/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/Problem15_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:40:32,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:40:32,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:40:32,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:40:32,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:40:32,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:40:32,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:40:32,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:40:32,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:40:32,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:40:32,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:40:32,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:40:32,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:40:32,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:40:32,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:40:32,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:40:32,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:40:32,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:40:32,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:40:32,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:40:32,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:40:32,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:40:32,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:40:32,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:40:32,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:40:32,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:40:32,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:40:32,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:40:32,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:40:32,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:40:32,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:40:32,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:40:32,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:40:32,447 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:40:32,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:40:32,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:40:32,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:40:32,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:40:32,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:40:32,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:40:32,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:40:32,460 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 23:40:32,510 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:40:32,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:40:32,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:40:32,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:40:32,515 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:40:32,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:40:32,516 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:40:32,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:40:32,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:40:32,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:40:32,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:40:32,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:40:32,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:40:32,519 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:40:32,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:40:32,519 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:40:32,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:40:32,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:40:32,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:40:32,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:40:32,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:40:32,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:40:32,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:40:32,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:40:32,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:40:32,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:40:32,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:40:32,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:40:32,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:40:32,522 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:40:32,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:40:33,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:40:33,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:40:33,027 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:40:33,028 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:40:33,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label25.c [2020-10-26 23:40:33,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fd7bb7bf/120936ea98554168bc5fcb2bd9af608a/FLAG3c56b4bc3 [2020-10-26 23:40:34,180 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:40:34,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label25.c [2020-10-26 23:40:34,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fd7bb7bf/120936ea98554168bc5fcb2bd9af608a/FLAG3c56b4bc3 [2020-10-26 23:40:34,713 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6fd7bb7bf/120936ea98554168bc5fcb2bd9af608a [2020-10-26 23:40:34,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:40:34,724 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:40:34,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:40:34,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:40:34,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:40:34,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:40:34" (1/1) ... [2020-10-26 23:40:34,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27bfbf7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:34, skipping insertion in model container [2020-10-26 23:40:34,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:40:34" (1/1) ... [2020-10-26 23:40:34,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:40:34,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:40:35,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:40:35,687 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:40:36,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:40:36,044 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:40:36,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:36 WrapperNode [2020-10-26 23:40:36,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:40:36,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:40:36,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:40:36,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:40:36,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:36" (1/1) ... [2020-10-26 23:40:36,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:36" (1/1) ... [2020-10-26 23:40:36,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:36" (1/1) ... [2020-10-26 23:40:36,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:36" (1/1) ... [2020-10-26 23:40:36,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:36" (1/1) ... [2020-10-26 23:40:36,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:36" (1/1) ... [2020-10-26 23:40:36,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:36" (1/1) ... [2020-10-26 23:40:36,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:40:36,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:40:36,308 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:40:36,308 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:40:36,309 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:36" (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 23:40:36,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:40:36,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:40:36,419 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:40:36,420 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:40:36,420 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:40:36,421 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:40:36,422 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:40:36,422 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:40:36,423 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:40:36,423 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:40:36,424 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:40:36,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:40:36,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:40:36,425 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:40:36,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:40:36,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:40:36,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:40:36,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:40:36,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:40:36,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:40:36,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:40:40,360 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:40:40,360 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:40:40,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:40:40 BoogieIcfgContainer [2020-10-26 23:40:40,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:40:40,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:40:40,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:40:40,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:40:40,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:40:34" (1/3) ... [2020-10-26 23:40:40,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9d45cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:40:40, skipping insertion in model container [2020-10-26 23:40:40,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:40:36" (2/3) ... [2020-10-26 23:40:40,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9d45cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:40:40, skipping insertion in model container [2020-10-26 23:40:40,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:40:40" (3/3) ... [2020-10-26 23:40:40,378 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label25.c [2020-10-26 23:40:40,395 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:40:40,403 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:40:40,421 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:40:40,480 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:40:40,481 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:40:40,481 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:40:40,481 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:40:40,481 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:40:40,481 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:40:40,481 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:40:40,482 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:40:40,534 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-26 23:40:40,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 23:40:40,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:40,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:40:40,548 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash 415000807, now seen corresponding path program 1 times [2020-10-26 23:40:40,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:40,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665994960] [2020-10-26 23:40:40,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:40,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:41,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:41,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 23:40:41,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:41,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-26 23:40:41,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:41,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:40:41,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:41,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 23:40:41,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:40:41,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:41,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:41,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:41,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:41,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:41,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 23:40:41,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:41,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:41,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:41,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:41,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:40:41,743 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 23:40:41,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665994960] [2020-10-26 23:40:41,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:40:41,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 23:40:41,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157240843] [2020-10-26 23:40:41,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 23:40:41,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:41,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 23:40:41,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 23:40:41,785 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-26 23:40:48,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:40:48,401 INFO L93 Difference]: Finished difference Result 1208 states and 2172 transitions. [2020-10-26 23:40:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:40:48,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-26 23:40:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:40:48,427 INFO L225 Difference]: With dead ends: 1208 [2020-10-26 23:40:48,428 INFO L226 Difference]: Without dead ends: 703 [2020-10-26 23:40:48,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:40:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2020-10-26 23:40:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 697. [2020-10-26 23:40:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2020-10-26 23:40:48,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1016 transitions. [2020-10-26 23:40:48,611 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1016 transitions. Word has length 31 [2020-10-26 23:40:48,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:40:48,613 INFO L481 AbstractCegarLoop]: Abstraction has 697 states and 1016 transitions. [2020-10-26 23:40:48,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 23:40:48,613 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1016 transitions. [2020-10-26 23:40:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-26 23:40:48,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:40:48,626 INFO L422 BasicCegarLoop]: trace histogram [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 23:40:48,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:40:48,627 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:40:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:40:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash 256858956, now seen corresponding path program 1 times [2020-10-26 23:40:48,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:40:48,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559161773] [2020-10-26 23:40:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:40:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:48,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:49,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:50,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:50,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:50,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 23:40:50,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:40:50,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1699 [2020-10-26 23:40:50,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:40:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:40:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 23:40:50,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:40:50,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:40:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:50,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:50,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:50,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:40:50,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:50,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 23:40:50,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:50,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:40:50,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:40:50,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:40:50,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:50,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:40:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:40:50,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:40:50,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:40:50,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 23:40:50,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:40:50,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-26 23:40:50,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:40:50,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:40:50,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:40:50,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 23:40:50,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:40:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:40:50,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559161773] [2020-10-26 23:40:50,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:40:50,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:40:50,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594287573] [2020-10-26 23:40:50,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:40:50,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:40:50,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:40:50,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:40:50,995 INFO L87 Difference]: Start difference. First operand 697 states and 1016 transitions. Second operand 7 states. [2020-10-26 23:41:04,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:04,560 INFO L93 Difference]: Finished difference Result 2072 states and 3049 transitions. [2020-10-26 23:41:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:41:04,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-10-26 23:41:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:04,578 INFO L225 Difference]: With dead ends: 2072 [2020-10-26 23:41:04,579 INFO L226 Difference]: Without dead ends: 1381 [2020-10-26 23:41:04,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:41:04,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2020-10-26 23:41:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1360. [2020-10-26 23:41:04,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2020-10-26 23:41:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1889 transitions. [2020-10-26 23:41:04,711 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1889 transitions. Word has length 110 [2020-10-26 23:41:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:04,717 INFO L481 AbstractCegarLoop]: Abstraction has 1360 states and 1889 transitions. [2020-10-26 