/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:44:47,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:44:47,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:44:47,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:44:47,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:44:47,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:44:47,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:44:47,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:44:47,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:44:47,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:44:47,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:44:47,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:44:47,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:44:47,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:44:47,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:44:47,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:44:47,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:44:47,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:44:47,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:44:47,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:44:47,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:44:47,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:44:47,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:44:47,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:44:47,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:44:47,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:44:47,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:44:47,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:44:47,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:44:47,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:44:47,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:44:47,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:44:47,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:44:47,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:44:47,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:44:47,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:44:47,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:44:47,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:44:47,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:44:47,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:44:47,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:44:47,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:44:47,523 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:44:47,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:44:47,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:44:47,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:44:47,528 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:44:47,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:44:47,529 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:44:47,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:44:47,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:44:47,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:44:47,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:44:47,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:44:47,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:44:47,531 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:44:47,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:44:47,532 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:44:47,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:44:47,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:44:47,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:44:47,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:44:47,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:44:47,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:44:47,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:44:47,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:44:47,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:44:47,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:44:47,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:44:47,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:44:47,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:44:47,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:44:47,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:44:48,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:44:48,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:44:48,029 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:44:48,030 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:44:48,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label17.c [2020-10-26 20:44:48,117 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a96416bd/e7df0b45ecf34cab9c2a290d754b3852/FLAGaff941195 [2020-10-26 20:44:49,042 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:44:49,043 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label17.c [2020-10-26 20:44:49,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a96416bd/e7df0b45ecf34cab9c2a290d754b3852/FLAGaff941195 [2020-10-26 20:44:49,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a96416bd/e7df0b45ecf34cab9c2a290d754b3852 [2020-10-26 20:44:49,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:44:49,148 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:44:49,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:44:49,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:44:49,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:44:49,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:44:49" (1/1) ... [2020-10-26 20:44:49,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e78a79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:49, skipping insertion in model container [2020-10-26 20:44:49,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:44:49" (1/1) ... [2020-10-26 20:44:49,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:44:49,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:44:49,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:44:49,990 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:44:50,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:44:50,406 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:44:50,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:50 WrapperNode [2020-10-26 20:44:50,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:44:50,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:44:50,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:44:50,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:44:50,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:50" (1/1) ... [2020-10-26 20:44:50,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:50" (1/1) ... [2020-10-26 20:44:50,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:50" (1/1) ... [2020-10-26 20:44:50,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:50" (1/1) ... [2020-10-26 20:44:50,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:50" (1/1) ... [2020-10-26 20:44:50,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:50" (1/1) ... [2020-10-26 20:44:50,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:50" (1/1) ... [2020-10-26 20:44:50,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:44:50,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:44:50,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:44:50,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:44:50,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:44:50,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:44:50,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:44:50,718 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:44:50,718 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:44:50,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:44:50,718 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:44:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:44:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:44:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:44:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:44:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:44:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:44:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:44:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:44:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:44:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:44:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:44:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:44:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:44:53,626 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:44:53,627 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:44:53,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:44:53 BoogieIcfgContainer [2020-10-26 20:44:53,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:44:53,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:44:53,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:44:53,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:44:53,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:44:49" (1/3) ... [2020-10-26 20:44:53,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b1478e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:44:53, skipping insertion in model container [2020-10-26 20:44:53,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:44:50" (2/3) ... [2020-10-26 20:44:53,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b1478e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:44:53, skipping insertion in model container [2020-10-26 20:44:53,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:44:53" (3/3) ... [2020-10-26 20:44:53,639 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label17.c [2020-10-26 20:44:53,653 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:44:53,658 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:44:53,673 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:44:53,724 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:44:53,724 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:44:53,724 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:44:53,724 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:44:53,724 