/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:48:18,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:48:18,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:48:18,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:48:18,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:48:18,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:48:18,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:48:18,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:48:18,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:48:18,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:48:18,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:48:18,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:48:18,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:48:18,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:48:18,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:48:18,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:48:18,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:48:18,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:48:19,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:48:19,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:48:19,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:48:19,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:48:19,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:48:19,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:48:19,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:48:19,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:48:19,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:48:19,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:48:19,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:48:19,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:48:19,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:48:19,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:48:19,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:48:19,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:48:19,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:48:19,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:48:19,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:48:19,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:48:19,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:48:19,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:48:19,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:48:19,051 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 [2020-10-26 20:48:19,102 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:48:19,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:48:19,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:48:19,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:48:19,108 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:48:19,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:48:19,108 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:48:19,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:48:19,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:48:19,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:48:19,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:48:19,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:48:19,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:48:19,111 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:48:19,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:48:19,112 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:48:19,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:48:19,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:48:19,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:48:19,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:48:19,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:48:19,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:48:19,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:48:19,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:48:19,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:48:19,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:48:19,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:48:19,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:48:19,116 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:48:19,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:48:19,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:48:19,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:48:19,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:48:19,562 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:48:19,563 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:48:19,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label34.c [2020-10-26 20:48:19,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f9d89e4e/a137e5328b3643bfac50797225547940/FLAG5ef656492 [2020-10-26 20:48:20,582 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:48:20,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label34.c [2020-10-26 20:48:20,608 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f9d89e4e/a137e5328b3643bfac50797225547940/FLAG5ef656492 [2020-10-26 20:48:20,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f9d89e4e/a137e5328b3643bfac50797225547940 [2020-10-26 20:48:20,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:48:20,702 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:48:20,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:48:20,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:48:20,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:48:20,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:48:20" (1/1) ... [2020-10-26 20:48:20,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42f26da8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:20, skipping insertion in model container [2020-10-26 20:48:20,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:48:20" (1/1) ... [2020-10-26 20:48:20,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:48:20,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:48:21,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:48:21,695 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:48:21,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:48:21,992 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:48:21,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:21 WrapperNode [2020-10-26 20:48:21,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:48:21,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:48:21,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:48:21,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:48:22,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:21" (1/1) ... [2020-10-26 20:48:22,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:21" (1/1) ... [2020-10-26 20:48:22,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:21" (1/1) ... [2020-10-26 20:48:22,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:21" (1/1) ... [2020-10-26 20:48:22,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:21" (1/1) ... [2020-10-26 20:48:22,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:21" (1/1) ... [2020-10-26 20:48:22,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:21" (1/1) ... [2020-10-26 20:48:22,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:48:22,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:48:22,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:48:22,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:48:22,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:21" (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 [2020-10-26 20:48:22,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:48:22,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:48:22,284 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:48:22,285 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:48:22,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:48:22,285 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:48:22,285 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:48:22,285 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:48:22,286 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:48:22,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:48:22,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:48:22,286 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:48:22,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:48:22,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:48:22,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:48:22,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:48:22,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:48:22,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:48:22,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:48:24,459 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:48:24,459 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:48:24,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:48:24 BoogieIcfgContainer [2020-10-26 20:48:24,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:48:24,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:48:24,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:48:24,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:48:24,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:48:20" (1/3) ... [2020-10-26 20:48:24,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cc0884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:48:24, skipping insertion in model container [2020-10-26 20:48:24,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:48:21" (2/3) ... [2020-10-26 20:48:24,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47cc0884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:48:24, skipping insertion in model container [2020-10-26 20:48:24,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:48:24" (3/3) ... [2020-10-26 20:48:24,472 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label34.c [2020-10-26 20:48:24,484 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:48:24,490 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:48:24,506 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:48:24,537 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:48:24,538 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:48:24,538 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:48:24,538 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:48:24,538 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:48:24,538 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:48:24,538 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:48:24,538 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:48:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:48:24,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-26 20:48:24,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:24,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:24,585 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:24,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:24,592 INFO L82 PathProgramCache]: Analyzing trace with hash -771065156, now seen corresponding path program 1 times [2020-10-26 20:48:24,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:24,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752398839] [2020-10-26 20:48:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:25,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:25,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:29,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:29,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-26 20:48:29,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:48:29,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4781 [2020-10-26 20:48:29,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:48:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:29,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-26 20:48:29,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:48:30,333 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:30,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:30,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:30,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:30,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:30,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:30,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 20:48:30,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:30,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:30,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:30,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:48:30,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752398839] [2020-10-26 20:48:30,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:48:30,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 20:48:30,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966442660] [2020-10-26 20:48:30,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:48:30,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:30,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:48:30,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:48:30,562 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 5 states. [2020-10-26 20:48:30,821 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:34,781 INFO L93 Difference]: Finished difference Result 889 states and 1542 transitions. [2020-10-26 20:48:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:48:34,784 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 197 [2020-10-26 20:48:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:34,803 INFO L225 Difference]: With dead ends: 889 [2020-10-26 20:48:34,803 INFO L226 Difference]: Without dead ends: 481 [2020-10-26 20:48:34,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:48:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-26 20:48:34,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 476. [2020-10-26 20:48:34,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-26 20:48:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 729 transitions. [2020-10-26 20:48:34,924 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 729 transitions. Word has length 197 [2020-10-26 20:48:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:34,925 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 729 transitions. [2020-10-26 20:48:34,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:48:34,925 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 729 transitions. [2020-10-26 20:48:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-26 20:48:34,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:34,933 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:34,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:48:34,934 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:34,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:34,935 INFO L82 PathProgramCache]: Analyzing trace with hash 823232299, now seen corresponding path program 1 times [2020-10-26 20:48:34,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:34,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418421078] [2020-10-26 20:48:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:35,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:35,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:36,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:38,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:38,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:38,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-26 20:48:38,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:48:38,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3712 [2020-10-26 20:48:38,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:38,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:48:38,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:38,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:48:38,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:38,973 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:38,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:38,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:39,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:39,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:39,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:39,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:48:39,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:39,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:39,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:39,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:39,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:48:39,155 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:48:39,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:39,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:39,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:39,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:48:39,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:39,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:48:39,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:39,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:48:39,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:48:39,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418421078] [2020-10-26 20:48:39,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:48:39,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:48:39,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304954337] [2020-10-26 20:48:39,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:48:39,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:39,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:48:39,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:48:39,323 INFO L87 Difference]: Start difference. First operand 476 states and 729 transitions. Second operand 7 states. [2020-10-26 20:48:39,578 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:42,495 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:43,248 INFO L93 Difference]: Finished difference Result 1432 states and 2225 transitions. [2020-10-26 20:48:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:48:43,248 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 206 [2020-10-26 20:48:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:43,261 INFO L225 Difference]: With dead ends: 1432 [2020-10-26 20:48:43,261 INFO L226 Difference]: Without dead ends: 962 [2020-10-26 20:48:43,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:48:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2020-10-26 20:48:43,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 941. [2020-10-26 20:48:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 941 states. [2020-10-26 20:48:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1378 transitions. [2020-10-26 20:48:43,336 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1378 transitions. Word has length 206 [2020-10-26 20:48:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:43,337 INFO L481 AbstractCegarLoop]: Abstraction has 941 states and 1378 transitions. [2020-10-26 20:48:43,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:48:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1378 transitions. [2020-10-26 20:48:43,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-26 20:48:43,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:43,343 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:43,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:48:43,344 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:43,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:43,344 INFO L82 PathProgramCache]: Analyzing trace with hash -649131075, now seen corresponding path program 1 times [2020-10-26 20:48:43,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:43,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568757427] [2020-10-26 20:48:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:43,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:44,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:44,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:46,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:46,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-26 20:48:46,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:48:46,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3070 [2020-10-26 20:48:46,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:46,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:48:46,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:46,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:48:46,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:46,688 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:46,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:46,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:46,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:46,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:46,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:46,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:48:46,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:46,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:46,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:46,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:46,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:46,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:46,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:46,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:46,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 20:48:46,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:46,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 20:48:46,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:46,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:46,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:46,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:48:46,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:47,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:48:47,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568757427] [2020-10-26 20:48:47,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:48:47,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:48:47,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624616125] [2020-10-26 20:48:47,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:48:47,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:47,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:48:47,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:48:47,035 INFO L87 Difference]: Start difference. First operand 941 states and 1378 transitions. Second operand 7 states. [2020-10-26 20:48:47,242 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:48:49,764 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:48:50,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:48:50,540 INFO L93 Difference]: Finished difference Result 2784 states and 4165 transitions. [2020-10-26 20:48:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:48:50,542 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 209 [2020-10-26 20:48:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:48:50,556 INFO L225 Difference]: With dead ends: 2784 [2020-10-26 20:48:50,556 INFO L226 Difference]: Without dead ends: 1849 [2020-10-26 20:48:50,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:48:50,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2020-10-26 20:48:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1808. [2020-10-26 20:48:50,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1808 states. [2020-10-26 20:48:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 2649 transitions. [2020-10-26 20:48:50,690 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 2649 transitions. Word has length 209 [2020-10-26 20:48:50,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:48:50,691 INFO L481 AbstractCegarLoop]: Abstraction has 1808 states and 2649 transitions. [2020-10-26 20:48:50,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:48:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 2649 transitions. [2020-10-26 20:48:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-26 20:48:50,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:48:50,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:48:50,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:48:50,708 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:48:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:48:50,708 INFO L82 PathProgramCache]: Analyzing trace with hash -978094586, now seen corresponding path program 1 times [2020-10-26 20:48:50,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:48:50,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771614840] [2020-10-26 20:48:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:48:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:50,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:50,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:52,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:52,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:54,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:55,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:55,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-26 20:48:55,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:48:55,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-26 20:48:55,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:55,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:48:55,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:48:55,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:48:55,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:56,126 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:48:56,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:48:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:56,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:56,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:56,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:48:56,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:56,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:48:56,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:56,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:48:56,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:48:56,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:48:56,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:56,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:48:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:56,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:56,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:56,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:48:56,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:56,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-26 20:48:56,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:56,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:48:56,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:48:56,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:48:56,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 20:48:56,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-26 20:48:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:48:56,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:48:56,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:48:56,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:48:56,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:48:56,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:48:56,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:48:56,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:48:56,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 20:48:56,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:48:56,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:48:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:48:56,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771614840] [2020-10-26 20:48:56,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:48:56,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:48:56,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338798502] [2020-10-26 20:48:56,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:48:56,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:48:56,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:48:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:48:56,470 INFO L87 Difference]: Start difference. First operand 1808 states and 2649 transitions. Second operand 7 states. [2020-10-26 20:48:56,678 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:48:57,785 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:49:00,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:00,310 INFO L93 Difference]: Finished difference Result 4563 states and 6747 transitions. [2020-10-26 20:49:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:49:00,311 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 220 [2020-10-26 20:49:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:00,327 INFO L225 Difference]: With dead ends: 4563 [2020-10-26 20:49:00,328 INFO L226 Difference]: Without dead ends: 2761 [2020-10-26 20:49:00,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:49:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2020-10-26 20:49:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2719. [2020-10-26 20:49:00,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2719 states. [2020-10-26 20:49:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 3961 transitions. [2020-10-26 20:49:00,436 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 3961 transitions. Word has length 220 [2020-10-26 20:49:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:00,437 INFO L481 AbstractCegarLoop]: Abstraction has 2719 states and 3961 transitions. [2020-10-26 20:49:00,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 3961 transitions. [2020-10-26 20:49:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-26 20:49:00,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:00,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:00,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:49:00,447 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:00,448 INFO L82 PathProgramCache]: Analyzing trace with hash -392653172, now seen corresponding path program 1 times [2020-10-26 20:49:00,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:00,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815597957] [2020-10-26 20:49:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:00,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:00,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:02,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:02,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:04,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:05,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:05,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-26 20:49:05,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:49:05,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 20:49:05,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:05,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:49:05,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:05,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 20:49:05,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:05,720 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:05,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:05,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:05,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:05,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:05,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:05,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:49:05,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:05,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:05,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:05,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:05,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 20:49:05,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:05,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:05,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:05,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:49:05,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:05,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 20:49:05,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:05,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:05,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:05,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:49:05,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:05,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-26 20:49:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:05,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:05,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:05,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:49:05,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:05,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:49:05,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:05,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:05,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-26 20:49:05,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:05,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:49:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:49:06,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815597957] [2020-10-26 20:49:06,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:06,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:06,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106999707] [2020-10-26 20:49:06,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:06,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:06,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:06,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:06,054 INFO L87 Difference]: Start difference. First operand 2719 states and 3961 transitions. Second operand 7 states. [2020-10-26 20:49:06,316 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:06,717 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:09,792 INFO L93 Difference]: Finished difference Result 8233 states and 12651 transitions. [2020-10-26 20:49:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:49:09,793 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 223 [2020-10-26 20:49:09,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:09,840 INFO L225 Difference]: With dead ends: 8233 [2020-10-26 20:49:09,840 INFO L226 Difference]: Without dead ends: 5520 [2020-10-26 20:49:09,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:49:09,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5520 states. [2020-10-26 20:49:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5520 to 5412. [2020-10-26 20:49:10,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5412 states. [2020-10-26 20:49:10,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5412 states to 5412 states and 7762 transitions. [2020-10-26 20:49:10,101 INFO L78 Accepts]: Start accepts. Automaton has 5412 states and 7762 transitions. Word has length 223 [2020-10-26 20:49:10,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:10,102 INFO L481 AbstractCegarLoop]: Abstraction has 5412 states and 7762 transitions. [2020-10-26 20:49:10,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 5412 states and 7762 transitions. [2020-10-26 20:49:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-26 20:49:10,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:10,122 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:10,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:49:10,122 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:10,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1715019268, now seen corresponding path program 1 times [2020-10-26 20:49:10,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:10,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717500921] [2020-10-26 20:49:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:10,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:10,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:11,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:12,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:13,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:13,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-26 20:49:13,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:49:13,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3637 [2020-10-26 20:49:13,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:13,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:49:13,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:13,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:49:13,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:14,041 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:14,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:14,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:14,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:14,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:14,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:14,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:49:14,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:14,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:14,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:14,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:14,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:14,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:14,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:14,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:14,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:14,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:14,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 20:49:14,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:14,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:14,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:14,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:49:14,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:14,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:49:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:14,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:14,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:14,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:49:14,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:14,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:49:14,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:14,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:14,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:14,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:49:14,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:49:14,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717500921] [2020-10-26 20:49:14,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:14,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:14,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873434320] [2020-10-26 20:49:14,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:49:14,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:14,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:49:14,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:14,483 INFO L87 Difference]: Start difference. First operand 5412 states and 7762 transitions. Second operand 8 states. [2020-10-26 20:49:14,680 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:17,994 INFO L93 Difference]: Finished difference Result 16308 states and 24462 transitions. [2020-10-26 20:49:17,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:49:17,995 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 227 [2020-10-26 20:49:17,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:18,074 INFO L225 Difference]: With dead ends: 16308 [2020-10-26 20:49:18,074 INFO L226 Difference]: Without dead ends: 10902 [2020-10-26 20:49:18,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:49:18,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10902 states. [2020-10-26 20:49:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10902 to 10775. [2020-10-26 20:49:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10775 states. [2020-10-26 20:49:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10775 states to 10775 states and 15837 transitions. [2020-10-26 20:49:18,608 INFO L78 Accepts]: Start accepts. Automaton has 10775 states and 15837 transitions. Word has length 227 [2020-10-26 20:49:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:18,611 INFO L481 AbstractCegarLoop]: Abstraction has 10775 states and 15837 transitions. [2020-10-26 20:49:18,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:49:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 10775 states and 15837 transitions. [2020-10-26 20:49:18,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-26 20:49:18,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:18,647 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:18,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:49:18,647 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:18,648 INFO L82 PathProgramCache]: Analyzing trace with hash -730639224, now seen corresponding path program 1 times [2020-10-26 20:49:18,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:18,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794695196] [2020-10-26 20:49:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:18,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:19,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:20,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:20,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:21,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:21,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-26 20:49:21,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:49:21,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2532 [2020-10-26 20:49:21,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:21,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 20:49:21,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:49:21,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 204 [2020-10-26 20:49:21,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:21,620 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:21,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:21,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:21,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:21,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:21,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:21,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:49:21,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:21,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:21,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:21,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:21,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:21,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:21,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:21,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:21,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:49:21,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:21,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:49:21,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:21,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:21,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:21,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:49:21,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:21,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:49:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:21,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:21,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:21,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:21,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:21,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:49:21,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-26 20:49:21,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:21,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:21,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:21,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:49:21,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:49:22,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794695196] [2020-10-26 20:49:22,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:22,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:49:22,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756353095] [2020-10-26 20:49:22,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:49:22,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:22,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:49:22,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:49:22,192 INFO L87 Difference]: Start difference. First operand 10775 states and 15837 transitions. Second operand 8 states. [2020-10-26 20:49:22,506 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:49:22,997 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-26 20:49:25,138 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 20:49:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:29,419 INFO L93 Difference]: Finished difference Result 27383 states and 44274 transitions. [2020-10-26 20:49:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 20:49:29,420 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 229 [2020-10-26 20:49:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:29,523 INFO L225 Difference]: With dead ends: 27383 [2020-10-26 20:49:29,524 INFO L226 Difference]: Without dead ends: 16234 [2020-10-26 20:49:29,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:49:29,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16234 states. [2020-10-26 20:49:30,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16234 to 15520. [2020-10-26 20:49:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15520 states. [2020-10-26 20:49:30,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15520 states to 15520 states and 22884 transitions. [2020-10-26 20:49:30,207 INFO L78 Accepts]: Start accepts. Automaton has 15520 states and 22884 transitions. Word has length 229 [2020-10-26 20:49:30,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:30,207 INFO L481 AbstractCegarLoop]: Abstraction has 15520 states and 22884 transitions. [2020-10-26 20:49:30,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:49:30,208 INFO L276 IsEmpty]: Start isEmpty. Operand 15520 states and 22884 transitions. [2020-10-26 20:49:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-26 20:49:30,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:30,255 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:30,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:49:30,255 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:30,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:30,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1468901103, now seen corresponding path program 1 times [2020-10-26 20:49:30,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:30,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270384844] [2020-10-26 20:49:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:30,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:30,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:32,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:33,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:33,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:35,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:35,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-26 20:49:35,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:49:35,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 20:49:35,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:35,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:49:35,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:35,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:49:35,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:35,542 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:35,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:35,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:35,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:35,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:35,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:35,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:49:35,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:35,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:35,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:35,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:35,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:35,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:35,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:35,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:35,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 20:49:35,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:35,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 20:49:35,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:35,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:35,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:35,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 20:49:35,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:35,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-26 20:49:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:35,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:35,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:35,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:35,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:35,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:49:35,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:35,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:35,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:49:35,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:35,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:49:35,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270384844] [2020-10-26 20:49:35,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:35,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:35,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942811305] [2020-10-26 20:49:35,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:35,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:35,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:35,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:35,821 INFO L87 Difference]: Start difference. First operand 15520 states and 22884 transitions. Second operand 7 states. [2020-10-26 20:49:36,040 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:36,963 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:49:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:39,815 INFO L93 Difference]: Finished difference Result 44711 states and 79448 transitions. [2020-10-26 20:49:39,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:49:39,815 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 232 [2020-10-26 20:49:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:40,028 INFO L225 Difference]: With dead ends: 44711 [2020-10-26 20:49:40,028 INFO L226 Difference]: Without dead ends: 29197 [2020-10-26 20:49:40,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:49:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29197 states. [2020-10-26 20:49:41,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29197 to 28081. [2020-10-26 20:49:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28081 states. [2020-10-26 20:49:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28081 states to 28081 states and 37802 transitions. [2020-10-26 20:49:41,490 INFO L78 Accepts]: Start accepts. Automaton has 28081 states and 37802 transitions. Word has length 232 [2020-10-26 20:49:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:41,491 INFO L481 AbstractCegarLoop]: Abstraction has 28081 states and 37802 transitions. [2020-10-26 20:49:41,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 28081 states and 37802 transitions. [2020-10-26 20:49:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-26 20:49:41,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:41,558 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:41,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:49:41,558 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:41,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:41,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1809047457, now seen corresponding path program 1 times [2020-10-26 20:49:41,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:41,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669727777] [2020-10-26 20:49:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:41,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:41,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:42,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:45,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:46,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:46,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-26 20:49:46,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:49:46,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-26 20:49:46,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:46,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:49:46,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:46,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:49:46,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:46,949 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:46,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:46,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:46,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:46,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:46,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:46,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:49:46,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:46,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:46,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:46,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:46,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:47,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:47,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:47,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:47,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:49:47,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:47,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-26 20:49:47,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:47,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:47,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:47,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:49:47,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:47,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:49:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:47,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:47,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:47,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 20:49:47,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:47,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 20:49:47,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:47,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:47,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-26 20:49:47,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:47,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:47,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-26 20:49:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:47,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:47,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:47,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:47,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:47,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:49:47,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:47,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:47,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:49:47,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:47,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 58 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 20:49:47,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669727777] [2020-10-26 20:49:47,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:47,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:47,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758356904] [2020-10-26 20:49:47,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:47,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:47,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:47,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:47,487 INFO L87 Difference]: Start difference. First operand 28081 states and 37802 transitions. Second operand 7 states. [2020-10-26 20:49:47,699 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:49:48,527 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:49:51,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:49:51,712 INFO L93 Difference]: Finished difference Result 64656 states and 88127 transitions. [2020-10-26 20:49:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:49:51,712 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 264 [2020-10-26 20:49:51,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:49:51,865 INFO L225 Difference]: With dead ends: 64656 [2020-10-26 20:49:51,865 INFO L226 Difference]: Without dead ends: 43023 [2020-10-26 20:49:51,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:49:51,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43023 states. [2020-10-26 20:49:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43023 to 42536. [2020-10-26 20:49:52,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42536 states. [2020-10-26 20:49:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42536 states to 42536 states and 57886 transitions. [2020-10-26 20:49:53,070 INFO L78 Accepts]: Start accepts. Automaton has 42536 states and 57886 transitions. Word has length 264 [2020-10-26 20:49:53,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:49:53,070 INFO L481 AbstractCegarLoop]: Abstraction has 42536 states and 57886 transitions. [2020-10-26 20:49:53,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:49:53,071 INFO L276 IsEmpty]: Start isEmpty. Operand 42536 states and 57886 transitions. [2020-10-26 20:49:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-26 20:49:53,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:49:53,131 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:49:53,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:49:53,131 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:49:53,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:49:53,132 INFO L82 PathProgramCache]: Analyzing trace with hash 849855704, now seen corresponding path program 1 times [2020-10-26 20:49:53,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:49:53,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626556436] [2020-10-26 20:49:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:49:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:53,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:53,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:55,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-26 20:49:58,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:49:58,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 20:49:58,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:49:58,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:49:58,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 20:49:58,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:58,459 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:49:58,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:49:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:58,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:49:58,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:58,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:49:58,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:49:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:49:58,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:49:58,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:58,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:49:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:58,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 20:49:58,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:58,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-26 20:49:58,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:49:58,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:49:58,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 20:49:58,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:58,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-26 20:49:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:49:58,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:49:58,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:49:58,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:49:58,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:49:58,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:49:58,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:49:58,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:49:58,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:49:58,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:49:58,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:49:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:49:59,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626556436] [2020-10-26 20:49:59,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:49:59,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:49:59,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075112664] [2020-10-26 20:49:59,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:49:59,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:49:59,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:49:59,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:49:59,014 INFO L87 Difference]: Start difference. First operand 42536 states and 57886 transitions. Second operand 7 states. [2020-10-26 20:49:59,231 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:00,577 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:03,271 INFO L93 Difference]: Finished difference Result 74695 states and 109712 transitions. [2020-10-26 20:50:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:50:03,271 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 272 [2020-10-26 20:50:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:03,514 INFO L225 Difference]: With dead ends: 74695 [2020-10-26 20:50:03,514 INFO L226 Difference]: Without dead ends: 45768 [2020-10-26 20:50:03,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:50:03,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45768 states. [2020-10-26 20:50:05,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45768 to 44795. [2020-10-26 20:50:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44795 states. [2020-10-26 20:50:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44795 states to 44795 states and 60904 transitions. [2020-10-26 20:50:05,137 INFO L78 Accepts]: Start accepts. Automaton has 44795 states and 60904 transitions. Word has length 272 [2020-10-26 20:50:05,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:05,138 INFO L481 AbstractCegarLoop]: Abstraction has 44795 states and 60904 transitions. [2020-10-26 20:50:05,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:50:05,138 INFO L276 IsEmpty]: Start isEmpty. Operand 44795 states and 60904 transitions. [2020-10-26 20:50:05,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-26 20:50:05,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:05,185 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:05,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:50:05,185 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:05,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1766699596, now seen corresponding path program 2 times [2020-10-26 20:50:05,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:05,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003481506] [2020-10-26 20:50:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:05,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:05,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:05,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:10,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:10,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-26 20:50:10,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:50:10,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 20:50:10,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:10,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:50:10,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:10,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:50:10,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:10,466 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:10,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:10,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:10,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:10,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:10,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:10,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:50:10,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:10,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:10,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:10,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:10,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:10,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:10,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:10,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:10,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:10,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:10,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:50:10,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:10,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:10,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:10,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:10,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:10,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:50:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:10,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:10,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:10,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:50:10,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:10,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-26 20:50:10,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:10,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:10,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:50:10,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:10,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:50:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:10,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:10,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:10,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 20:50:10,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:10,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:50:10,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:10,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:10,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-26 20:50:10,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:10,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:10,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-26 20:50:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:10,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:10,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:10,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:10,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:10,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:50:10,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:10,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:10,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:50:10,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:10,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 79 proven. 39 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 20:50:10,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003481506] [2020-10-26 20:50:10,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:10,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:50:10,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683099368] [2020-10-26 20:50:10,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:50:10,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:10,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:50:10,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:50:10,943 INFO L87 Difference]: Start difference. First operand 44795 states and 60904 transitions. Second operand 8 states. [2020-10-26 20:50:11,150 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:12,809 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:50:15,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:15,194 INFO L93 Difference]: Finished difference Result 87277 states and 120668 transitions. [2020-10-26 20:50:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:50:15,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 275 [2020-10-26 20:50:15,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:15,405 INFO L225 Difference]: With dead ends: 87277 [2020-10-26 20:50:15,406 INFO L226 Difference]: Without dead ends: 56633 [2020-10-26 20:50:15,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:50:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56633 states. [2020-10-26 20:50:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56633 to 55917. [2020-10-26 20:50:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55917 states. [2020-10-26 20:50:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55917 states to 55917 states and 76393 transitions. [2020-10-26 20:50:17,545 INFO L78 Accepts]: Start accepts. Automaton has 55917 states and 76393 transitions. Word has length 275 [2020-10-26 20:50:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:17,545 INFO L481 AbstractCegarLoop]: Abstraction has 55917 states and 76393 transitions. [2020-10-26 20:50:17,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:50:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 55917 states and 76393 transitions. [2020-10-26 20:50:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-10-26 20:50:17,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:17,612 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:17,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:50:17,612 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:17,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:17,613 INFO L82 PathProgramCache]: Analyzing trace with hash -946417, now seen corresponding path program 1 times [2020-10-26 20:50:17,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:17,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569088148] [2020-10-26 20:50:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:17,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:18,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:18,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:19,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:22,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:22,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-26 20:50:22,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:50:22,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 20:50:22,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:22,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:50:22,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:50:22,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:50:22,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:23,195 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:23,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:23,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:23,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:23,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:23,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:23,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:50:23,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:23,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:23,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:23,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:50:23,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:23,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:23,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:23,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:23,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:50:23,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:23,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-26 20:50:23,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:23,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:23,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:23,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:50:23,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:23,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 20:50:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:23,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:23,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:23,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-26 20:50:23,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:23,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 20:50:23,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:23,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:23,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 20:50:23,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:23,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:23,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-26 20:50:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:23,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:23,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:23,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:23,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:23,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:50:23,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:23,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:23,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:50:23,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:23,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 94 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 20:50:23,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569088148] [2020-10-26 20:50:23,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:23,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:50:23,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124673458] [2020-10-26 20:50:23,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:50:23,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:23,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:50:23,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:50:23,613 INFO L87 Difference]: Start difference. First operand 55917 states and 76393 transitions. Second operand 7 states. [2020-10-26 20:50:23,814 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:25,909 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:28,419 INFO L93 Difference]: Finished difference Result 145791 states and 206825 transitions. [2020-10-26 20:50:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:50:28,420 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 300 [2020-10-26 20:50:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:28,881 INFO L225 Difference]: With dead ends: 145791 [2020-10-26 20:50:28,884 INFO L226 Difference]: Without dead ends: 98622 [2020-10-26 20:50:28,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:50:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98622 states. [2020-10-26 20:50:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98622 to 97914. [2020-10-26 20:50:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97914 states. [2020-10-26 20:50:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97914 states to 97914 states and 135383 transitions. [2020-10-26 20:50:32,576 INFO L78 Accepts]: Start accepts. Automaton has 97914 states and 135383 transitions. Word has length 300 [2020-10-26 20:50:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:32,576 INFO L481 AbstractCegarLoop]: Abstraction has 97914 states and 135383 transitions. [2020-10-26 20:50:32,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:50:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand 97914 states and 135383 transitions. [2020-10-26 20:50:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-26 20:50:32,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:32,679 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:32,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:50:32,680 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:32,680 INFO L82 PathProgramCache]: Analyzing trace with hash 316433776, now seen corresponding path program 1 times [2020-10-26 20:50:32,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:32,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076005547] [2020-10-26 20:50:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:32,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:33,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:34,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:34,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:34,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-26 20:50:34,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:50:34,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1634 [2020-10-26 20:50:34,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:34,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:50:34,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 20:50:34,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 208 [2020-10-26 20:50:34,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:34,882 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:34,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:34,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:34,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:34,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:34,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:34,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:50:34,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:34,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:34,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:34,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:34,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:34,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:35,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:35,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:35,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:50:35,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:35,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-26 20:50:35,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:35,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:35,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:35,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 20:50:35,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:35,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:50:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:35,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:35,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:35,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:35,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:50:35,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:50:35,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 20:50:35,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:50:35,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 107 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:50:35,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076005547] [2020-10-26 20:50:35,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:35,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:50:35,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710633579] [2020-10-26 20:50:35,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:50:35,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:35,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:50:35,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:50:35,507 INFO L87 Difference]: Start difference. First operand 97914 states and 135383 transitions. Second operand 8 states. [2020-10-26 20:50:35,903 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:36,901 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:38,178 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:50:43,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:43,291 INFO L93 Difference]: Finished difference Result 223581 states and 346324 transitions. [2020-10-26 20:50:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:50:43,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 308 [2020-10-26 20:50:43,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:50:44,283 INFO L225 Difference]: With dead ends: 223581 [2020-10-26 20:50:44,283 INFO L226 Difference]: Without dead ends: 128820 [2020-10-26 20:50:44,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:50:44,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128820 states. [2020-10-26 20:50:47,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128820 to 125027. [2020-10-26 20:50:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125027 states. [2020-10-26 20:50:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125027 states to 125027 states and 173780 transitions. [2020-10-26 20:50:48,552 INFO L78 Accepts]: Start accepts. Automaton has 125027 states and 173780 transitions. Word has length 308 [2020-10-26 20:50:48,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:50:48,553 INFO L481 AbstractCegarLoop]: Abstraction has 125027 states and 173780 transitions. [2020-10-26 20:50:48,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:50:48,553 INFO L276 IsEmpty]: Start isEmpty. Operand 125027 states and 173780 transitions. [2020-10-26 20:50:48,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-26 20:50:48,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:50:48,660 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:50:48,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:50:48,660 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:50:48,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:50:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1720889976, now seen corresponding path program 1 times [2020-10-26 20:50:48,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:50:48,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686606864] [2020-10-26 20:50:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:50:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:48,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:49,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:49,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:52,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-26 20:50:52,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:50:52,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3369 [2020-10-26 20:50:52,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:50:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 20:50:52,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:52,290 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:50:52,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:50:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:52,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:52,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:50:52,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:52,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:50:52,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:52,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:52,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:52,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:52,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:52,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:50:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:52,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:52,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:50:52,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:52,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:50:52,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:50:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:50:52,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:50:52,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:52,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:50:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:52,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:52,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:50:52,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:52,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 20:50:52,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:52,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:50:52,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:50:52,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 20:50:52,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:52,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-26 20:50:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:50:52,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:50:52,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:50:52,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:50:52,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:50:52,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:50:52,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:50:52,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:50:52,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:50:52,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:50:52,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:50:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 137 proven. 44 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-26 20:50:52,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686606864] [2020-10-26 20:50:52,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:50:52,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:50:52,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139452202] [2020-10-26 20:50:52,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:50:52,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:50:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:50:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:50:52,896 INFO L87 Difference]: Start difference. First operand 125027 states and 173780 transitions. Second operand 7 states. [2020-10-26 20:50:53,282 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:50:54,816 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:50:59,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:50:59,161 INFO L93 Difference]: Finished difference Result 267521 states and 396237 transitions. [2020-10-26 20:50:59,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:50:59,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 321 [2020-10-26 20:50:59,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:00,165 INFO L225 Difference]: With dead ends: 267521 [2020-10-26 20:51:00,166 INFO L226 Difference]: Without dead ends: 144564 [2020-10-26 20:51:00,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:51:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144564 states. [2020-10-26 20:51:03,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144564 to 137372. [2020-10-26 20:51:03,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137372 states. [2020-10-26 20:51:04,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137372 states to 137372 states and 178835 transitions. [2020-10-26 20:51:04,589 INFO L78 Accepts]: Start accepts. Automaton has 137372 states and 178835 transitions. Word has length 321 [2020-10-26 20:51:04,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:04,589 INFO L481 AbstractCegarLoop]: Abstraction has 137372 states and 178835 transitions. [2020-10-26 20:51:04,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:51:04,589 INFO L276 IsEmpty]: Start isEmpty. Operand 137372 states and 178835 transitions. [2020-10-26 20:51:04,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-26 20:51:04,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:04,693 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:51:04,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:51:04,693 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:04,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1387010477, now seen corresponding path program 1 times [2020-10-26 20:51:04,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:04,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21803006] [2020-10-26 20:51:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:04,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:04,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:05,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:08,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:09,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:09,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-26 20:51:09,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:51:09,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 20:51:09,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:09,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:51:09,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:09,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 20:51:09,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:10,041 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:10,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:10,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:10,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:10,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:10,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:10,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 20:51:10,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:10,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:10,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:10,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:51:10,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:10,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:10,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:10,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:10,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 20:51:10,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:10,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-26 20:51:10,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:10,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:10,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:10,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 20:51:10,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:10,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-26 20:51:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:10,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:10,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:10,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:51:10,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:10,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-26 20:51:10,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:10,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:51:10,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:10,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-26 20:51:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:10,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:10,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:10,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:51:10,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:10,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-26 20:51:10,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:10,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:10,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:10,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:51:10,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:10,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 20:51:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:10,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:10,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:10,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:51:10,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:10,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 20:51:10,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:51:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:10,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 153 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-26 20:51:10,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21803006] [2020-10-26 20:51:10,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:10,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:51:10,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696194744] [2020-10-26 20:51:10,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:51:10,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:10,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:51:10,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:51:10,875 INFO L87 Difference]: Start difference. First operand 137372 states and 178835 transitions. Second operand 9 states. [2020-10-26 20:51:11,078 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:51:12,026 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:51:16,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:51:16,649 INFO L93 Difference]: Finished difference Result 269985 states and 355400 transitions. [2020-10-26 20:51:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:51:16,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 323 [2020-10-26 20:51:16,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:51:17,178 INFO L225 Difference]: With dead ends: 269985 [2020-10-26 20:51:17,178 INFO L226 Difference]: Without dead ends: 167147 [2020-10-26 20:51:17,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:51:17,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167147 states. [2020-10-26 20:51:20,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167147 to 166336. [2020-10-26 20:51:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166336 states. [2020-10-26 20:51:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166336 states to 166336 states and 215177 transitions. [2020-10-26 20:51:21,759 INFO L78 Accepts]: Start accepts. Automaton has 166336 states and 215177 transitions. Word has length 323 [2020-10-26 20:51:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:51:21,759 INFO L481 AbstractCegarLoop]: Abstraction has 166336 states and 215177 transitions. [2020-10-26 20:51:21,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:51:21,759 INFO L276 IsEmpty]: Start isEmpty. Operand 166336 states and 215177 transitions. [2020-10-26 20:51:21,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-26 20:51:21,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:21,878 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:51:21,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:51:21,878 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:21,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:21,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1380087436, now seen corresponding path program 1 times [2020-10-26 20:51:21,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:21,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911654658] [2020-10-26 20:51:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:21,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:22,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:23,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:25,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:25,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 351 [2020-10-26 20:51:25,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:51:25,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3174 [2020-10-26 20:51:25,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:51:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-26 20:51:25,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 20:51:25,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:25,344 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:25,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:25,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:25,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:25,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:25,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:25,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:51:25,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:25,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:51:25,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:25,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:51:25,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:25,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:51:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:25,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:25,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:25,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:51:25,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:25,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:51:25,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:25,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:25,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:25,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:51:25,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:25,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:51:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:25,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:25,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:25,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 20:51:25,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:25,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-26 20:51:25,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 20:51:25,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:25,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 20:51:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:25,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:25,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:25,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:51:25,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:25,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-26 20:51:25,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:25,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:51:25,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:51:25,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:51:25,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 193 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 20:51:26,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911654658] [2020-10-26 20:51:26,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:51:26,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:51:26,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069485835] [2020-10-26 20:51:26,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:51:26,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:26,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:51:26,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:51:26,127 INFO L87 Difference]: Start difference. First operand 166336 states and 215177 transitions. Second operand 8 states. [2020-10-26 20:51:26,443 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:51:26,901 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 162