23:41:04,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:41:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1889 transitions. [2020-10-26 23:41:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-26 23:41:04,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:04,734 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 23:41:04,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:41:04,734 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:04,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1560468204, now seen corresponding path program 1 times [2020-10-26 23:41:04,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:04,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039821610] [2020-10-26 23:41:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:04,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:05,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:05,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:05,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-26 23:41:05,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:41:05,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1166 [2020-10-26 23:41:05,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:05,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:41:05,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:41:05,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-26 23:41:05,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:06,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:06,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:06,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:06,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:06,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:06,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:41:06,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:06,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:06,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:06,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:41:06,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:41:06,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:06,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:06,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:06,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 23:41:06,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:06,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-26 23:41:06,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:06,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:06,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:06,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 23:41:06,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:41:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:41:06,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039821610] [2020-10-26 23:41:06,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:41:06,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:41:06,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835357228] [2020-10-26 23:41:06,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:41:06,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:06,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:41:06,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:41:06,535 INFO L87 Difference]: Start difference. First operand 1360 states and 1889 transitions. Second operand 7 states. [2020-10-26 23:41:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:16,526 INFO L93 Difference]: Finished difference Result 4040 states and 5668 transitions. [2020-10-26 23:41:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:41:16,528 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2020-10-26 23:41:16,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:16,546 INFO L225 Difference]: With dead ends: 4040 [2020-10-26 23:41:16,547 INFO L226 Difference]: Without dead ends: 2686 [2020-10-26 23:41:16,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:41:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2020-10-26 23:41:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2312. [2020-10-26 23:41:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-10-26 23:41:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2963 transitions. [2020-10-26 23:41:16,656 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2963 transitions. Word has length 114 [2020-10-26 23:41:16,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:16,657 INFO L481 AbstractCegarLoop]: Abstraction has 2312 states and 2963 transitions. [2020-10-26 23:41:16,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:41:16,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2963 transitions. [2020-10-26 23:41:16,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-26 23:41:16,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:16,662 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:41:16,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:41:16,663 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:16,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:16,663 INFO L82 PathProgramCache]: Analyzing trace with hash -283059918, now seen corresponding path program 1 times [2020-10-26 23:41:16,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:16,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874978370] [2020-10-26 23:41:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:16,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:16,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:18,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:20,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:20,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-26 23:41:20,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:41:20,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3768 [2020-10-26 23:41:20,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:41:20,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:41:20,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 23:41:20,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:20,777 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:41:20,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:20,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:20,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:20,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:20,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:20,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 23:41:20,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:20,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:41:20,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:20,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:20,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:21,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:21,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:41:21,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:21,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-26 23:41:21,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:21,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:21,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:21,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:41:21,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:41:22,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874978370] [2020-10-26 23:41:22,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:41:22,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 23:41:22,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254711855] [2020-10-26 23:41:22,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:41:22,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:22,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:41:22,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:41:22,079 INFO L87 Difference]: Start difference. First operand 2312 states and 2963 transitions. Second operand 8 states. [2020-10-26 23:41:32,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:32,027 INFO L93 Difference]: Finished difference Result 4974 states and 6313 transitions. [2020-10-26 23:41:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:41:32,033 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 231 [2020-10-26 23:41:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:32,057 INFO L225 Difference]: With dead ends: 4974 [2020-10-26 23:41:32,057 INFO L226 Difference]: Without dead ends: 2668 [2020-10-26 23:41:32,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:41:32,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2020-10-26 23:41:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2628. [2020-10-26 23:41:32,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2628 states. [2020-10-26 23:41:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 3291 transitions. [2020-10-26 23:41:32,159 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 3291 transitions. Word has length 231 [2020-10-26 23:41:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:32,160 INFO L481 AbstractCegarLoop]: Abstraction has 2628 states and 3291 transitions. [2020-10-26 23:41:32,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:41:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 3291 transitions. [2020-10-26 23:41:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-26 23:41:32,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:32,167 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:41:32,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:41:32,168 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:32,169 INFO L82 PathProgramCache]: Analyzing trace with hash 703487091, now seen corresponding path program 1 times [2020-10-26 23:41:32,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:32,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128699959] [2020-10-26 23:41:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:32,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:33,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:34,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:34,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-26 23:41:34,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:41:34,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2096 [2020-10-26 23:41:34,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:34,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:41:34,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:41:34,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 320 [2020-10-26 23:41:34,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:34,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:34,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:34,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:34,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:34,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:34,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:41:34,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:34,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:41:34,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:41:34,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:34,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:35,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:35,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:41:35,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:35,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 616 [2020-10-26 23:41:35,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:35,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:35,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:35,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 287 [2020-10-26 23:41:35,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:41:35,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128699959] [2020-10-26 23:41:35,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:41:35,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:41:35,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888020743] [2020-10-26 23:41:35,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 23:41:35,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:35,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 23:41:35,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:41:35,810 INFO L87 Difference]: Start difference. First operand 2628 states and 3291 transitions. Second operand 6 states. [2020-10-26 23:41:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:41:44,802 INFO L93 Difference]: Finished difference Result 5602 states and 7421 transitions. [2020-10-26 23:41:44,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:41:44,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 317 [2020-10-26 23:41:44,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:41:44,836 INFO L225 Difference]: With dead ends: 5602 [2020-10-26 23:41:44,838 INFO L226 Difference]: Without dead ends: 4227 [2020-10-26 23:41:44,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:41:44,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2020-10-26 23:41:45,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 4200. [2020-10-26 23:41:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4200 states. [2020-10-26 23:41:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 5106 transitions. [2020-10-26 23:41:45,051 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 5106 transitions. Word has length 317 [2020-10-26 23:41:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:41:45,053 INFO L481 AbstractCegarLoop]: Abstraction has 4200 states and 5106 transitions. [2020-10-26 23:41:45,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 23:41:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 5106 transitions. [2020-10-26 23:41:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-26 23:41:45,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:41:45,064 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:41:45,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:41:45,064 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:41:45,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:41:45,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1519807710, now seen corresponding path program 1 times [2020-10-26 23:41:45,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:41:45,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330027267] [2020-10-26 23:41:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:41:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:45,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:45,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:45,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:46,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:46,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:50,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:50,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 340 [2020-10-26 23:41:50,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:41:50,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-26 23:41:50,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:50,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 23:41:50,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:41:50,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 331 [2020-10-26 23:41:50,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:41:50,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:41:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:50,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:50,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:50,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:41:50,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:50,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 23:41:50,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:50,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:41:50,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:41:50,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:41:50,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:41:50,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:41:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:50,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:50,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:50,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:41:50,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:41:50,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 23:41:50,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:50,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:41:50,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:50,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 23:41:50,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:50,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:41:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:41:50,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:51,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:41:51,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:41:51,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:41:51,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:41:51,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 986 [2020-10-26 23:41:51,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:41:51,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:41:51,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:41:51,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:41:51,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:41:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 19 proven. 118 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:41:53,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330027267] [2020-10-26 23:41:53,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:41:53,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 23:41:53,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069485378] [2020-10-26 23:41:53,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 23:41:53,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:41:53,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 23:41:53,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:41:53,231 INFO L87 Difference]: Start difference. First operand 4200 states and 5106 transitions. Second operand 12 states. [2020-10-26 23:41:53,409 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-10-26 23:41:54,963 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2020-10-26 23:41:55,805 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2020-10-26 23:41:57,566 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-10-26 23:41:57,920 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2020-10-26 23:41:58,453 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-26 23:41:58,775 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2020-10-26 23:42:00,173 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-26 23:42:00,625 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-26 23:42:04,403 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2020-10-26 23:42:09,004 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-26 23:42:13,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:42:13,798 INFO L93 Difference]: Finished difference Result 9592 states and 12165 transitions. [2020-10-26 23:42:13,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 23:42:13,801 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 326 [2020-10-26 23:42:13,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:42:13,844 INFO L225 Difference]: With dead ends: 9592 [2020-10-26 23:42:13,844 INFO L226 Difference]: Without dead ends: 7269 [2020-10-26 23:42:13,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=337, Invalid=923, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 23:42:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7269 states. [2020-10-26 23:42:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7269 to 6115. [2020-10-26 23:42:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6115 states. [2020-10-26 23:42:14,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6115 states to 6115 states and 7545 transitions. [2020-10-26 23:42:14,066 INFO L78 Accepts]: Start accepts. Automaton has 6115 states and 7545 transitions. Word has length 326 [2020-10-26 23:42:14,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:42:14,067 INFO L481 AbstractCegarLoop]: Abstraction has 6115 states and 7545 transitions. [2020-10-26 23:42:14,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 23:42:14,067 INFO L276 IsEmpty]: Start isEmpty. Operand 6115 states and 7545 transitions. [2020-10-26 23:42:14,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-10-26 23:42:14,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:42:14,078 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:14,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:42:14,079 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:42:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:42:14,080 INFO L82 PathProgramCache]: Analyzing trace with hash -294577460, now seen corresponding path program 1 times [2020-10-26 23:42:14,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:42:14,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374467871] [2020-10-26 23:42:14,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:42:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:14,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:14,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:16,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:16,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-10-26 23:42:16,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:42:16,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2765 [2020-10-26 23:42:16,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:16,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:16,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-26 23:42:16,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 23:42:16,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:42:17,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:42:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:17,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:17,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:17,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:42:17,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:17,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:42:17,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:17,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:17,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:17,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:17,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:17,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:42:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:17,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:17,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:17,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:42:17,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:17,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-26 23:42:17,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:17,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:42:17,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:17,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-26 23:42:17,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:17,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:42:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:17,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:17,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:17,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 23:42:17,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:17,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-26 23:42:17,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:17,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:17,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:17,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 23:42:17,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:42:18,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374467871] [2020-10-26 23:42:18,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:18,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:42:18,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472329248] [2020-10-26 23:42:18,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:42:18,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:18,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:42:18,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:42:18,315 INFO L87 Difference]: Start difference. First operand 6115 states and 7545 transitions. Second operand 7 states. [2020-10-26 23:42:32,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:42:32,038 INFO L93 Difference]: Finished difference Result 14185 states and 18375 transitions. [2020-10-26 23:42:32,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:42:32,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 402 [2020-10-26 23:42:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:42:32,090 INFO L225 Difference]: With dead ends: 14185 [2020-10-26 23:42:32,090 INFO L226 Difference]: Without dead ends: 8692 [2020-10-26 23:42:32,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:42:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8692 states. [2020-10-26 23:42:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8692 to 8625. [2020-10-26 23:42:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8625 states. [2020-10-26 23:42:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8625 states to 8625 states and 10587 transitions. [2020-10-26 23:42:32,369 INFO L78 Accepts]: Start accepts. Automaton has 8625 states and 10587 transitions. Word has length 402 [2020-10-26 23:42:32,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:42:32,370 INFO L481 AbstractCegarLoop]: Abstraction has 8625 states and 10587 transitions. [2020-10-26 23:42:32,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:42:32,371 INFO L276 IsEmpty]: Start isEmpty. Operand 8625 states and 10587 transitions. [2020-10-26 23:42:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-10-26 23:42:32,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:42:32,382 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 23:42:32,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 23:42:32,382 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:42:32,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:42:32,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1520835775, now seen corresponding path program 1 times [2020-10-26 23:42:32,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:42:32,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482088526] [2020-10-26 23:42:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:42:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:32,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:32,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:33,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:33,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:35,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:37,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:37,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 427 [2020-10-26 23:42:37,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:42:37,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-26 23:42:37,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:37,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:37,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:42:37,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 203 [2020-10-26 23:42:37,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:37,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:42:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:37,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:37,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:37,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:42:37,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:37,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:42:37,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:37,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:37,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:37,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:37,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:37,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:42:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:37,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:37,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:37,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 23:42:37,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:37,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-26 23:42:37,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:37,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:42:37,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:37,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 23:42:37,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:37,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-26 23:42:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:37,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:38,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:38,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-26 23:42:38,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:38,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-26 23:42:38,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:38,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:38,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:38,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-26 23:42:38,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:38,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 303 [2020-10-26 23:42:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:38,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:38,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:38,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 23:42:38,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:38,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 23:42:38,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:38,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:38,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-26 23:42:38,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:38,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 165 proven. 84 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-26 23:42:38,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482088526] [2020-10-26 23:42:38,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:38,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:42:38,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129584366] [2020-10-26 23:42:38,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:42:38,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:38,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:42:38,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:42:38,671 INFO L87 Difference]: Start difference. First operand 8625 states and 10587 transitions. Second operand 7 states. [2020-10-26 23:42:50,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:42:50,521 INFO L93 Difference]: Finished difference Result 18607 states and 23811 transitions. [2020-10-26 23:42:50,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:42:50,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 411 [2020-10-26 23:42:50,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:42:50,561 INFO L225 Difference]: With dead ends: 18607 [2020-10-26 23:42:50,561 INFO L226 Difference]: Without dead ends: 10266 [2020-10-26 23:42:50,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:42:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10266 states. [2020-10-26 23:42:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10266 to 9272. [2020-10-26 23:42:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9272 states. [2020-10-26 23:42:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9272 states to 9272 states and 11133 transitions. [2020-10-26 23:42:50,837 INFO L78 Accepts]: Start accepts. Automaton has 9272 states and 11133 transitions. Word has length 411 [2020-10-26 23:42:50,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:42:50,838 INFO L481 AbstractCegarLoop]: Abstraction has 9272 states and 11133 transitions. [2020-10-26 23:42:50,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:42:50,838 INFO L276 IsEmpty]: Start isEmpty. Operand 9272 states and 11133 transitions. [2020-10-26 23:42:50,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2020-10-26 23:42:50,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:42:50,848 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:50,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 23:42:50,848 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:42:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:42:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2027043590, now seen corresponding path program 1 times [2020-10-26 23:42:50,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:42:50,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193273231] [2020-10-26 23:42:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:42:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:51,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:51,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:53,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:53,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 430 [2020-10-26 23:42:53,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:42:53,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2159 [2020-10-26 23:42:53,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:53,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:53,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-26 23:42:53,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 23:42:53,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:53,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:42:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:53,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:53,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:53,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:42:53,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:53,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:42:53,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:53,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:42:53,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:53,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:42:53,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:53,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:42:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:53,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:53,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:53,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 23:42:53,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:53,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-26 23:42:53,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:53,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:42:53,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:42:53,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-26 23:42:53,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:53,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-26 23:42:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:42:53,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:42:53,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:42:53,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:42:53,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:42:53,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-26 23:42:53,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:42:53,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:42:53,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:42:53,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:42:53,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:42:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:42:54,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193273231] [2020-10-26 23:42:54,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:42:54,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 23:42:54,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979420626] [2020-10-26 23:42:54,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:42:54,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:42:54,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:42:54,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:42:54,388 INFO L87 Difference]: Start difference. First operand 9272 states and 11133 transitions. Second operand 8 states. [2020-10-26 23:43:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:43:06,274 INFO L93 Difference]: Finished difference Result 20487 states and 24678 transitions. [2020-10-26 23:43:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:43:06,281 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 416 [2020-10-26 23:43:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:43:06,318 INFO L225 Difference]: With dead ends: 20487 [2020-10-26 23:43:06,318 INFO L226 Difference]: Without dead ends: 11837 [2020-10-26 23:43:06,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 23:43:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2020-10-26 23:43:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 11487. [2020-10-26 23:43:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11487 states. [2020-10-26 23:43:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11487 states to 11487 states and 13628 transitions. [2020-10-26 23:43:06,619 INFO L78 Accepts]: Start accepts. Automaton has 11487 states and 13628 transitions. Word has length 416 [2020-10-26 23:43:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:43:06,620 INFO L481 AbstractCegarLoop]: Abstraction has 11487 states and 13628 transitions. [2020-10-26 23:43:06,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:43:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 11487 states and 13628 transitions. [2020-10-26 23:43:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-10-26 23:43:06,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:43:06,625 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:06,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 23:43:06,626 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:43:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:43:06,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1852745742, now seen corresponding path program 1 times [2020-10-26 23:43:06,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:43:06,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665213669] [2020-10-26 23:43:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:43:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:06,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:07,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:07,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 442 [2020-10-26 23:43:07,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:07,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 792 [2020-10-26 23:43:07,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:07,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:07,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:43:07,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 23:43:07,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:07,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:43:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:07,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:07,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:07,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:43:07,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:07,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 23:43:07,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:07,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:07,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:07,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:07,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:07,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:43:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:07,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:07,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:07,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:43:07,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:07,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 23:43:07,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:07,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:07,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:07,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:07,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:08,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:43:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:08,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:08,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:08,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:43:08,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:08,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-26 23:43:08,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:08,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:43:08,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:08,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:43:08,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-26 23:43:08,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665213669] [2020-10-26 23:43:08,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:43:08,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:43:08,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29428501] [2020-10-26 23:43:08,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:43:08,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:43:08,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:43:08,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:43:08,342 INFO L87 Difference]: Start difference. First operand 11487 states and 13628 transitions. Second operand 5 states. [2020-10-26 23:43:17,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:43:17,182 INFO L93 Difference]: Finished difference Result 25143 states and 30839 transitions. [2020-10-26 23:43:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:43:17,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 428 [2020-10-26 23:43:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:43:17,231 INFO L225 Difference]: With dead ends: 25143 [2020-10-26 23:43:17,232 INFO L226 Difference]: Without dead ends: 14278 [2020-10-26 23:43:17,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:43:17,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14278 states. [2020-10-26 23:43:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14278 to 14274. [2020-10-26 23:43:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14274 states. [2020-10-26 23:43:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14274 states to 14274 states and 16884 transitions. [2020-10-26 23:43:17,630 INFO L78 Accepts]: Start accepts. Automaton has 14274 states and 16884 transitions. Word has length 428 [2020-10-26 23:43:17,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:43:17,632 INFO L481 AbstractCegarLoop]: Abstraction has 14274 states and 16884 transitions. [2020-10-26 23:43:17,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:43:17,632 INFO L276 IsEmpty]: Start isEmpty. Operand 14274 states and 16884 transitions. [2020-10-26 23:43:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2020-10-26 23:43:17,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:43:17,641 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:43:17,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 23:43:17,642 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:43:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:43:17,642 INFO L82 PathProgramCache]: Analyzing trace with hash 37650589, now seen corresponding path program 1 times [2020-10-26 23:43:17,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:43:17,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419132525] [2020-10-26 23:43:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:43:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:17,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:18,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:18,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:20,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:22,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:22,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 535 [2020-10-26 23:43:22,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:43:22,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 23:43:22,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:22,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 23:43:22,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-26 23:43:22,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 23:43:22,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:23,149 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-26 23:43:23,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:43:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:23,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:23,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:23,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:43:23,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:23,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 23:43:23,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:23,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:43:23,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:43:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:23,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:23,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:23,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:43:23,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:23,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-26 23:43:23,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:43:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:23,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-26 23:43:23,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:23,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:43:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:23,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:24,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:24,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:43:24,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:24,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-26 23:43:24,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:24,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 23:43:24,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:43:24,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-26 23:43:24,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:24,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:43:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:24,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:24,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:24,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:24,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 23:43:24,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:43:24,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-26 23:43:24,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:24,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:24,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:43:24,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-26 23:43:24,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 263 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 23:43:24,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419132525] [2020-10-26 23:43:24,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:43:24,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 23:43:24,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306473412] [2020-10-26 23:43:24,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 23:43:24,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:43:24,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 23:43:24,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:43:24,561 INFO L87 Difference]: Start difference. First operand 14274 states and 16884 transitions. Second operand 10 states. [2020-10-26 23:43:29,023 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-26 23:43:30,050 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:43:30,961 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-26 23:43:48,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:43:48,740 INFO L93 Difference]: Finished difference Result 29310 states and 35929 transitions. [2020-10-26 23:43:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 23:43:48,744 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 519 [2020-10-26 23:43:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:43:48,814 INFO L225 Difference]: With dead ends: 29310 [2020-10-26 23:43:48,814 INFO L226 Difference]: Without dead ends: 18459 [2020-10-26 23:43:48,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=303, Invalid=1337, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 23:43:48,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18459 states. [2020-10-26 23:43:49,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18459 to 18436. [2020-10-26 23:43:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18436 states. [2020-10-26 23:43:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18436 states to 18436 states and 21930 transitions. [2020-10-26 23:43:49,334 INFO L78 Accepts]: Start accepts. Automaton has 18436 states and 21930 transitions. Word has length 519 [2020-10-26 23:43:49,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:43:49,335 INFO L481 AbstractCegarLoop]: Abstraction has 18436 states and 21930 transitions. [2020-10-26 23:43:49,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 23:43:49,335 INFO L276 IsEmpty]: Start isEmpty. Operand 18436 states and 21930 transitions. [2020-10-26 23:43:49,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2020-10-26 23:43:49,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:43:49,346 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:43:49,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 23:43:49,347 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:43:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:43:49,347 INFO L82 PathProgramCache]: Analyzing trace with hash 73405062, now seen corresponding path program 1 times [2020-10-26 23:43:49,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:43:49,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645149173] [2020-10-26 23:43:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:43:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:49,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:49,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:50,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:51,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:53,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:53,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:54,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:54,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 572 [2020-10-26 23:43:54,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 23:43:54,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4540 [2020-10-26 23:43:54,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-26 23:43:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-26 23:43:54,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:54,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:43:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:54,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:54,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:54,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:43:54,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:54,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 23:43:54,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:54,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:54,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:43:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:54,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:54,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:54,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-26 23:43:54,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:54,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-26 23:43:54,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:54,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:43:54,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:54,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:43:54,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:54,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-26 23:43:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:54,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:54,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:54,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 23:43:54,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:43:54,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 23:43:54,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:54,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:43:54,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:43:54,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:43:54,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:54,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-26 23:43:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:43:54,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:54,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:43:54,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:43:54,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 23:43:54,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:43:54,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-26 23:43:54,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:43:54,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:43:54,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:43:54,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-26 23:43:54,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:43:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 305 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-26 23:43:55,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645149173] [2020-10-26 23:43:55,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:43:55,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:43:55,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115119737] [2020-10-26 23:43:55,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:43:55,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:43:55,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:43:55,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:43:55,200 INFO L87 Difference]: Start difference. First operand 18436 states and 21930 transitions. Second operand 7 states. [2020-10-26 23:44:07,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:44:07,812 INFO L93 Difference]: Finished difference Result 36381 states and 45467 transitions. [2020-10-26 23:44:07,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:44:07,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 556 [2020-10-26 23:44:07,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:44:07,902 INFO L225 Difference]: With dead ends: 36381 [2020-10-26 23:44:07,902 INFO L226 Difference]: Without dead ends: 21063 [2020-10-26 23:44:07,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:44:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21063 states. [2020-10-26 23:44:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21063 to 20956. [2020-10-26 23:44:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20956 states. [2020-10-26 23:44:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20956 states to 20956 states and 24679 transitions. [2020-10-26 23:44:08,432 INFO L78 Accepts]: Start accepts. Automaton has 20956 states and 24679 transitions. Word has length 556 [2020-10-26 23:44:08,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:44:08,432 INFO L481 AbstractCegarLoop]: Abstraction has 20956 states and 24679 transitions. [2020-10-26 23:44:08,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:44:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 20956 states and 24679 transitions. [2020-10-26 23:44:08,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2020-10-26 23:44:08,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:44:08,452 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 23:44:08,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 23:44:08,452 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:44:08,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:44:08,453 INFO L82 PathProgramCache]: Analyzing trace with hash -440313291, now seen corresponding path program 1 times [2020-10-26 23:44:08,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:44:08,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069731377] [2020-10-26 23:44:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:44:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:44:08,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:08,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:09,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:44:09,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking...