/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/Problem04_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:01:41,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:01:41,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:01:41,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:01:41,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:01:41,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:01:41,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:01:41,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:01:41,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:01:41,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:01:41,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:01:41,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:01:41,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:01:41,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:01:41,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:01:41,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:01:41,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:01:41,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:01:41,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:01:41,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:01:41,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:01:41,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:01:41,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:01:41,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:01:41,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:01:41,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:01:41,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:01:41,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:01:41,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:01:41,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:01:41,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:01:41,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:01:41,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:01:41,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:01:41,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:01:41,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:01:41,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:01:41,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:01:41,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:01:41,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:01:41,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:01:41,549 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 21:01:41,577 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:01:41,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:01:41,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:01:41,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:01:41,579 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:01:41,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:01:41,580 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:01:41,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:01:41,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:01:41,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:01:41,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:01:41,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:01:41,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:01:41,581 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:01:41,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:01:41,582 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:01:41,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:01:41,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:01:41,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:01:41,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:01:41,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:01:41,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:01:41,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:01:41,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:01:41,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:01:41,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:01:41,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:01:41,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:01:41,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:01:41,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:01:42,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:01:42,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:01:42,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:01:42,077 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:01:42,078 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:01:42,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem04_label24.c [2020-10-26 21:01:42,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c897dc73/32f449c9e59e4911bc95eab88092622c/FLAGe7708a097 [2020-10-26 21:01:43,287 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:01:43,288 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem04_label24.c [2020-10-26 21:01:43,337 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c897dc73/32f449c9e59e4911bc95eab88092622c/FLAGe7708a097 [2020-10-26 21:01:43,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c897dc73/32f449c9e59e4911bc95eab88092622c [2020-10-26 21:01:43,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:01:43,680 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:01:43,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:01:43,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:01:43,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:01:43,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:01:43" (1/1) ... [2020-10-26 21:01:43,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45eeeb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:01:43, skipping insertion in model container [2020-10-26 21:01:43,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:01:43" (1/1) ... [2020-10-26 21:01:43,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:01:43,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:01:45,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:01:45,588 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:01:46,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:01:46,477 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:01:46,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:01:46 WrapperNode [2020-10-26 21:01:46,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:01:46,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:01:46,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:01:46,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:01:46,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:01:46" (1/1) ... [2020-10-26 21:01:46,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:01:46" (1/1) ... [2020-10-26 21:01:46,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:01:46" (1/1) ... [2020-10-26 21:01:46,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:01:46" (1/1) ... [2020-10-26 21:01:46,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:01:46" (1/1) ... [2020-10-26 21:01:46,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:01:46" (1/1) ... [2020-10-26 21:01:46,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:01:46" (1/1) ... [2020-10-26 21:01:46,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:01:46,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:01:46,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:01:46,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:01:46,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:01:46" (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 21:01:46,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:01:46,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:01:46,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:01:46,966 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:01:46,967 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:01:46,967 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:01:46,967 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:01:46,967 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:01:46,967 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:01:46,968 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:01:46,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:01:46,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:01:46,969 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:01:46,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:01:46,969 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:01:46,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:01:46,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:01:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:01:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:01:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:01:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:01:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:01:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:01:46,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:01:46,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:01:52,537 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:01:52,538 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:01:52,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:01:52 BoogieIcfgContainer [2020-10-26 21:01:52,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:01:52,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:01:52,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:01:52,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:01:52,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:01:43" (1/3) ... [2020-10-26 21:01:52,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0f23a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:01:52, skipping insertion in model container [2020-10-26 21:01:52,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:01:46" (2/3) ... [2020-10-26 21:01:52,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0f23a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:01:52, skipping insertion in model container [2020-10-26 21:01:52,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:01:52" (3/3) ... [2020-10-26 21:01:52,551 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label24.c [2020-10-26 21:01:52,568 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:01:52,576 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:01:52,589 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:01:52,628 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:01:52,628 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:01:52,628 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:01:52,628 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:01:52,629 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:01:52,629 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:01:52,629 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:01:52,629 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:01:52,666 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states. [2020-10-26 21:01:52,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2020-10-26 21:01:52,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:01:52,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:52,730 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:01:52,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:01:52,737 INFO L82 PathProgramCache]: Analyzing trace with hash 332662548, now seen corresponding path program 1 times [2020-10-26 21:01:52,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:01:52,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034249500] [2020-10-26 21:01:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:01:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:01:53,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:54,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:01:58,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:01:58,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 832 [2020-10-26 21:01:58,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:01:58,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-26 21:01:58,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:01:58,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:01:58,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:01:58,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 742 [2020-10-26 21:01:58,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 21:02:01,955 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-26 21:02:02,180 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2020-10-26 21:02:02,516 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 53 [2020-10-26 21:02:02,907 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 55 [2020-10-26 21:02:03,270 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 51 [2020-10-26 21:02:03,612 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 47 [2020-10-26 21:02:03,859 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 36 [2020-10-26 21:02:04,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:02:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:04,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:04,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:04,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:02:04,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:04,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 21:02:04,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:04,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:02:04,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:02:04,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:02:04,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:10,055 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 21:02:10,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034249500] [2020-10-26 21:02:10,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:02:10,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:02:10,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908859445] [2020-10-26 21:02:10,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:02:10,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:02:10,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:02:10,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:02:10,084 INFO L87 Difference]: Start difference. First operand 910 states. Second operand 18 states. [2020-10-26 21:02:10,392 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-26 21:02:10,676 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-26 21:02:10,953 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-26 21:02:11,284 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-26 21:02:12,083 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 150 [2020-10-26 21:02:12,772 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 147 [2020-10-26 21:02:16,199 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 144 [2020-10-26 21:02:16,836 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 139 [2020-10-26 21:02:19,670 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-26 21:02:20,072 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2020-10-26 21:02:21,753 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 113 [2020-10-26 21:02:26,480 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-26 21:02:26,675 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-26 21:02:33,271 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-26 21:02:33,489 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-26 21:02:37,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:02:37,186 INFO L93 Difference]: Finished difference Result 2553 states and 4911 transitions. [2020-10-26 21:02:37,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:02:37,189 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 816 [2020-10-26 21:02:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:02:37,231 INFO L225 Difference]: With dead ends: 2553 [2020-10-26 21:02:37,231 INFO L226 Difference]: Without dead ends: 1581 [2020-10-26 21:02:37,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:02:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2020-10-26 21:02:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1581. [2020-10-26 21:02:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1581 states. [2020-10-26 21:02:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2340 transitions. [2020-10-26 21:02:37,423 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2340 transitions. Word has length 816 [2020-10-26 21:02:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:02:37,426 INFO L481 AbstractCegarLoop]: Abstraction has 1581 states and 2340 transitions. [2020-10-26 21:02:37,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:02:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2340 transitions. [2020-10-26 21:02:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2020-10-26 21:02:37,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:02:37,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:37,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:02:37,472 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:02:37,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:02:37,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1855615547, now seen corresponding path program 1 times [2020-10-26 21:02:37,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:02:37,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071886553] [2020-10-26 21:02:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:02:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:37,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:38,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:42,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:42,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:42,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 853 [2020-10-26 21:02:42,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:02:42,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5130 [2020-10-26 21:02:42,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:42,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 21:02:42,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:02:42,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 844 [2020-10-26 21:02:42,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:43,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:02:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:43,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:43,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:43,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:02:43,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:02:43,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 21:02:43,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:43,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:02:43,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:02:43,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:02:43,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:43,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:02:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:43,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:43,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:43,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:02:43,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:02:43,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:02:43,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 21:02:43,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:02:43,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:02:43,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:02:43,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 21:02:43,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:02:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 21:02:44,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071886553] [2020-10-26 21:02:44,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:02:44,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 21:02:44,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831293127] [2020-10-26 21:02:44,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 21:02:44,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:02:44,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 21:02:44,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 21:02:44,556 INFO L87 Difference]: Start difference. First operand 1581 states and 2340 transitions. Second operand 6 states. [2020-10-26 21:02:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:02:56,153 INFO L93 Difference]: Finished difference Result 3285 states and 5564 transitions. [2020-10-26 21:02:56,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 21:02:56,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 835 [2020-10-26 21:02:56,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:02:56,170 INFO L225 Difference]: With dead ends: 3285 [2020-10-26 21:02:56,171 INFO L226 Difference]: Without dead ends: 2437 [2020-10-26 21:02:56,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:02:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2020-10-26 21:02:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 2426. [2020-10-26 21:02:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2426 