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:44:53,725 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:44:53,725 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:44:53,725 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:44:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:44:53,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-26 20:44:53,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:53,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:53,773 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:53,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1322723592, now seen corresponding path program 1 times [2020-10-26 20:44:53,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:53,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609526235] [2020-10-26 20:44:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:54,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:54,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:59,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:59,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-26 20:44:59,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:59,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 20:44:59,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:44:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-26 20:44:59,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 20:45:00,039 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:00,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:00,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:00,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:00,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:00,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:00,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 20:45:00,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:00,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:00,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:00,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:00,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:45:00,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609526235] [2020-10-26 20:45:00,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:45:00,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 20:45:00,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921258596] [2020-10-26 20:45:00,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 20:45:00,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:00,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 20:45:00,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 20:45:00,263 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-26 20:45:00,779 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:04,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:04,587 INFO L93 Difference]: Finished difference Result 894 states and 1553 transitions. [2020-10-26 20:45:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:45:04,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 206 [2020-10-26 20:45:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:04,609 INFO L225 Difference]: With dead ends: 894 [2020-10-26 20:45:04,609 INFO L226 Difference]: Without dead ends: 486 [2020-10-26 20:45:04,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:45:04,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-10-26 20:45:04,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 476. [2020-10-26 20:45:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-26 20:45:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 732 transitions. [2020-10-26 20:45:04,724 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 732 transitions. Word has length 206 [2020-10-26 20:45:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:04,729 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 732 transitions. [2020-10-26 20:45:04,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 20:45:04,730 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 732 transitions. [2020-10-26 20:45:04,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-26 20:45:04,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:04,744 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:04,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:45:04,748 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1049679577, now seen corresponding path program 1 times [2020-10-26 20:45:04,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:04,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192896566] [2020-10-26 20:45:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:04,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:05,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:07,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:08,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:08,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-26 20:45:08,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:08,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3785 [2020-10-26 20:45:08,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:08,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:45:08,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:08,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:45:08,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:08,933 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:08,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:08,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:08,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:08,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:08,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:08,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 20:45:08,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:08,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:08,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:08,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:08,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:45:09,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:09,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:09,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:09,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 20:45:09,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:09,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-26 20:45:09,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:09,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:09,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:09,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:45:09,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:45:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:45:09,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192896566] [2020-10-26 20:45:09,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:45:09,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:45:09,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520404027] [2020-10-26 20:45:09,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:09,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:09,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:09,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:09,258 INFO L87 Difference]: Start difference. First operand 476 states and 732 transitions. Second operand 7 states. [2020-10-26 20:45:09,518 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:12,360 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:45:13,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:13,298 INFO L93 Difference]: Finished difference Result 1401 states and 2188 transitions. [2020-10-26 20:45:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:45:13,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 218 [2020-10-26 20:45:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:13,311 INFO L225 Difference]: With dead ends: 1401 [2020-10-26 20:45:13,311 INFO L226 Difference]: Without dead ends: 931 [2020-10-26 20:45:13,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:45:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-10-26 20:45:13,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 905. [2020-10-26 20:45:13,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2020-10-26 20:45:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1381 transitions. [2020-10-26 20:45:13,391 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1381 transitions. Word has length 218 [2020-10-26 20:45:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:13,392 INFO L481 AbstractCegarLoop]: Abstraction has 905 states and 1381 transitions. [2020-10-26 20:45:13,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:45:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1381 transitions. [2020-10-26 20:45:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-26 20:45:13,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:13,399 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 20:45:13,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:45:13,399 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:13,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:13,401 INFO L82 PathProgramCache]: Analyzing trace with hash 106838121, now seen corresponding path program 1 times [2020-10-26 20:45:13,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:13,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929817215] [2020-10-26 20:45:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:13,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:14,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:14,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:16,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:16,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-26 20:45:16,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:16,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3077 [2020-10-26 20:45:16,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:16,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:45:16,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:16,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 226 [2020-10-26 20:45:16,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:16,940 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:16,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:16,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:16,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:16,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:16,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:16,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:45:16,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:16,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:16,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:16,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:16,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:17,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:17,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:17,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:17,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:45:17,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:17,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 20:45:17,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:17,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:17,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:17,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:45:17,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:45:17,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929817215] [2020-10-26 20:45:17,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:17,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:45:17,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877821282] [2020-10-26 20:45:17,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:45:17,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:17,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:45:17,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:45:17,444 INFO L87 Difference]: Start difference. First operand 905 states and 1381 transitions. Second operand 6 states. [2020-10-26 20:45:17,731 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:45:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:21,037 INFO L93 Difference]: Finished difference Result 2669 states and 4148 transitions. [2020-10-26 20:45:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:45:21,038 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 223 [2020-10-26 20:45:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:21,061 INFO L225 Difference]: With dead ends: 2669 [2020-10-26 20:45:21,061 INFO L226 Difference]: Without dead ends: 1770 [2020-10-26 20:45:21,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2020-10-26 20:45:21,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1758. [2020-10-26 20:45:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1758 states. [2020-10-26 20:45:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 2385 transitions. [2020-10-26 20:45:21,163 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 2385 transitions. Word has length 223 [2020-10-26 20:45:21,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:21,165 INFO L481 AbstractCegarLoop]: Abstraction has 1758 states and 2385 transitions. [2020-10-26 20:45:21,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:45:21,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 2385 transitions. [2020-10-26 20:45:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-26 20:45:21,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:21,181 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:21,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:45:21,182 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:21,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:21,182 INFO L82 PathProgramCache]: Analyzing trace with hash 102217408, now seen corresponding path program 1 times [2020-10-26 20:45:21,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:21,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047279667] [2020-10-26 20:45:21,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:21,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:21,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:22,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:24,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:26,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:26,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-26 20:45:26,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:45:26,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4971 [2020-10-26 20:45:26,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:26,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:45:26,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:26,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:45:26,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:26,519 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:26,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:26,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:26,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:26,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:26,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:26,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:45:26,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:26,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:26,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:26,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:26,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:26,674 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:45:26,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:26,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:26,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:26,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:45:26,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:26,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-26 20:45:26,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:26,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:26,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:26,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:45:26,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:45:26,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:45:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:26,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:26,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:26,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:45:26,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:26,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-26 20:45:26,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:26,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:26,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:26,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:45:26,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:45:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:45:27,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047279667] [2020-10-26 20:45:27,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:27,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:45:27,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453341015] [2020-10-26 20:45:27,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:45:27,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:27,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:45:27,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:45:27,121 INFO L87 Difference]: Start difference. First operand 1758 states and 2385 transitions. Second operand 8 states. [2020-10-26 20:45:27,408 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:31,245 INFO L93 Difference]: Finished difference Result 5267 states and 7230 transitions. [2020-10-26 20:45:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:45:31,245 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 236 [2020-10-26 20:45:31,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:31,275 INFO L225 Difference]: With dead ends: 5267 [2020-10-26 20:45:31,275 INFO L226 Difference]: Without dead ends: 3515 [2020-10-26 20:45:31,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:45:31,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2020-10-26 20:45:31,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 3500. [2020-10-26 20:45:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3500 states. [2020-10-26 20:45:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3500 states to 3500 states and 4810 transitions. [2020-10-26 20:45:31,440 INFO L78 Accepts]: Start accepts. Automaton has 3500 states and 4810 transitions. Word has length 236 [2020-10-26 20:45:31,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:31,440 INFO L481 AbstractCegarLoop]: Abstraction has 3500 states and 4810 transitions. [2020-10-26 20:45:31,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:45:31,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3500 states and 4810 transitions. [2020-10-26 20:45:31,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-26 20:45:31,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:31,454 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:31,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:45:31,454 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:31,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:31,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1826133180, now seen corresponding path program 1 times [2020-10-26 20:45:31,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:31,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463665870] [2020-10-26 20:45:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:31,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:32,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:32,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:34,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:34,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:34,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-26 20:45:34,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:45:34,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3261 [2020-10-26 20:45:34,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:45:34,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:45:34,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-26 20:45:34,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:35,171 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:35,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:35,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:35,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:35,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:35,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:35,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:45:35,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:35,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:45:35,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:35,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:45:35,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:35,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:35,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:35,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:35,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:45:35,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:35,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 20:45:35,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:35,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:35,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:35,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:45:35,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:35,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:45:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:35,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:35,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:35,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:35,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:45:35,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:35,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-26 20:45:35,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:35,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:35,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:35,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:45:35,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:45:35,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463665870] [2020-10-26 20:45:35,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:35,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:45:35,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17677715] [2020-10-26 20:45:35,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:45:35,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:35,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:45:35,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:45:35,571 INFO L87 Difference]: Start difference. First operand 3500 states and 4810 transitions. Second operand 6 states. [2020-10-26 20:45:35,990 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:45:39,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:39,211 INFO L93 Difference]: Finished difference Result 8819 states and 13140 transitions. [2020-10-26 20:45:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:45:39,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 238 [2020-10-26 20:45:39,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:39,253 INFO L225 Difference]: With dead ends: 8819 [2020-10-26 20:45:39,253 INFO L226 Difference]: Without dead ends: 5325 [2020-10-26 20:45:39,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5325 states. [2020-10-26 20:45:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5325 to 5243. [2020-10-26 20:45:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5243 states. [2020-10-26 20:45:39,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 7325 transitions. [2020-10-26 20:45:39,496 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 7325 transitions. Word has length 238 [2020-10-26 20:45:39,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:39,496 INFO L481 AbstractCegarLoop]: Abstraction has 5243 states and 7325 transitions. [2020-10-26 20:45:39,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:45:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 7325 transitions. [2020-10-26 20:45:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-26 20:45:39,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:39,518 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:39,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:45:39,518 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:39,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:39,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1711331647, now seen corresponding path program 1 times [2020-10-26 20:45:39,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:39,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733195266] [2020-10-26 20:45:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:39,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:39,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:39,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:43,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:44,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:44,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-26 20:45:44,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:45:44,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-26 20:45:44,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:44,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:45:44,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:44,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 20:45:44,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:44,904 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:44,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:44,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:44,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:44,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:44,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:44,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:45:44,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:44,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:44,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:44,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:44,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:45,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:45,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:45,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:45,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:45,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:45:45,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:45:45,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-26 20:45:45,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:45,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:45,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:45,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:45:45,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:45,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:45:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:45,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:45,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:45,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 20:45:45,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:45,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 20:45:45,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:45,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:45,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:45,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 20:45:45,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:45,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:45:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:45,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:45,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:45,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:45:45,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:45,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:45:45,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:45,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:45:45,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:45:45,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:45:45,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 42 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:45:45,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733195266] [2020-10-26 20:45:45,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:45,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:45:45,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540766119] [2020-10-26 20:45:45,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:45:45,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:45,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:45:45,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:45:45,348 INFO L87 Difference]: Start difference. First operand 5243 states and 7325 transitions. Second operand 8 states. [2020-10-26 20:45:45,635 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:45:46,801 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:45:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:49,635 INFO L93 Difference]: Finished difference Result 13202 states and 19050 transitions. [2020-10-26 20:45:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:45:49,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 252 [2020-10-26 20:45:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:49,685 INFO L225 Difference]: With dead ends: 13202 [2020-10-26 20:45:49,686 INFO L226 Difference]: Without dead ends: 7965 [2020-10-26 20:45:49,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:45:49,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2020-10-26 20:45:49,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7901. [2020-10-26 20:45:49,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7901 states. [2020-10-26 20:45:49,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7901 states to 7901 states and 11004 transitions. [2020-10-26 20:45:49,987 INFO L78 Accepts]: Start accepts. Automaton has 7901 states and 11004 transitions. Word has length 252 [2020-10-26 20:45:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:49,987 INFO L481 AbstractCegarLoop]: Abstraction has 7901 states and 11004 transitions. [2020-10-26 20:45:49,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:45:49,988 INFO L276 IsEmpty]: Start isEmpty. Operand 7901 states and 11004 transitions. [2020-10-26 20:45:50,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-26 20:45:50,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:50,018 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:45:50,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:45:50,018 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:50,019 INFO L82 PathProgramCache]: Analyzing trace with hash 977179845, now seen corresponding path program 1 times [2020-10-26 20:45:50,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:50,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841574862] [2020-10-26 20:45:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:50,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:50,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:50,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:51,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:53,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:54,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:55,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:55,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-26 20:45:55,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:45:55,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 20:45:55,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:55,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:45:55,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:55,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 20:45:55,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:55,370 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:55,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:55,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:55,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:55,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:55,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:55,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:45:55,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:55,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:55,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:55,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:55,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:45:55,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:55,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:45:55,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:55,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:55,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:55,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:45:55,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:55,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:45:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:55,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:55,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:55,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 20:45:55,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:55,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-26 20:45:55,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:55,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:55,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 20:45:55,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:55,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-26 20:45:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:55,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:55,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:55,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:45:55,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:55,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:45:55,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:55,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:45:55,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:45:55,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:45:55,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:45:55,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841574862] [2020-10-26 20:45:55,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:55,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:45:55,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22113037] [2020-10-26 20:45:55,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:45:55,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:55,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:45:55,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:45:55,958 INFO L87 Difference]: Start difference. First operand 7901 states and 11004 transitions. Second operand 8 states. [2020-10-26 20:45:56,266 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:45:59,005 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:46:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:00,736 INFO L93 Difference]: Finished difference Result 23437 states and 33204 transitions. [2020-10-26 20:46:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 20:46:00,737 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 254 [2020-10-26 20:46:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:00,813 INFO L225 Difference]: With dead ends: 23437 [2020-10-26 20:46:00,814 INFO L226 Difference]: Without dead ends: 15542 [2020-10-26 20:46:00,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:46:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15542 states. [2020-10-26 20:46:01,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15542 to 15501. [2020-10-26 20:46:01,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15501 states. [2020-10-26 20:46:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15501 states to 15501 states and 21588 transitions. [2020-10-26 20:46:01,408 INFO L78 Accepts]: Start accepts. Automaton has 15501 states and 21588 transitions. Word has length 254 [2020-10-26 20:46:01,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:01,409 INFO L481 AbstractCegarLoop]: Abstraction has 15501 states and 21588 transitions. [2020-10-26 20:46:01,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:46:01,409 INFO L276 IsEmpty]: Start isEmpty. Operand 15501 states and 21588 transitions. [2020-10-26 20:46:01,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-26 20:46:01,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:01,435 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:46:01,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:46:01,436 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1525941237, now seen corresponding path program 1 times [2020-10-26 20:46:01,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:01,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219991674] [2020-10-26 20:46:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:01,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:02,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:02,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:02,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-26 20:46:02,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:46:02,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1435 [2020-10-26 20:46:02,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:02,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:02,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:46:02,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:46:02,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:03,186 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:03,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:03,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:03,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:03,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:03,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:03,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:46:03,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:03,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:03,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:03,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:03,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:03,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:03,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:03,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:03,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:03,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:03,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 20:46:03,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:03,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:46:03,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:03,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:03,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:03,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:03,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 20:46:03,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:03,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-26 20:46:03,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:03,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:03,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:03,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 20:46:03,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:46:03,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219991674] [2020-10-26 20:46:03,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:03,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:46:03,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28481382] [2020-10-26 20:46:03,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:03,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:03,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:03,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:03,655 INFO L87 Difference]: Start difference. First operand 15501 states and 21588 transitions. Second operand 7 states. [2020-10-26 20:46:04,116 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:05,182 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:10,333 INFO L93 Difference]: Finished difference Result 52286 states and 83424 transitions. [2020-10-26 20:46:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:46:10,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 257 [2020-10-26 20:46:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:10,552 INFO L225 Difference]: With dead ends: 52286 [2020-10-26 20:46:10,552 INFO L226 Difference]: Without dead ends: 36791 [2020-10-26 20:46:10,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:46:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36791 states. [2020-10-26 20:46:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36791 to 36619. [2020-10-26 20:46:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36619 states. [2020-10-26 20:46:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36619 states to 36619 states and 54611 transitions. [2020-10-26 20:46:12,400 INFO L78 Accepts]: Start accepts. Automaton has 36619 states and 54611 transitions. Word has length 257 [2020-10-26 20:46:12,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:12,401 INFO L481 AbstractCegarLoop]: Abstraction has 36619 states and 54611 transitions. [2020-10-26 20:46:12,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:46:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 36619 states and 54611 transitions. [2020-10-26 20:46:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-10-26 20:46:12,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:12,446 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-26 20:46:12,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:46:12,446 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:12,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1026262436, now seen corresponding path program 1 times [2020-10-26 20:46:12,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:12,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324938455] [2020-10-26 20:46:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:12,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:12,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:15,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:17,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:17,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:17,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 302 [2020-10-26 20:46:17,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:46:17,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 20:46:17,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:17,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 20:46:17,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:17,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 293 [2020-10-26 20:46:17,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:17,834 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:17,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:17,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:17,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:17,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:17,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:17,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:46:17,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:17,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:17,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:17,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:17,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:17,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:17,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:18,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:18,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:46:18,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:18,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:46:18,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:18,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:18,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:18,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:46:18,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:18,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:46:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:18,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:18,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:18,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:46:18,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:18,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-26 20:46:18,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:18,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:46:18,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:18,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:46:18,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:18,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-26 20:46:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:18,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:18,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:18,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 20:46:18,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:18,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 20:46:18,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:18,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:18,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:18,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 20:46:18,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:46:18,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324938455] [2020-10-26 20:46:18,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:18,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:46:18,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701216884] [2020-10-26 20:46:18,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:46:18,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:18,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:46:18,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:46:18,464 INFO L87 Difference]: Start difference. First operand 36619 states and 54611 transitions. Second operand 9 states. [2020-10-26 20:46:18,731 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:19,049 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:21,100 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:46:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:27,018 INFO L93 Difference]: Finished difference Result 116951 states and 189674 transitions. [2020-10-26 20:46:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 20:46:27,019 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 286 [2020-10-26 20:46:27,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:27,645 INFO L225 Difference]: With dead ends: 116951 [2020-10-26 20:46:27,645 INFO L226 Difference]: Without dead ends: 80362 [2020-10-26 20:46:27,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-10-26 20:46:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80362 states. [2020-10-26 20:46:31,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80362 to 78613. [2020-10-26 20:46:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78613 states. [2020-10-26 20:46:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78613 states to 78613 states and 118703 transitions. [2020-10-26 20:46:31,977 INFO L78 Accepts]: Start accepts. Automaton has 78613 states and 118703 transitions. Word has length 286 [2020-10-26 20:46:31,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:31,978 INFO L481 AbstractCegarLoop]: Abstraction has 78613 states and 118703 transitions. [2020-10-26 20:46:31,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:46:31,978 INFO L276 IsEmpty]: Start isEmpty. Operand 78613 states and 118703 transitions. [2020-10-26 20:46:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-26 20:46:32,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:32,038 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 20:46:32,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:46:32,038 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:32,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1300476691, now seen corresponding path program 1 times [2020-10-26 20:46:32,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:32,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303857901] [2020-10-26 20:46:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:32,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:32,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:34,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:36,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:36,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 300 [2020-10-26 20:46:36,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:46:36,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4008 [2020-10-26 20:46:36,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:36,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:46:36,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:46:36,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 20:46:36,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:36,390 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:36,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:36,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:36,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:36,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:36,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:36,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 20:46:36,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:36,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:36,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:36,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:46:36,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:36,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:36,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:36,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:36,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:46:36,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:36,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-26 20:46:36,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:36,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:36,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:36,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:46:36,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:46:37,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303857901] [2020-10-26 20:46:37,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:46:37,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 20:46:37,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52393708] [2020-10-26 20:46:37,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:37,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:37,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:37,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:37,135 INFO L87 Difference]: Start difference. First operand 78613 states and 118703 transitions. Second operand 7 states. [2020-10-26 20:46:37,432 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-26 20:46:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:46:43,713 INFO L93 Difference]: Finished difference Result 202713 states and 317193 transitions. [2020-10-26 20:46:43,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:46:43,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 288 [2020-10-26 20:46:43,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:46:44,847 INFO L225 Difference]: With dead ends: 202713 [2020-10-26 20:46:44,848 INFO L226 Difference]: Without dead ends: 124781 [2020-10-26 20:46:45,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:46:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124781 states. [2020-10-26 20:46:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124781 to 123890. [2020-10-26 20:46:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123890 states. [2020-10-26 20:46:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123890 states to 123890 states and 191591 transitions. [2020-10-26 20:46:49,901 INFO L78 Accepts]: Start accepts. Automaton has 123890 states and 191591 transitions. Word has length 288 [2020-10-26 20:46:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:46:49,902 INFO L481 AbstractCegarLoop]: Abstraction has 123890 states and 191591 transitions. [2020-10-26 20:46:49,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:46:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 123890 states and 191591 transitions. [2020-10-26 20:46:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-26 20:46:50,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:46:50,265 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 20:46:50,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:46:50,265 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:46:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:46:50,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1568012166, now seen corresponding path program 1 times [2020-10-26 20:46:50,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:46:50,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492389780] [2020-10-26 20:46:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:46:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:50,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:50,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:52,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:53,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:53,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-26 20:46:53,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:46:53,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3205 [2020-10-26 20:46:53,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:53,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:53,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:46:53,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:46:53,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:53,862 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:46:53,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:46:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:53,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:53,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:53,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:46:53,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:53,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:46:53,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:53,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:46:53,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:53,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:46:53,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:53,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:46:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:54,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:54,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:54,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:46:54,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:54,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:46:54,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:54,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:46:54,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:46:54,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:46:54,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:54,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:46:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:46:54,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:46:54,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:46:54,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:46:54,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:46:54,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-26 20:46:54,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:46:54,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:46:54,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:46:54,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:46:54,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:46:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:46:54,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492389780] [2020-10-26 20:46:54,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:46:54,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:46:54,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695258282] [2020-10-26 20:46:54,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:46:54,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:46:54,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:46:54,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:46:54,520 INFO L87 Difference]: Start difference. First operand 123890 states and 191591 transitions. Second operand 7 states. [2020-10-26 20:46:54,990 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:46:55,924 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:47:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:05,092 INFO L93 Difference]: Finished difference Result 276767 states and 485438 transitions. [2020-10-26 20:47:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:47:05,093 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 309 [2020-10-26 20:47:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:06,532 INFO L225 Difference]: With dead ends: 276767 [2020-10-26 20:47:06,532 INFO L226 Difference]: Without dead ends: 154141 [2020-10-26 20:47:07,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:47:07,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154141 states. [2020-10-26 20:47:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154141 to 149360. [2020-10-26 20:47:12,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149360 states. [2020-10-26 20:47:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149360 states to 149360 states and 226954 transitions. [2020-10-26 20:47:13,697 INFO L78 Accepts]: Start accepts. Automaton has 149360 states and 226954 transitions. Word has length 309 [2020-10-26 20:47:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:13,698 INFO L481 AbstractCegarLoop]: Abstraction has 149360 states and 226954 transitions. [2020-10-26 20:47:13,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 149360 states and 226954 transitions. [2020-10-26 20:47:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-26 20:47:13,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:13,765 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:13,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:47:13,765 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:13,767 INFO L82 PathProgramCache]: Analyzing trace with hash -434129315, now seen corresponding path program 1 times [2020-10-26 20:47:13,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:13,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141216451] [2020-10-26 20:47:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:13,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:14,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:14,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:18,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:18,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:18,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-26 20:47:18,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:47:18,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 20:47:18,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:18,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:47:18,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:47:18,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:47:18,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:19,114 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:19,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:19,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:19,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:19,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:19,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:19,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:47:19,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:19,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:19,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:47:19,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:19,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:19,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:19,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:19,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:47:19,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:19,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-26 20:47:19,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:19,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:19,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:19,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:47:19,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:19,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:47:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:19,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:19,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:19,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:47:19,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:19,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-26 20:47:19,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:19,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:19,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-26 20:47:19,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:19,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 108 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:47:19,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141216451] [2020-10-26 20:47:19,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:19,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:47:19,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65691842] [2020-10-26 20:47:19,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:47:19,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:19,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:47:19,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:47:19,647 INFO L87 Difference]: Start difference. First operand 149360 states and 226954 transitions. Second operand 7 states. [2020-10-26 20:47:19,932 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:47:21,024 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:47:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:27,545 INFO L93 Difference]: Finished difference Result 334336 states and 514787 transitions. [2020-10-26 20:47:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:47:27,545 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 320 [2020-10-26 20:47:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:28,699 INFO L225 Difference]: With dead ends: 334336 [2020-10-26 20:47:28,699 INFO L226 Difference]: Without dead ends: 186477 [2020-10-26 20:47:29,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:47:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186477 states. [2020-10-26 20:47:33,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186477 to 184659. [2020-10-26 20:47:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184659 states. [2020-10-26 20:47:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184659 states to 184659 states and 279054 transitions. [2020-10-26 20:47:35,176 INFO L78 Accepts]: Start accepts. Automaton has 184659 states and 279054 transitions. Word has length 320 [2020-10-26 20:47:35,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:35,178 INFO L481 AbstractCegarLoop]: Abstraction has 184659 states and 279054 transitions. [2020-10-26 20:47:35,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 184659 states and 279054 transitions. [2020-10-26 20:47:35,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-26 20:47:35,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:35,249 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:35,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:47:35,249 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:35,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:35,250 INFO L82 PathProgramCache]: Analyzing trace with hash -300054902, now seen corresponding path program 1 times [2020-10-26 20:47:35,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:35,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613687898] [2020-10-26 20:47:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:35,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:35,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:37,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:39,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:39,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-26 20:47:39,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:47:39,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3723 [2020-10-26 20:47:39,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:39,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:39,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-26 20:47:39,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 20:47:39,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:39,356 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:47:39,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:47:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:39,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:39,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:39,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:47:39,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:39,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:47:39,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:47:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:39,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:47:39,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:39,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:47:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:39,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:39,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:39,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:47:39,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:39,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 20:47:39,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:47:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:47:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 20:47:39,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:39,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-26 20:47:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:39,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:39,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:47:39,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 20:47:39,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:47:39,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-26 20:47:39,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:47:39,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:47:39,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:47:39,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-26 20:47:39,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:47:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:47:40,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613687898] [2020-10-26 20:47:40,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:47:40,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:47:40,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252089552] [2020-10-26 20:47:40,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:47:40,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:47:40,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:47:40,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:47:40,027 INFO L87 Difference]: Start difference. First operand 184659 states and 279054 transitions. Second operand 7 states. [2020-10-26 20:47:40,411 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:47:40,810 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:47:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:47:50,169 INFO L93 Difference]: Finished difference Result 348148 states and 534896 transitions. [2020-10-26 20:47:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:47:50,170 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 323 [2020-10-26 20:47:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:47:50,920 INFO L225 Difference]: With dead ends: 348148 [2020-10-26 20:47:50,920 INFO L226 Difference]: Without dead ends: 164978 [2020-10-26 20:47:51,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:47:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164978 states. [2020-10-26 20:47:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164978 to 160867. [2020-10-26 20:47:55,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160867 states. [2020-10-26 20:47:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160867 states to 160867 states and 214637 transitions. [2020-10-26 20:47:55,887 INFO L78 Accepts]: Start accepts. Automaton has 160867 states and 214637 transitions. Word has length 323 [2020-10-26 20:47:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:47:55,887 INFO L481 AbstractCegarLoop]: Abstraction has 160867 states and 214637 transitions. [2020-10-26 20:47:55,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:47:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 160867 states and 214637 transitions. [2020-10-26 20:47:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-26 20:47:55,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:47:55,938 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:47:55,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:47:55,938 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:47:55,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:47:55,939 INFO L82 PathProgramCache]: Analyzing trace with hash 920019534, now seen corresponding path program 1 times [2020-10-26 20:47:55,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:47:55,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026549586] [2020-10-26 20:47:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:47:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:47:56,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:47:56,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking...