/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_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:51:33,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:51:33,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:51:33,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:51:33,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:51:33,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:51:33,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:51:33,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:51:33,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:51:33,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:51:33,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:51:33,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:51:33,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:51:33,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:51:33,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:51:33,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:51:33,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:51:33,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:51:33,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:51:33,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:51:33,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:51:33,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:51:33,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:51:33,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:51:33,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:51:33,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:51:33,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:51:33,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:51:33,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:51:33,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:51:33,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:51:33,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:51:33,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:51:33,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:51:33,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:51:33,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:51:33,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:51:33,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:51:33,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:51:33,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:51:33,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:51:33,102 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 20:51:33,131 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:51:33,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:51:33,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:51:33,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:51:33,133 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:51:33,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:51:33,134 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:51:33,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:51:33,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:51:33,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:51:33,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:51:33,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:51:33,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:51:33,135 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:51:33,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:51:33,135 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:51:33,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:51:33,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:51:33,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:51:33,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:51:33,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:51:33,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:51:33,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:51:33,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:51:33,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:51:33,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:51:33,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:51:33,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:51:33,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:51:33,138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:51:33,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:51:33,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:51:33,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:51:33,565 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:51:33,566 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:51:33,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label43.c [2020-10-26 20:51:33,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dce7c26d5/f3cb455c9efb499d97de6351899d62db/FLAGd7853f99a [2020-10-26 20:51:34,433 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:51:34,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label43.c [2020-10-26 20:51:34,456 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dce7c26d5/f3cb455c9efb499d97de6351899d62db/FLAGd7853f99a [2020-10-26 20:51:34,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dce7c26d5/f3cb455c9efb499d97de6351899d62db [2020-10-26 20:51:34,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:51:34,569 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:51:34,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:51:34,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:51:34,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:51:34,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:51:34" (1/1) ... [2020-10-26 20:51:34,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a6a153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:34, skipping insertion in model container [2020-10-26 20:51:34,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:51:34" (1/1) ... [2020-10-26 20:51:34,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:51:34,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:51:35,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:51:35,493 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:51:35,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:51:35,739 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:51:35,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:35 WrapperNode [2020-10-26 20:51:35,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:51:35,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:51:35,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:51:35,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:51:35,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:35" (1/1) ... [2020-10-26 20:51:35,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:35" (1/1) ... [2020-10-26 20:51:35,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:35" (1/1) ... [2020-10-26 20:51:35,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:35" (1/1) ... [2020-10-26 20:51:35,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:35" (1/1) ... [2020-10-26 20:51:35,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:35" (1/1) ... [2020-10-26 20:51:35,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:35" (1/1) ... [2020-10-26 20:51:36,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:51:36,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:51:36,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:51:36,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:51:36,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:35" (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 20:51:36,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:51:36,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:51:36,092 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:51:36,093 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:51:36,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:51:36,094 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:51:36,094 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:51:36,095 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:51:36,095 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:51:36,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:51:36,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:51:36,096 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:51:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:51:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:51:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:51:36,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:51:36,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:51:36,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:51:36,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:51:38,411 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:51:38,412 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:51:38,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:51:38 BoogieIcfgContainer [2020-10-26 20:51:38,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:51:38,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:51:38,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:51:38,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:51:38,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:51:34" (1/3) ... [2020-10-26 20:51:38,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34aadd19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:51:38, skipping insertion in model container [2020-10-26 20:51:38,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:51:35" (2/3) ... [2020-10-26 20:51:38,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34aadd19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:51:38, skipping insertion in model container [2020-10-26 20:51:38,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:51:38" (3/3) ... [2020-10-26 20:51:38,427 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label43.c [2020-10-26 20:51:38,439 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:51:38,448 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:51:38,462 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:51:38,504 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:51:38,505 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:51:38,505 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:51:38,505 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:51:38,505 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:51:38,505 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:51:38,505 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:51:38,505 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:51:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:51:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-26 20:51:38,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:51:38,566 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] [2020-10-26 20:51:38,566 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:51:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:51:38,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1977011172, now seen corresponding path program 1 times [2020-10-26 20:51:38,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:51:38,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905213683] [2020-10-26 20:51:38,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:51:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:39,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:39,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:43,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:43,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 20:51:43,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:51:43,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4154 [2020-10-26 20:51:43,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:43,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:51:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:51:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:51:43,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:51:44,874 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:51:44,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:51:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:51:44,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:51:44,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:51:44,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:51:44,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:51:44,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 20:51:44,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:51:44,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:51:44,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:51:44,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:51:44,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:51:45,779 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 20:51:45,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905213683] [2020-10-26 20:51:45,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:51:45,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:51:45,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734161352] [2020-10-26 20:51:45,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:51:45,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:51:45,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:51:45,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:51:45,810 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:51:46,435 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 20:51:47,507 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 20:51:48,604 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 20:51:49,634 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 204 [2020-10-26 20:51:51,194 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 225 DAG size of output: 203 [2020-10-26 20:51:52,601 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 225 DAG size of output: 202 [2020-10-26 20:51:54,110 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 201 [2020-10-26 20:51:57,342 WARN L193 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 200 [2020-10-26 20:51:58,589 WARN L193 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 198 [2020-10-26 20:52:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:01,465 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:52:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:52:01,467 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 157 [2020-10-26 20:52:01,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:01,483 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:52:01,483 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:52:01,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:52:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:52:01,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:52:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:52:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:52:01,571 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 157 [2020-10-26 20:52:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:01,572 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:52:01,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:52:01,573 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:52:01,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-26 20:52:01,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:01,580 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 20:52:01,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:52:01,582 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:01,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:01,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1096824911, now seen corresponding path program 1 times [2020-10-26 20:52:01,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:01,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351578562] [2020-10-26 20:52:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:01,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:01,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:03,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:05,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:05,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-26 20:52:05,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:52:05,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4017 [2020-10-26 20:52:05,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:05,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 20:52:05,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:05,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-26 20:52:05,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:06,952 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-26 20:52:07,269 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 84 [2020-10-26 20:52:07,676 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 84 [2020-10-26 20:52:08,274 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 101 [2020-10-26 20:52:08,918 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 103 [2020-10-26 20:52:09,488 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 89 [2020-10-26 20:52:09,977 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 79 [2020-10-26 20:52:10,404 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 62 [2020-10-26 20:52:10,683 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:10,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:10,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:10,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:10,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:10,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:10,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:52:10,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:10,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:10,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:10,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:10,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:10,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:10,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:10,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:10,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:52:10,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:10,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 20:52:10,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:10,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:52:10,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:52:10,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:11,432 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 89 [2020-10-26 20:52:11,924 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 122 [2020-10-26 20:52:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:52:12,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351578562] [2020-10-26 20:52:12,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:52:12,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 20:52:12,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212376617] [2020-10-26 20:52:12,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 20:52:12,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:12,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 20:52:12,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:52:12,547 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 16 states. [2020-10-26 20:52:12,983 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-26 20:52:13,617 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 73 [2020-10-26 20:52:14,023 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-10-26 20:52:15,155 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 230 DAG size of output: 216 [2020-10-26 20:52:16,388 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 250 DAG size of output: 236 [2020-10-26 20:52:18,376 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 266 DAG size of output: 231 [2020-10-26 20:52:19,120 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 121 [2020-10-26 20:52:21,802 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 272 DAG size of output: 227 [2020-10-26 20:52:25,727 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 273 DAG size of output: 224 [2020-10-26 20:52:30,292 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 274 DAG size of output: 221 [2020-10-26 20:52:32,252 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 274 DAG size of output: 217 [2020-10-26 20:52:37,251 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 180 [2020-10-26 20:52:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:42,147 INFO L93 Difference]: Finished difference Result 1223 states and 1997 transitions. [2020-10-26 20:52:42,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 20:52:42,147 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 168 [2020-10-26 20:52:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:42,157 INFO L225 Difference]: With dead ends: 1223 [2020-10-26 20:52:42,157 INFO L226 Difference]: Without dead ends: 979 [2020-10-26 20:52:42,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2020-10-26 20:52:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2020-10-26 20:52:42,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 959. [2020-10-26 20:52:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-10-26 20:52:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1332 transitions. [2020-10-26 20:52:42,266 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1332 transitions. Word has length 168 [2020-10-26 20:52:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:42,267 INFO L481 AbstractCegarLoop]: Abstraction has 959 states and 1332 transitions. [2020-10-26 20:52:42,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 20:52:42,268 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1332 transitions. [2020-10-26 20:52:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 20:52:42,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:42,278 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-10-26 20:52:42,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:52:42,279 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:42,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1546364963, now seen corresponding path program 1 times [2020-10-26 20:52:42,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:42,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673629470] [2020-10-26 20:52:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:42,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:42,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:42,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-26 20:52:42,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:42,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-26 20:52:42,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:42,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:42,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:52:42,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-26 20:52:42,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:43,376 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:43,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:43,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:43,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:43,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:43,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:43,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:52:43,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:43,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:52:43,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:43,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:52:43,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:52:43,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:43,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:43,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:43,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:52:43,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:43,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-26 20:52:43,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:43,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:43,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:43,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:52:43,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:52:43,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673629470] [2020-10-26 20:52:43,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:52:43,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:52:43,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935803268] [2020-10-26 20:52:43,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:52:43,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:43,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:52:43,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:52:43,676 INFO L87 Difference]: Start difference. First operand 959 states and 1332 transitions. Second operand 5 states. [2020-10-26 20:52:44,077 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:52:46,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:46,983 INFO L93 Difference]: Finished difference Result 2446 states and 3572 transitions. [2020-10-26 20:52:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:52:46,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2020-10-26 20:52:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:47,007 INFO L225 Difference]: With dead ends: 2446 [2020-10-26 20:52:47,007 INFO L226 Difference]: Without dead ends: 1608 [2020-10-26 20:52:47,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:52:47,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2020-10-26 20:52:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1603. [2020-10-26 20:52:47,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1603 states. [2020-10-26 20:52:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2110 transitions. [2020-10-26 20:52:47,082 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2110 transitions. Word has length 178 [2020-10-26 20:52:47,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:47,082 INFO L481 AbstractCegarLoop]: Abstraction has 1603 states and 2110 transitions. [2020-10-26 20:52:47,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:52:47,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2110 transitions. [2020-10-26 20:52:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 20:52:47,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:47,087 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:52:47,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:52:47,087 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:47,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:47,088 INFO L82 PathProgramCache]: Analyzing trace with hash -154911110, now seen corresponding path program 1 times [2020-10-26 20:52:47,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:47,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038167935] [2020-10-26 20:52:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:47,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:47,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:47,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:48,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:49,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:52,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:52,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-26 20:52:52,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:52:52,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4984 [2020-10-26 20:52:52,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:52,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:52:52,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:52,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:52:52,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:52,507 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:52,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:52,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:52,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:52,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:52,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:52,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:52:52,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:52,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:52,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:52,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:52,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:52,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:52,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:52,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:52,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:52,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:52:52,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:52:52,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-26 20:52:52,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:52,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:52,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:52,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:52:52,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:52,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:52:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:52,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:52,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:52,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 20:52:52,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:52,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 20:52:52,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:52,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:52,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:52,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 20:52:52,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:52:52,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038167935] [2020-10-26 20:52:52,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:52:52,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:52:52,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78768010] [2020-10-26 20:52:52,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:52:52,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:52:52,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:52:52,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:52:52,932 INFO L87 Difference]: Start difference. First operand 1603 states and 2110 transitions. Second operand 8 states. [2020-10-26 20:52:53,216 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:52:55,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:52:55,197 INFO L93 Difference]: Finished difference Result 2474 states and 3340 transitions. [2020-10-26 20:52:55,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:52:55,198 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 202 [2020-10-26 20:52:55,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:52:55,215 INFO L225 Difference]: With dead ends: 2474 [2020-10-26 20:52:55,215 INFO L226 Difference]: Without dead ends: 1581 [2020-10-26 20:52:55,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:52:55,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2020-10-26 20:52:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1579. [2020-10-26 20:52:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-10-26 20:52:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2020 transitions. [2020-10-26 20:52:55,277 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2020 transitions. Word has length 202 [2020-10-26 20:52:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:52:55,277 INFO L481 AbstractCegarLoop]: Abstraction has 1579 states and 2020 transitions. [2020-10-26 20:52:55,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:52:55,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2020 transitions. [2020-10-26 20:52:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-26 20:52:55,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:52:55,282 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 20:52:55,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:52:55,283 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:52:55,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:52:55,283 INFO L82 PathProgramCache]: Analyzing trace with hash 822954675, now seen corresponding path program 1 times [2020-10-26 20:52:55,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:52:55,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650900555] [2020-10-26 20:52:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:52:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:55,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:55,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:56,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:59,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:59,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-26 20:52:59,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:52:59,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4017 [2020-10-26 20:52:59,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:59,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:52:59,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:52:59,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 20:52:59,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:59,653 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:52:59,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:52:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:59,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:59,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:59,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:52:59,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:52:59,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:52:59,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:59,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:52:59,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:52:59,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:52:59,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:59,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:52:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:52:59,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:59,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:52:59,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:52:59,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:52:59,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:52:59,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 20:52:59,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:52:59,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:52:59,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:52:59,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:52:59,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:52:59,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:52:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:00,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:00,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:00,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:53:00,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:00,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-26 20:53:00,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:00,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:00,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:00,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:53:00,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 61 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:53:00,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650900555] [2020-10-26 20:53:00,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:00,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:53:00,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844560956] [2020-10-26 20:53:00,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:53:00,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:00,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:53:00,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:53:00,438 INFO L87 Difference]: Start difference. First operand 1579 states and 2020 transitions. Second operand 8 states. [2020-10-26 20:53:00,700 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:53:02,411 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:53:04,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:04,775 INFO L93 Difference]: Finished difference Result 4396 states and 5871 transitions. [2020-10-26 20:53:04,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:53:04,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 223 [2020-10-26 20:53:04,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:04,794 INFO L225 Difference]: With dead ends: 4396 [2020-10-26 20:53:04,794 INFO L226 Difference]: Without dead ends: 2938 [2020-10-26 20:53:04,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-26 20:53:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-10-26 20:53:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2919. [2020-10-26 20:53:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2919 states. [2020-10-26 20:53:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2919 states to 2919 states and 3839 transitions. [2020-10-26 20:53:04,917 INFO L78 Accepts]: Start accepts. Automaton has 2919 states and 3839 transitions. Word has length 223 [2020-10-26 20:53:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:04,918 INFO L481 AbstractCegarLoop]: Abstraction has 2919 states and 3839 transitions. [2020-10-26 20:53:04,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:53:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2919 states and 3839 transitions. [2020-10-26 20:53:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-26 20:53:04,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:04,926 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, 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] [2020-10-26 20:53:04,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:53:04,926 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:04,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1783151479, now seen corresponding path program 1 times [2020-10-26 20:53:04,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:04,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040140849] [2020-10-26 20:53:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:04,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:05,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:07,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:10,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:10,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-26 20:53:10,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:53:10,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-26 20:53:10,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:10,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:53:10,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:10,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:53:10,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:10,268 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:10,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:10,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:10,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:10,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:10,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:10,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:53:10,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:10,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:10,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:10,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:10,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:53:10,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:10,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:10,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:10,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:53:10,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:10,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-26 20:53:10,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:10,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:10,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:10,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:53:10,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:10,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:53:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:10,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:10,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:10,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:53:10,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:10,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 20:53:10,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:10,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:53:10,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:10,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:53:10,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:10,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:53:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:10,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:10,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:10,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:53:10,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:10,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:53:10,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:10,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:53:10,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:53:10,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:53:10,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 84 proven. 35 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:53:10,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040140849] [2020-10-26 20:53:10,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:10,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:53:10,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184147885] [2020-10-26 20:53:10,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:53:10,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:10,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:53:10,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:53:10,682 INFO L87 Difference]: Start difference. First operand 2919 states and 3839 transitions. Second operand 7 states. [2020-10-26 20:53:10,949 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:53:12,957 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:53:14,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:14,594 INFO L93 Difference]: Finished difference Result 8254 states and 11603 transitions. [2020-10-26 20:53:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:53:14,595 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 245 [2020-10-26 20:53:14,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:14,633 INFO L225 Difference]: With dead ends: 8254 [2020-10-26 20:53:14,633 INFO L226 Difference]: Without dead ends: 5456 [2020-10-26 20:53:14,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:53:14,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5456 states. [2020-10-26 20:53:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5456 to 5345. [2020-10-26 20:53:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5345 states. [2020-10-26 20:53:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5345 states to 5345 states and 7202 transitions. [2020-10-26 20:53:14,867 INFO L78 Accepts]: Start accepts. Automaton has 5345 states and 7202 transitions. Word has length 245 [2020-10-26 20:53:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:14,867 INFO L481 AbstractCegarLoop]: Abstraction has 5345 states and 7202 transitions. [2020-10-26 20:53:14,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:53:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 5345 states and 7202 transitions. [2020-10-26 20:53:14,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-26 20:53:14,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:14,880 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 20:53:14,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:53:14,880 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:14,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1635372047, now seen corresponding path program 1 times [2020-10-26 20:53:14,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:14,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420516416] [2020-10-26 20:53:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:14,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:15,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:15,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:15,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:16,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:16,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:17,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:19,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:19,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:19,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-26 20:53:19,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 20:53:19,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4561 [2020-10-26 20:53:19,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:19,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:19,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:19,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 20:53:19,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:19,771 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:19,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:19,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:19,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:19,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:19,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:19,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:53:19,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:19,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:19,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:19,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:19,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:19,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:19,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:20,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:20,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:20,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:53:20,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:53:20,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-26 20:53:20,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:20,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:20,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:20,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 20:53:20,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:20,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:53:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:20,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:20,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:20,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:20,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:53:20,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:53:20,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:53:20,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:20,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:20,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 20:53:20,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:20,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:53:20,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420516416] [2020-10-26 20:53:20,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:53:20,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 20:53:20,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234139663] [2020-10-26 20:53:20,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:53:20,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:20,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:53:20,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:53:20,234 INFO L87 Difference]: Start difference. First operand 5345 states and 7202 transitions. Second operand 5 states. [2020-10-26 20:53:20,491 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:53:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:53:22,194 INFO L93 Difference]: Finished difference Result 9008 states and 12340 transitions. [2020-10-26 20:53:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:53:22,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 267 [2020-10-26 20:53:22,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:53:22,226 INFO L225 Difference]: With dead ends: 9008 [2020-10-26 20:53:22,227 INFO L226 Difference]: Without dead ends: 5361 [2020-10-26 20:53:22,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:53:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2020-10-26 20:53:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 5345. [2020-10-26 20:53:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5345 states. [2020-10-26 20:53:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5345 states to 5345 states and 7200 transitions. [2020-10-26 20:53:22,440 INFO L78 Accepts]: Start accepts. Automaton has 5345 states and 7200 transitions. Word has length 267 [2020-10-26 20:53:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:53:22,441 INFO L481 AbstractCegarLoop]: Abstraction has 5345 states and 7200 transitions. [2020-10-26 20:53:22,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:53:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 5345 states and 7200 transitions. [2020-10-26 20:53:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-26 20:53:22,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:53:22,453 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-26 20:53:22,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:53:22,454 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:53:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:53:22,454 INFO L82 PathProgramCache]: Analyzing trace with hash 654417233, now seen corresponding path program 1 times [2020-10-26 20:53:22,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:53:22,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490682862] [2020-10-26 20:53:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:53:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:22,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:22,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:25,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:26,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:26,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:27,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:27,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-26 20:53:27,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:53:27,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 20:53:27,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:27,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 20:53:27,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:53:27,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 219 [2020-10-26 20:53:27,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:28,613 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-26 20:53:28,969 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2020-10-26 20:53:29,393 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 85 [2020-10-26 20:53:29,908 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 91 [2020-10-26 20:53:30,382 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 87 [2020-10-26 20:53:30,881 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 81 [2020-10-26 20:53:31,326 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 69 [2020-10-26 20:53:31,768 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 61 [2020-10-26 20:53:32,031 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:53:32,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:53:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:32,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:32,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:32,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:53:32,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:32,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:53:32,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:32,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:53:32,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:53:32,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:53:32,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:32,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:53:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:32,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:32,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:32,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:53:32,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:32,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-26 20:53:32,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:53:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:32,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:53:32,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:32,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:53:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:53:32,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:53:32,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:53:32,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:53:32,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:53:32,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:53:32,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:53:32,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:53:32,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:53:32,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:53:32,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:53:33,426 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 118 [2020-10-26 20:53:33,978 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 134 [2020-10-26 20:53:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 1 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:53:34,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490682862] [2020-10-26 20:53:34,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:53:34,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 20:53:34,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397135433] [2020-10-26 20:53:34,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 20:53:34,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:53:34,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 20:53:34,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-26 20:53:34,748 INFO L87 Difference]: Start difference. First operand 5345 states and 7200 transitions. Second operand 19 states. [2020-10-26 20:53:35,151 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-26 20:53:35,790 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 111 [2020-10-26 20:53:36,852 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 191 [2020-10-26 20:53:40,732 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-26 20:53:41,438 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-26 20:53:42,036 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 57 [2020-10-26 20:53:43,042 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 81 [2020-10-26 20:53:44,490 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 306 DAG size of output: 217 [2020-10-26 20:53:46,021 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 326 DAG size of output: 237 [2020-10-26 20:53:48,606 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 334 DAG size of output: 234 [2020-10-26 20:53:51,520 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 337 DAG size of output: 231 [2020-10-26 20:53:52,681 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 107 [2020-10-26 20:53:53,243 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 123 [2020-10-26 20:53:55,583 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 191 [2020-10-26 20:53:57,969 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 338 DAG size of output: 228 [2020-10-26 20:54:01,798 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 341 DAG size of output: 225 [2020-10-26 20:54:04,188 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 343 DAG size of output: 220 [2020-10-26 20:54:04,920 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 97 [2020-10-26 20:54:12,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:54:12,381 INFO L93 Difference]: Finished difference Result 14256 states and 19846 transitions. [2020-10-26 20:54:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 20:54:12,382 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 267 [2020-10-26 20:54:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:54:12,438 INFO L225 Difference]: With dead ends: 14256 [2020-10-26 20:54:12,438 INFO L226 Difference]: Without dead ends: 9032 [2020-10-26 20:54:12,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=297, Invalid=1185, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 20:54:12,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9032 states. [2020-10-26 20:54:12,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9032 to 8713. [2020-10-26 20:54:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8713 states. [2020-10-26 20:54:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8713 states to 8713 states and 11438 transitions. [2020-10-26 20:54:12,767 INFO L78 Accepts]: Start accepts. Automaton has 8713 states and 11438 transitions. Word has length 267 [2020-10-26 20:54:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:54:12,768 INFO L481 AbstractCegarLoop]: Abstraction has 8713 states and 11438 transitions. [2020-10-26 20:54:12,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 20:54:12,769 INFO L276 IsEmpty]: Start isEmpty. Operand 8713 states and 11438 transitions. [2020-10-26 20:54:12,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-10-26 20:54:12,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:54:12,793 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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] [2020-10-26 20:54:12,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:54:12,793 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:54:12,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:54:12,794 INFO L82 PathProgramCache]: Analyzing trace with hash 665011210, now seen corresponding path program 1 times [2020-10-26 20:54:12,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:54:12,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001684867] [2020-10-26 20:54:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:54:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:12,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:13,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:13,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:14,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:14,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:17,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:17,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 302 [2020-10-26 20:54:17,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:54:17,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 20:54:17,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:17,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 20:54:17,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:54:17,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 286 [2020-10-26 20:54:17,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:19,284 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:54:19,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:54:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:19,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:19,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:19,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:54:19,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:19,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:54:19,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:54:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:54:19,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:54:19,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:19,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:54:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:19,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:19,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:19,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 20:54:19,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:19,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-26 20:54:19,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:19,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:54:19,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:19,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 20:54:19,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:20,180 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-26 20:54:20,499 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-26 20:54:20,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 20:54:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:20,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:20,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:20,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:54:20,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:20,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:54:20,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:54:20,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:20,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 20:54:20,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:21,253 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-26 20:54:22,070 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 115 [2020-10-26 20:54:22,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-26 20:54:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:54:22,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:54:22,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:54:22,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 20:54:22,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:54:22,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 20:54:22,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:54:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:54:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:54:22,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 20:54:22,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:54:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:54:23,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001684867] [2020-10-26 20:54:23,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:54:23,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 20:54:23,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060293184] [2020-10-26 20:54:23,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 20:54:23,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:54:23,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 20:54:23,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-26 20:54:23,597 INFO L87 Difference]: Start difference. First operand 8713 states and 11438 transitions. Second operand 22 states. [2020-10-26 20:54:23,984 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-26 20:54:25,458 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2020-10-26 20:54:26,900 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-26 20:54:27,296 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 50 [2020-10-26 20:54:28,061 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-26 20:54:28,398 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-26 20:54:29,497 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 87 [2020-10-26 20:54:29,839 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-26 20:54:30,302 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-26 20:54:31,471 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 218 DAG size of output: 198 [2020-10-26 20:54:32,680 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 230 DAG size of output: 206 [2020-10-26 20:54:33,034 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 42 [2020-10-26 20:54:34,289 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 74 [2020-10-26 20:54:35,273 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 95 [2020-10-26 20:54:35,814 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-26 20:54:37,351 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 228 DAG size of output: 205 [2020-10-26 20:54:38,852 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 226 DAG size of output: 204 [2020-10-26 20:54:42,285 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 227 DAG size of output: 203 [2020-10-26 20:54:42,923 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 104 [2020-10-26 20:54:46,373 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 92 [2020-10-26 20:54:49,578 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 103 [2020-10-26 20:54:51,180 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 228 DAG size of output: 202 [2020-10-26 20:54:52,455 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 102 [2020-10-26 20:54:54,065 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 228 DAG size of output: 201 [2020-10-26 20:54:54,438 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 72 [2020-10-26 20:54:54,907 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 84 [2020-10-26 20:54:56,232 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2020-10-26 20:54:58,329 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 67 [2020-10-26 20:54:59,072 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2020-10-26 20:55:00,688 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 209 DAG size of output: 187 [2020-10-26 20:55:01,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:55:01,657 INFO L93 Difference]: Finished difference Result 21176 states and 29418 transitions. [2020-10-26 20:55:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 20:55:01,658 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 286 [2020-10-26 20:55:01,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:55:01,719 INFO L225 Difference]: With dead ends: 21176 [2020-10-26 20:55:01,720 INFO L226 Difference]: Without dead ends: 16877 [2020-10-26 20:55:01,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=731, Invalid=2349, Unknown=0, NotChecked=0, Total=3080 [2020-10-26 20:55:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16877 states. [2020-10-26 20:55:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16877 to 16600. [2020-10-26 20:55:02,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16600 states. [2020-10-26 20:55:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16600 states to 16600 states and 22041 transitions. [2020-10-26 20:55:02,372 INFO L78 Accepts]: Start accepts. Automaton has 16600 states and 22041 transitions. Word has length 286 [2020-10-26 20:55:02,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:55:02,373 INFO L481 AbstractCegarLoop]: Abstraction has 16600 states and 22041 transitions. [2020-10-26 20:55:02,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 20:55:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 16600 states and 22041 transitions. [2020-10-26 20:55:02,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-10-26 20:55:02,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:55:02,404 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, 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] [2020-10-26 20:55:02,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:55:02,404 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:55:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:55:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash -72929421, now seen corresponding path program 1 times [2020-10-26 20:55:02,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:55:02,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221641766] [2020-10-26 20:55:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:55:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:02,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:02,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:05,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:05,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-26 20:55:05,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:55:05,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2608 [2020-10-26 20:55:05,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 20:55:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:55:05,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 279 [2020-10-26 20:55:05,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:06,358 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-10-26 20:55:06,620 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:55:06,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:55:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:06,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:06,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:06,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:55:06,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:06,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:55:06,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:06,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:55:06,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:55:06,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:55:06,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:06,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:55:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:06,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:06,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:06,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:55:06,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:06,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:55:06,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:06,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:55:06,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:06,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:55:06,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:07,083 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-26 20:55:07,382 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2020-10-26 20:55:07,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:55:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:55:07,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:55:07,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:55:07,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 20:55:07,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:55:07,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-26 20:55:07,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:55:07,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:55:07,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:55:07,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-26 20:55:07,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:55:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 3 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:55:09,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221641766] [2020-10-26 20:55:09,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:55:09,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 20:55:09,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127987245] [2020-10-26 20:55:09,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 20:55:09,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:55:09,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 20:55:09,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-26 20:55:09,110 INFO L87 Difference]: Start difference. First operand 16600 states and 22041 transitions. Second operand 19 states. [2020-10-26 20:55:09,992 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 177 [2020-10-26 20:55:10,508 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 70