states. [2020-10-26 21:02:56,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 3490 transitions. [2020-10-26 21:02:56,254 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 3490 transitions. Word has length 835 [2020-10-26 21:02:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:02:56,256 INFO L481 AbstractCegarLoop]: Abstraction has 2426 states and 3490 transitions. [2020-10-26 21:02:56,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 21:02:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 3490 transitions. [2020-10-26 21:02:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2020-10-26 21:02:56,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:02:56,270 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:56,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:02:56,271 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:02:56,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:02:56,272 INFO L82 PathProgramCache]: Analyzing trace with hash 715826108, now seen corresponding path program 1 times [2020-10-26 21:02:56,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:02:56,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862078189] [2020-10-26 21:02:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:02:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:02:56,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:56,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:02:59,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:01,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:01,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 870 [2020-10-26 21:03:01,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:03:01,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 21:03:01,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:01,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:03:01,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:03:01,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 21:03:01,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:01,706 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:03:01,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:03:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:01,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:01,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:01,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:03:01,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:03:01,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 21:03:01,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:01,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:03:01,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:03:01,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:03:01,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:01,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:03:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:01,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:01,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:01,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:01,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:03:01,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:03:01,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-26 21:03:01,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:01,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:03:01,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:03:01,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 21:03:01,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:01,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 21:03:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:01,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:01,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:01,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 21:03:01,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:03:01,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 21:03:01,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:03:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:03:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 21:03:01,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 21:03:02,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862078189] [2020-10-26 21:03:02,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:03:02,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:03:02,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483987527] [2020-10-26 21:03:02,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:03:02,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:03:02,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:03:02,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:03:02,797 INFO L87 Difference]: Start difference. First operand 2426 states and 3490 transitions. Second operand 8 states. [2020-10-26 21:03:05,683 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-26 21:03:17,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:03:17,401 INFO L93 Difference]: Finished difference Result 5896 states and 9142 transitions. [2020-10-26 21:03:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 21:03:17,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 850 [2020-10-26 21:03:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:03:17,425 INFO L225 Difference]: With dead ends: 5896 [2020-10-26 21:03:17,426 INFO L226 Difference]: Without dead ends: 4203 [2020-10-26 21:03:17,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:03:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2020-10-26 21:03:17,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 4165. [2020-10-26 21:03:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4165 states. [2020-10-26 21:03:17,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4165 states to 4165 states and 5688 transitions. [2020-10-26 21:03:17,604 INFO L78 Accepts]: Start accepts. Automaton has 4165 states and 5688 transitions. Word has length 850 [2020-10-26 21:03:17,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:03:17,604 INFO L481 AbstractCegarLoop]: Abstraction has 4165 states and 5688 transitions. [2020-10-26 21:03:17,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:03:17,605 INFO L276 IsEmpty]: Start isEmpty. Operand 4165 states and 5688 transitions. [2020-10-26 21:03:17,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 901 [2020-10-26 21:03:17,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:03:17,625 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:17,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:03:17,626 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:03:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:03:17,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1614506062, now seen corresponding path program 1 times [2020-10-26 21:03:17,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:03:17,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444324014] [2020-10-26 21:03:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:03:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:17,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:17,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:18,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:22,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:22,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 922 [2020-10-26 21:03:22,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:03:22,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 21:03:22,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:03:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:03:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 21:03:22,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:22,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:03:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:23,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:23,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:23,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:03:23,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:03:23,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 21:03:23,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:23,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:03:23,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:03:23,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:03:23,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:23,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:03:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:23,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:23,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:23,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:23,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:03:23,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:03:23,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 21:03:23,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:23,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:03:23,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:03:23,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 21:03:23,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:23,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 21:03:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:23,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:23,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:23,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 21:03:23,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:03:23,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-26 21:03:23,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:23,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:03:23,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:03:23,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 21:03:23,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:23,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 21:03:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:23,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:23,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:23,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 21:03:23,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:03:23,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 21:03:23,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:23,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:03:23,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 21:03:23,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:03:23,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 80 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 21:03:23,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444324014] [2020-10-26 21:03:23,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:03:23,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:03:23,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491783697] [2020-10-26 21:03:23,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:03:23,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:03:23,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:03:23,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:03:23,987 INFO L87 Difference]: Start difference. First operand 4165 states and 5688 transitions. Second operand 7 states. [2020-10-26 21:03:24,129 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:03:32,854 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:03:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:03:39,289 INFO L93 Difference]: Finished difference Result 11222 states and 16040 transitions. [2020-10-26 21:03:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:03:39,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 900 [2020-10-26 21:03:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:03:39,342 INFO L225 Difference]: With dead ends: 11222 [2020-10-26 21:03:39,342 INFO L226 Difference]: Without dead ends: 7790 [2020-10-26 21:03:39,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:03:39,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2020-10-26 21:03:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 7689. [2020-10-26 21:03:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7689 states. [2020-10-26 21:03:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 9961 transitions. [2020-10-26 21:03:39,649 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 9961 transitions. Word has length 900 [2020-10-26 21:03:39,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:03:39,649 INFO L481 AbstractCegarLoop]: Abstraction has 7689 states and 9961 transitions. [2020-10-26 21:03:39,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:03:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 9961 transitions. [2020-10-26 21:03:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2020-10-26 21:03:39,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:03:39,686 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:03:39,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:03:39,686 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:03:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:03:39,687 INFO L82 PathProgramCache]: Analyzing trace with hash -508582484, now seen corresponding path program 1 times [2020-10-26 21:03:39,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:03:39,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821090176] [2020-10-26 21:03:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:03:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:39,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:39,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:40,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:41,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:44,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:44,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 932 [2020-10-26 21:03:44,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 21:03:44,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-26 21:03:44,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:03:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:03:44,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 21:03:44,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:45,120 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:03:45,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:03:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:45,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:45,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:45,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:03:45,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:03:45,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 21:03:45,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:45,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:03:45,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:03:45,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:03:45,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:45,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:03:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:45,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:45,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:45,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:45,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:03:45,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:03:45,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 21:03:45,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:45,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:03:45,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:03:45,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 21:03:45,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:45,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 21:03:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:45,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:45,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:45,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 21:03:45,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:03:45,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 21:03:45,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:45,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:03:45,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:03:45,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 21:03:45,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:45,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-26 21:03:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:45,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:45,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:45,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 21:03:45,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:03:45,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-26 21:03:45,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:45,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:03:45,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-26 21:03:45,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:03:45,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:45,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-26 21:03:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:03:45,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:03:45,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:03:45,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 21:03:45,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:03:45,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 21:03:45,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:03:45,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:03:45,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 21:03:45,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:03:45,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:03:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 89 proven. 33 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-26 21:03:46,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821090176] [2020-10-26 21:03:46,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:03:46,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 21:03:46,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558065721] [2020-10-26 21:03:46,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:03:46,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:03:46,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:03:46,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:03:46,130 INFO L87 Difference]: Start difference. First operand 7689 states and 9961 transitions. Second operand 8 states. [2020-10-26 21:03:46,283 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-26 21:03:54,298 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-26 21:04:00,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:04:00,777 INFO L93 Difference]: Finished difference Result 18441 states and 24787 transitions. [2020-10-26 21:04:00,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 21:04:00,778 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 908 [2020-10-26 21:04:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:04:00,834 INFO L225 Difference]: With dead ends: 18441 [2020-10-26 21:04:00,834 INFO L226 Difference]: Without dead ends: 11485 [2020-10-26 21:04:00,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-26 21:04:00,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11485 states. [2020-10-26 21:04:01,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11485 to 11197. [2020-10-26 21:04:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11197 states. [2020-10-26 21:04:01,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11197 states to 11197 states and 14203 transitions. [2020-10-26 21:04:01,167 INFO L78 Accepts]: Start accepts. Automaton has 11197 states and 14203 transitions. Word has length 908 [2020-10-26 21:04:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:04:01,167 INFO L481 AbstractCegarLoop]: Abstraction has 11197 states and 14203 transitions. [2020-10-26 21:04:01,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:04:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 11197 states and 14203 transitions. [2020-10-26 21:04:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2020-10-26 21:04:01,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:04:01,204 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:01,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 21:04:01,204 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:04:01,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:04:01,205 INFO L82 PathProgramCache]: Analyzing trace with hash 303118687, now seen corresponding path program 1 times [2020-10-26 21:04:01,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:04:01,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719482103] [2020-10-26 21:04:01,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:04:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:01,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:01,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:01,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:02,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:06,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:06,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 939 [2020-10-26 21:04:06,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 21:04:06,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-26 21:04:06,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:06,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:04:06,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:04:06,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 21:04:06,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:06,711 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:04:06,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:04:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:06,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:06,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:06,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:04:06,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:06,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 21:04:06,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:06,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:04:06,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:04:06,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:04:06,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:06,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:04:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:06,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:06,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:06,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:06,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 21:04:06,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:04:06,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-26 21:04:06,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:06,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:04:06,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:04:06,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 21:04:06,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:06,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-26 21:04:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:06,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:06,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:06,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 21:04:06,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:06,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 21:04:06,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:06,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:04:06,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:04:06,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 21:04:06,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 21:04:06,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-26 21:04:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:06,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:06,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:06,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 21:04:06,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:06,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-26 21:04:06,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:06,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:04:06,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-26 21:04:06,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:04:06,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 21:04:06,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-10-26 21:04:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:06,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:06,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:06,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 21:04:06,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:06,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 21:04:06,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:06,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:04:06,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 21:04:06,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:04:06,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 96 proven. 39 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-26 21:04:07,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719482103] [2020-10-26 21:04:07,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:04:07,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:04:07,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73765691] [2020-10-26 21:04:07,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:04:07,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:04:07,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:04:07,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:04:07,480 INFO L87 Difference]: Start difference. First operand 11197 states and 14203 transitions. Second operand 7 states. [2020-10-26 21:04:07,614 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-26 21:04:10,016 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-26 21:04:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:04:19,016 INFO L93 Difference]: Finished difference Result 21815 states and 27925 transitions. [2020-10-26 21:04:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 21:04:19,018 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 915 [2020-10-26 21:04:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:04:19,054 INFO L225 Difference]: With dead ends: 21815 [2020-10-26 21:04:19,054 INFO L226 Difference]: Without dead ends: 11351 [2020-10-26 21:04:19,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:04:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11351 states. [2020-10-26 21:04:19,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11351 to 11258. [2020-10-26 21:04:19,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11258 states. [2020-10-26 21:04:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11258 states to 11258 states and 14313 transitions. [2020-10-26 21:04:19,404 INFO L78 Accepts]: Start accepts. Automaton has 11258 states and 14313 transitions. Word has length 915 [2020-10-26 21:04:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:04:19,405 INFO L481 AbstractCegarLoop]: Abstraction has 11258 states and 14313 transitions. [2020-10-26 21:04:19,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:04:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 11258 states and 14313 transitions. [2020-10-26 21:04:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2020-10-26 21:04:19,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:04:19,445 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:19,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 21:04:19,445 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:04:19,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:04:19,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1927693019, now seen corresponding path program 1 times [2020-10-26 21:04:19,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:04:19,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670839224] [2020-10-26 21:04:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:04:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:19,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:19,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:21,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:24,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:24,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 941 [2020-10-26 21:04:24,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:04:24,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 21:04:24,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:24,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:04:24,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-26 21:04:24,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 21:04:24,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:24,866 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:04:24,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:04:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:24,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:24,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:24,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:04:24,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:24,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 21:04:24,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:24,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:04:24,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:04:24,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:04:24,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:24,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:04:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:24,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:24,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:24,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:04:24,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:24,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 21:04:24,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:24,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:04:24,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:04:24,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:04:24,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:24,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 21:04:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:24,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:24,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:24,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 21:04:24,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:24,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 21:04:24,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:24,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:04:24,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:04:24,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 21:04:24,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:24,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-26 21:04:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:24,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:25,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:25,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 21:04:25,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:25,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-26 21:04:25,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:25,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:04:25,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:04:25,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 21:04:25,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:25,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-26 21:04:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:25,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:25,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:25,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-26 21:04:25,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:25,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 21:04:25,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:25,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:04:25,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 21:04:25,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:04:25,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 132 proven. 14 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-26 21:04:25,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670839224] [2020-10-26 21:04:25,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:04:25,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:04:25,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321165309] [2020-10-26 21:04:25,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:04:25,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:04:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:04:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:04:25,712 INFO L87 Difference]: Start difference. First operand 11258 states and 14313 transitions. Second operand 7 states. [2020-10-26 21:04:26,042 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:04:33,067 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:04:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:04:40,750 INFO L93 Difference]: Finished difference Result 25253 states and 33325 transitions. [2020-10-26 21:04:40,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:04:40,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 917 [2020-10-26 21:04:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:04:40,807 INFO L225 Difference]: With dead ends: 25253 [2020-10-26 21:04:40,807 INFO L226 Difference]: Without dead ends: 14728 [2020-10-26 21:04:40,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:04:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14728 states. [2020-10-26 21:04:41,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14728 to 14683. [2020-10-26 21:04:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14683 states. [2020-10-26 21:04:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14683 states to 14683 states and 18087 transitions. [2020-10-26 21:04:41,148 INFO L78 Accepts]: Start accepts. Automaton has 14683 states and 18087 transitions. Word has length 917 [2020-10-26 21:04:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:04:41,149 INFO L481 AbstractCegarLoop]: Abstraction has 14683 states and 18087 transitions. [2020-10-26 21:04:41,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:04:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 14683 states and 18087 transitions. [2020-10-26 21:04:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2020-10-26 21:04:41,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:04:41,185 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:04:41,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 21:04:41,185 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:04:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:04:41,186 INFO L82 PathProgramCache]: Analyzing trace with hash -858023335, now seen corresponding path program 1 times [2020-10-26 21:04:41,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:04:41,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130120749] [2020-10-26 21:04:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:04:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:41,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:41,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:41,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:46,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:46,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 961 [2020-10-26 21:04:46,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:04:46,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 21:04:46,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:04:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-26 21:04:46,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:04:46,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:46,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:04:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:46,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:46,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:46,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:04:46,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:46,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 21:04:46,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:46,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:04:46,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:04:46,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:04:46,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:46,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:04:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:46,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:46,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:46,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-26 21:04:46,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:46,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 21:04:46,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:46,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:04:46,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:04:46,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 21:04:46,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:46,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-26 21:04:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:46,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:46,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:46,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 21:04:46,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:46,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-26 21:04:46,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:46,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:04:46,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:04:46,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 21:04:46,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:46,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-10-26 21:04:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:04:46,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:04:46,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:04:46,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 21:04:46,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:04:46,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 21:04:46,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:04:46,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:04:46,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-26 21:04:46,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:04:46,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:04:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 134 proven. 30 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-26 21:04:47,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130120749] [2020-10-26 21:04:47,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:04:47,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 21:04:47,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987005928] [2020-10-26 21:04:47,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:04:47,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:04:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:04:47,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:04:47,335 INFO L87 Difference]: Start difference. First operand 14683 states and 18087 transitions. Second operand 8 states. [2020-10-26 21:04:47,607 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-26 21:04:49,470 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-26 21:04:51,054 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-26 21:05:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:05:18,511 INFO L93 Difference]: Finished difference Result 66703 states and 86442 transitions. [2020-10-26 21:05:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 21:05:18,512 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 939 [2020-10-26 21:05:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:05:18,700 INFO L225 Difference]: With dead ends: 66703 [2020-10-26 21:05:18,700 INFO L226 Difference]: Without dead ends: 52753 [2020-10-26 21:05:18,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 21:05:18,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52753 states. [2020-10-26 21:05:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52753 to 50191. [2020-10-26 21:05:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50191 states. [2020-10-26 21:05:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50191 states to 50191 states and 63131 transitions. [2020-10-26 21:05:19,860 INFO L78 Accepts]: Start accepts. Automaton has 50191 states and 63131 transitions. Word has length 939 [2020-10-26 21:05:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:05:19,861 INFO L481 AbstractCegarLoop]: Abstraction has 50191 states and 63131 transitions. [2020-10-26 21:05:19,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:05:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 50191 states and 63131 transitions. [2020-10-26 21:05:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1025 [2020-10-26 21:05:19,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:05:19,947 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:19,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 21:05:19,947 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:05:19,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:05:19,948 INFO L82 PathProgramCache]: Analyzing trace with hash -572502454, now seen corresponding path program 1 times [2020-10-26 21:05:19,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:05:19,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214686559] [2020-10-26 21:05:19,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:05:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:05:20,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:05:20,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking...