,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607153963] [2020-10-27 20:27:39,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:27:39,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:39,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:27:39,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:27:39,024 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 10 states. [2020-10-27 20:27:39,842 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-27 20:27:40,015 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-27 20:27:40,243 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-27 20:27:40,408 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-27 20:27:40,609 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-27 20:27:40,849 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-27 20:27:43,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:43,432 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-10-27 20:27:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 20:27:43,433 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-27 20:27:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:43,434 INFO L225 Difference]: With dead ends: 64 [2020-10-27 20:27:43,434 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 20:27:43,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=181, Invalid=370, Unknown=1, NotChecked=0, Total=552 [2020-10-27 20:27:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 20:27:43,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2020-10-27 20:27:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 20:27:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-27 20:27:43,460 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 42 [2020-10-27 20:27:43,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:43,460 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-27 20:27:43,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:27:43,460 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-27 20:27:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 20:27:43,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:43,461 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:43,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:27:43,462 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:43,464 INFO L82 PathProgramCache]: Analyzing trace with hash -891663415, now seen corresponding path program 7 times [2020-10-27 20:27:43,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:43,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202848385] [2020-10-27 20:27:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:43,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:43,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:43,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:43,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:43,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:44,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:44,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:44,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:44,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:44,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:44,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:48,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 20:27:48,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 20:27:48,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 20:27:48,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:48,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 20:27:48,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:48,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 20:27:48,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:48,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:48,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:48,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:48,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:48,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:48,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:48,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:48,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:48,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:48,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:48,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 48 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 20:27:48,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202848385] [2020-10-27 20:27:48,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:48,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 20:27:48,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959901552] [2020-10-27 20:27:48,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 20:27:48,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:48,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 20:27:48,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:27:48,794 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 13 states. [2020-10-27 20:27:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:49,646 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-10-27 20:27:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 20:27:49,652 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-27 20:27:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:49,653 INFO L225 Difference]: With dead ends: 82 [2020-10-27 20:27:49,654 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 20:27:49,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 20:27:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 20:27:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-27 20:27:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 20:27:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-10-27 20:27:49,675 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 45 [2020-10-27 20:27:49,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:49,678 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-10-27 20:27:49,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 20:27:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-10-27 20:27:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 20:27:49,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:49,681 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:49,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:27:49,682 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:49,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1433244297, now seen corresponding path program 8 times [2020-10-27 20:27:49,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:49,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897068928] [2020-10-27 20:27:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:49,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:49,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:49,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:49,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:50,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:50,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:50,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:51,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:51,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:52,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:52,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:52,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:52,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:53,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:54,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:54,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 20:27:54,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:27:54,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:27:54,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:54,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:27:54,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:27:54,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 20:27:54,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:54,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:27:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:54,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:54,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:27:54,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:27:54,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:27:54,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:27:54,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:27:54,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:27:54,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:27:54,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:27:54,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:27:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 149 proven. 155 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-27 20:27:55,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897068928] [2020-10-27 20:27:55,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:27:55,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:27:55,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373570392] [2020-10-27 20:27:55,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:27:55,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:27:55,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:27:55,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:27:55,015 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 14 states. [2020-10-27 20:27:55,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:27:55,970 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-10-27 20:27:55,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:27:55,970 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-10-27 20:27:55,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:27:55,972 INFO L225 Difference]: With dead ends: 85 [2020-10-27 20:27:55,973 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 20:27:55,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:27:55,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 20:27:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-27 20:27:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 20:27:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-10-27 20:27:55,990 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 57 [2020-10-27 20:27:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:27:55,991 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-10-27 20:27:55,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:27:55,991 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-10-27 20:27:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 20:27:55,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:27:55,992 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:27:55,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:27:55,992 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:27:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:27:55,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1781302638, now seen corresponding path program 9 times [2020-10-27 20:27:55,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:27:55,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405277969] [2020-10-27 20:27:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:27:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:27:56,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:27:56,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:00,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:00,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:00,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:01,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:01,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 20:28:01,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:28:01,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 20:28:01,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:01,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:28:01,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:28:01,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 20:28:01,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:06,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:06,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:06,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:06,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:06,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:06,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 20:28:06,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:06,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:06,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:06,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:06,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-27 20:28:06,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405277969] [2020-10-27 20:28:06,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:06,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:28:06,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269805660] [2020-10-27 20:28:06,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:28:06,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:06,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:28:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=148, Unknown=2, NotChecked=0, Total=182 [2020-10-27 20:28:06,106 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 14 states. [2020-10-27 20:28:07,194 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-27 20:28:07,366 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-27 20:28:07,708 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-27 20:28:07,933 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-27 20:28:08,224 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2020-10-27 20:28:08,695 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2020-10-27 20:28:09,497 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2020-10-27 20:28:09,873 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 62 [2020-10-27 20:28:10,448 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 58 [2020-10-27 20:28:10,864 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 62 [2020-10-27 20:28:11,701 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 58 [2020-10-27 20:28:13,629 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 128 DAG size of output: 62 [2020-10-27 20:28:15,109 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 134 DAG size of output: 58 [2020-10-27 20:28:19,203 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 118 DAG size of output: 63 [2020-10-27 20:28:22,170 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-10-27 20:28:26,148 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-27 20:28:26,651 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-27 20:28:27,113 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-27 20:28:27,678 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-27 20:28:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:28:28,022 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-27 20:28:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 20:28:28,024 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-27 20:28:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:28:28,025 INFO L225 Difference]: With dead ends: 103 [2020-10-27 20:28:28,025 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 20:28:28,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=452, Invalid=1104, Unknown=4, NotChecked=0, Total=1560 [2020-10-27 20:28:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 20:28:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 73. [2020-10-27 20:28:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 20:28:28,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-10-27 20:28:28,048 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 60 [2020-10-27 20:28:28,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:28:28,048 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-10-27 20:28:28,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:28:28,049 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-10-27 20:28:28,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 20:28:28,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:28:28,050 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:28:28,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 20:28:28,050 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:28:28,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:28:28,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1205582418, now seen corresponding path program 10 times [2020-10-27 20:28:28,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:28:28,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506054463] [2020-10-27 20:28:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:28:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:28,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:28,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:28,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:28,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:28,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:28,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:30,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:30,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:31,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:31,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:32,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:32,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:32,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:32,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:33,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:33,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 20:28:33,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 20:28:33,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 20:28:33,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:33,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 20:28:33,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:28:33,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 20:28:33,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:33,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:28:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:28:33,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:28:33,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:28:33,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:28:33,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:28:33,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 20:28:33,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:28:33,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:28:33,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:28:33,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:28:33,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:28:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-27 20:28:33,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506054463] [2020-10-27 20:28:33,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:28:33,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 20:28:33,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356436284] [2020-10-27 20:28:33,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 20:28:33,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:28:33,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 20:28:33,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:28:33,998 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 17 states. [2020-10-27 20:28:37,013 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-27 20:28:37,188 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-27 20:28:39,884 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-27 20:28:40,294 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-27 20:28:43,049 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 20:28:45,410 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-27 20:28:47,318 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-27 20:28:48,020 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-27 20:28:48,651 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-27 20:28:50,905 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2020-10-27 20:28:52,374 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2020-10-27 20:29:01,390 WARN L193 SmtUtils]: Spent 8.71 s on a formula simplification. DAG size of input: 97 DAG size of output: 62 [2020-10-27 20:29:07,200 WARN L193 SmtUtils]: Spent 5.51 s on a formula simplification. DAG size of input: 103 DAG size of output: 54 [2020-10-27 20:29:14,994 WARN L193 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 104 DAG size of output: 55 [2020-10-27 20:29:23,801 WARN L193 SmtUtils]: Spent 7.84 s on a formula simplification. DAG size of input: 110 DAG size of output: 54 [2020-10-27 20:29:29,213 WARN L193 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2020-10-27 20:29:39,309 WARN L193 SmtUtils]: Spent 6.66 s on a formula simplification. DAG size of input: 117 DAG size of output: 54 [2020-10-27 20:29:44,535 WARN L193 SmtUtils]: Spent 4.99 s on a formula simplification. DAG size of input: 118 DAG size of output: 55 [2020-10-27 20:29:52,330 WARN L193 SmtUtils]: Spent 5.28 s on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2020-10-27 20:29:54,355 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 (- 1)))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= 3 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999998)) 4294967296)) c_main_~x~0)) (<= 9 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999992)) 4294967296)))) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (<= 8 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999993)) 4294967296)))) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (<= 5 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999996)) 4294967296)) c_main_~x~0)) (= |c_old(#valid)| |c_#valid|) (<= 4 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999997)) 4294967296)))) (<= 11 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999990)) 4294967296)))) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (<= 6 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999995)) 4294967296)))) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 2 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999999)) 4294967296)))) (<= 10 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999991)) 4294967296)))) (<= 7 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999994)) 4294967296)) c_main_~x~0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= 1 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 5000000)) 4294967296)) c_main_~x~0)) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296)))))) is different from false [2020-10-27 20:30:01,611 WARN L193 SmtUtils]: Spent 5.09 s on a formula simplification. DAG size of input: 104 DAG size of output: 55 [2020-10-27 20:30:06,446 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification. DAG size of input: 88 DAG size of output: 25 [2020-10-27 20:30:12,946 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-10-27 20:30:28,299 WARN L193 SmtUtils]: Spent 9.27 s on a formula simplification. DAG size of input: 117 DAG size of output: 61 [2020-10-27 20:30:31,752 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2020-10-27 20:30:40,264 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-27 20:30:48,251 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-27 20:30:55,218 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-27 20:31:03,237 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-27 20:31:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:31:15,639 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2020-10-27 20:31:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 20:31:15,640 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-27 20:31:15,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:31:15,643 INFO L225 Difference]: With dead ends: 123 [2020-10-27 20:31:15,643 INFO L226 Difference]: Without dead ends: 117 [2020-10-27 20:31:15,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 139.9s TimeCoverageRelationStatistics Valid=754, Invalid=2001, Unknown=5, NotChecked=102, Total=2862 [2020-10-27 20:31:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-27 20:31:15,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 82. [2020-10-27 20:31:15,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 20:31:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-10-27 20:31:15,694 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 72 [2020-10-27 20:31:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:31:15,695 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-10-27 20:31:15,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 20:31:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-10-27 20:31:15,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 20:31:15,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:31:15,701 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:31:15,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 20:31:15,702 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:31:15,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:31:15,702 INFO L82 PathProgramCache]: Analyzing trace with hash -944074809, now seen corresponding path program 11 times [2020-10-27 20:31:15,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:31:15,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292239103] [2020-10-27 20:31:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:31:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:31:15,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:15,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:16,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:16,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:16,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:31:16,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking...