/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 13:03:47,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 13:03:47,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 13:03:47,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 13:03:47,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 13:03:47,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 13:03:47,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 13:03:47,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 13:03:47,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 13:03:47,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 13:03:47,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 13:03:47,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 13:03:47,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 13:03:47,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 13:03:47,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 13:03:47,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 13:03:47,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 13:03:47,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 13:03:47,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 13:03:47,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 13:03:47,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 13:03:47,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 13:03:47,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 13:03:47,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 13:03:47,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 13:03:47,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 13:03:47,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 13:03:47,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 13:03:47,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 13:03:47,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 13:03:47,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 13:03:47,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 13:03:47,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 13:03:47,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 13:03:47,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 13:03:47,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 13:03:47,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 13:03:47,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 13:03:47,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 13:03:47,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 13:03:47,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 13:03:47,851 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 [2020-10-28 13:03:47,926 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 13:03:47,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 13:03:47,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 13:03:47,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 13:03:47,934 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 13:03:47,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 13:03:47,935 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 13:03:47,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 13:03:47,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 13:03:47,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 13:03:47,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 13:03:47,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 13:03:47,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 13:03:47,938 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 13:03:47,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 13:03:47,938 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 13:03:47,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 13:03:47,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 13:03:47,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 13:03:47,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 13:03:47,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 13:03:47,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 13:03:47,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 13:03:47,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 13:03:47,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 13:03:47,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 13:03:47,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 13:03:47,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 13:03:47,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 13:03:47,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 13:03:48,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 13:03:48,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 13:03:48,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 13:03:48,524 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 13:03:48,525 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 13:03:48,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label21.c [2020-10-28 13:03:48,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/516d788ec/aa46bc12fe6d4600ad1ce095bba52079/FLAGd8edb24ee [2020-10-28 13:03:49,806 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 13:03:49,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem15_label21.c [2020-10-28 13:03:49,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/516d788ec/aa46bc12fe6d4600ad1ce095bba52079/FLAGd8edb24ee [2020-10-28 13:03:49,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/516d788ec/aa46bc12fe6d4600ad1ce095bba52079 [2020-10-28 13:03:49,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 13:03:49,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 13:03:49,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 13:03:49,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 13:03:49,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 13:03:49,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:03:49" (1/1) ... [2020-10-28 13:03:49,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b5383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:49, skipping insertion in model container [2020-10-28 13:03:49,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:03:49" (1/1) ... [2020-10-28 13:03:49,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 13:03:50,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 13:03:51,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:03:51,111 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 13:03:51,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 13:03:51,588 INFO L208 MainTranslator]: Completed translation [2020-10-28 13:03:51,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:51 WrapperNode [2020-10-28 13:03:51,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 13:03:51,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 13:03:51,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 13:03:51,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 13:03:51,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:51" (1/1) ... [2020-10-28 13:03:51,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:51" (1/1) ... [2020-10-28 13:03:51,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:51" (1/1) ... [2020-10-28 13:03:51,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:51" (1/1) ... [2020-10-28 13:03:51,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:51" (1/1) ... [2020-10-28 13:03:51,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:51" (1/1) ... [2020-10-28 13:03:51,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:51" (1/1) ... [2020-10-28 13:03:51,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 13:03:51,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 13:03:51,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 13:03:51,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 13:03:51,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:51" (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 [2020-10-28 13:03:52,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 13:03:52,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 13:03:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 13:03:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 13:03:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 13:03:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 13:03:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 13:03:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 13:03:52,061 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 13:03:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 13:03:52,063 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 13:03:52,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 13:03:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 13:03:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 13:03:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 13:03:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 13:03:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 13:03:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 13:03:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 13:03:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 13:03:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 13:03:56,065 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 13:03:56,065 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 13:03:56,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:03:56 BoogieIcfgContainer [2020-10-28 13:03:56,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 13:03:56,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 13:03:56,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 13:03:56,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 13:03:56,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:03:49" (1/3) ... [2020-10-28 13:03:56,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b275eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:03:56, skipping insertion in model container [2020-10-28 13:03:56,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:03:51" (2/3) ... [2020-10-28 13:03:56,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b275eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:03:56, skipping insertion in model container [2020-10-28 13:03:56,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:03:56" (3/3) ... [2020-10-28 13:03:56,087 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label21.c [2020-10-28 13:03:56,103 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 13:03:56,136 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 13:03:56,154 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 13:03:56,210 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 13:03:56,210 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 13:03:56,210 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 13:03:56,211 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 13:03:56,211 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 13:03:56,211 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 13:03:56,211 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 13:03:56,211 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 13:03:56,272 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states. [2020-10-28 13:03:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 13:03:56,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:03:56,284 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] [2020-10-28 13:03:56,285 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:03:56,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:03:56,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1868936201, now seen corresponding path program 1 times [2020-10-28 13:03:56,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:03:56,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087551973] [2020-10-28 13:03:56,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:03:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:56,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:57,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:57,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 13:03:57,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:03:57,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 823 [2020-10-28 13:03:57,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:57,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:03:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:03:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 13:03:57,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 13:03:57,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:03:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:03:57,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:03:57,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:03:57,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:03:57,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:03:57,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 13:03:57,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:03:57,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:03:57,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:03:57,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:03:57,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:03:57,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:03:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:03:57,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087551973] [2020-10-28 13:03:57,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:03:57,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 13:03:57,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184760798] [2020-10-28 13:03:57,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 13:03:57,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:03:57,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 13:03:57,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 13:03:57,883 INFO L87 Difference]: Start difference. First operand 441 states. Second operand 4 states. [2020-10-28 13:04:04,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:04,729 INFO L93 Difference]: Finished difference Result 1229 states and 2206 transitions. [2020-10-28 13:04:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:04:04,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 13:04:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:04,757 INFO L225 Difference]: With dead ends: 1229 [2020-10-28 13:04:04,757 INFO L226 Difference]: Without dead ends: 709 [2020-10-28 13:04:04,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:04:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-10-28 13:04:04,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 695. [2020-10-28 13:04:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-10-28 13:04:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1081 transitions. [2020-10-28 13:04:04,955 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1081 transitions. Word has length 67 [2020-10-28 13:04:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:04,956 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1081 transitions. [2020-10-28 13:04:04,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 13:04:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1081 transitions. [2020-10-28 13:04:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 13:04:04,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:04,965 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:04:04,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 13:04:04,965 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:04,966 INFO L82 PathProgramCache]: Analyzing trace with hash -288530017, now seen corresponding path program 1 times [2020-10-28 13:04:04,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:04,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408222807] [2020-10-28 13:04:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:05,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:05,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:06,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:07,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:07,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 13:04:07,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:04:07,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2135 [2020-10-28 13:04:07,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:07,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:07,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:04:07,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:04:07,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 13:04:07,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:07,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:07,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:07,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:07,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:07,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:07,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 13:04:07,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:07,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:07,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:07,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:07,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:04:07,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:07,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:07,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:07,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:07,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 13:04:07,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:07,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-28 13:04:07,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:07,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:07,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:07,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:04:07,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 13:04:07,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:04:07,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408222807] [2020-10-28 13:04:07,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:04:07,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:04:07,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245835022] [2020-10-28 13:04:07,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:04:07,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:07,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:04:07,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:04:07,626 INFO L87 Difference]: Start difference. First operand 695 states and 1081 transitions. Second operand 7 states. [2020-10-28 13:04:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:15,960 INFO L93 Difference]: Finished difference Result 1732 states and 2755 transitions. [2020-10-28 13:04:15,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:04:15,965 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 137 [2020-10-28 13:04:15,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:15,976 INFO L225 Difference]: With dead ends: 1732 [2020-10-28 13:04:15,976 INFO L226 Difference]: Without dead ends: 1043 [2020-10-28 13:04:15,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:04:15,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2020-10-28 13:04:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1005. [2020-10-28 13:04:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1005 states. [2020-10-28 13:04:16,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1356 transitions. [2020-10-28 13:04:16,037 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1356 transitions. Word has length 137 [2020-10-28 13:04:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:16,040 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 1356 transitions. [2020-10-28 13:04:16,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:04:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1356 transitions. [2020-10-28 13:04:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-28 13:04:16,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:16,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:04:16,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 13:04:16,055 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:16,056 INFO L82 PathProgramCache]: Analyzing trace with hash -941988633, now seen corresponding path program 1 times [2020-10-28 13:04:16,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:16,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082752518] [2020-10-28 13:04:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:16,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:16,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:17,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:17,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:17,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-28 13:04:17,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:04:17,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1671 [2020-10-28 13:04:17,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:17,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:17,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:04:17,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:04:17,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 13:04:17,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:17,960 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 13:04:17,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:17,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:17,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:17,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:17,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:17,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 13:04:17,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:17,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:04:17,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:18,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:18,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:18,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:18,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 13:04:18,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:18,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-28 13:04:18,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:18,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:18,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:18,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:04:18,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 13:04:18,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:04:18,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082752518] [2020-10-28 13:04:18,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:04:18,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 13:04:18,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412369992] [2020-10-28 13:04:18,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:04:18,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:04:18,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:04:18,243 INFO L87 Difference]: Start difference. First operand 1005 states and 1356 transitions. Second operand 7 states. [2020-10-28 13:04:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:28,075 INFO L93 Difference]: Finished difference Result 2383 states and 3374 transitions. [2020-10-28 13:04:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:04:28,076 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2020-10-28 13:04:28,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:28,086 INFO L225 Difference]: With dead ends: 2383 [2020-10-28 13:04:28,086 INFO L226 Difference]: Without dead ends: 1691 [2020-10-28 13:04:28,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:04:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2020-10-28 13:04:28,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1659. [2020-10-28 13:04:28,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1659 states. [2020-10-28 13:04:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2067 transitions. [2020-10-28 13:04:28,148 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2067 transitions. Word has length 141 [2020-10-28 13:04:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:28,149 INFO L481 AbstractCegarLoop]: Abstraction has 1659 states and 2067 transitions. [2020-10-28 13:04:28,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:04:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2067 transitions. [2020-10-28 13:04:28,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-28 13:04:28,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:28,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:04:28,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 13:04:28,152 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:28,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1301947549, now seen corresponding path program 1 times [2020-10-28 13:04:28,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:28,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028519418] [2020-10-28 13:04:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:28,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:28,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:28,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:28,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-28 13:04:28,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:04:28,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-28 13:04:28,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:28,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:28,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:28,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 13:04:28,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 13:04:28,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:28,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:28,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:28,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:28,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:28,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:28,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 13:04:28,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:28,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:28,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:04:28,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:28,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:04:28,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:28,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:28,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:28,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:28,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 13:04:28,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:28,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-28 13:04:28,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:28,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:28,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:28,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:28,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 13:04:28,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:04:28,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028519418] [2020-10-28 13:04:28,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:04:28,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:04:28,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773434230] [2020-10-28 13:04:28,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:04:28,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:28,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:04:28,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:04:28,938 INFO L87 Difference]: Start difference. First operand 1659 states and 2067 transitions. Second operand 5 states. [2020-10-28 13:04:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:42,041 INFO L93 Difference]: Finished difference Result 4270 states and 5491 transitions. [2020-10-28 13:04:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:04:42,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-28 13:04:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:42,064 INFO L225 Difference]: With dead ends: 4270 [2020-10-28 13:04:42,064 INFO L226 Difference]: Without dead ends: 2286 [2020-10-28 13:04:42,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:04:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2020-10-28 13:04:42,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2284. [2020-10-28 13:04:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2284 states. [2020-10-28 13:04:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2646 transitions. [2020-10-28 13:04:42,137 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2646 transitions. Word has length 162 [2020-10-28 13:04:42,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:42,138 INFO L481 AbstractCegarLoop]: Abstraction has 2284 states and 2646 transitions. [2020-10-28 13:04:42,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:04:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2646 transitions. [2020-10-28 13:04:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-28 13:04:42,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:42,142 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:04:42,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 13:04:42,142 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:42,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1100109058, now seen corresponding path program 1 times [2020-10-28 13:04:42,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:42,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920707467] [2020-10-28 13:04:42,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:42,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:42,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:43,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:45,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:45,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-28 13:04:45,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:04:45,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3224 [2020-10-28 13:04:45,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:45,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:45,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 13:04:45,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 13:04:45,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-28 13:04:45,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:04:45,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:45,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:45,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:45,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:45,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:45,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 13:04:45,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:45,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:45,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:04:45,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:45,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:04:45,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:45,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:45,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:46,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:46,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 13:04:46,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:46,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-28 13:04:46,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:46,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:46,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:46,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:04:46,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-28 13:04:46,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:04:46,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920707467] [2020-10-28 13:04:46,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 13:04:46,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 13:04:46,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097309864] [2020-10-28 13:04:46,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 13:04:46,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:04:46,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 13:04:46,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 13:04:46,579 INFO L87 Difference]: Start difference. First operand 2284 states and 2646 transitions. Second operand 8 states. [2020-10-28 13:04:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:04:57,098 INFO L93 Difference]: Finished difference Result 4305 states and 5041 transitions. [2020-10-28 13:04:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 13:04:57,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 267 [2020-10-28 13:04:57,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:04:57,118 INFO L225 Difference]: With dead ends: 4305 [2020-10-28 13:04:57,119 INFO L226 Difference]: Without dead ends: 2334 [2020-10-28 13:04:57,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:04:57,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2020-10-28 13:04:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2298. [2020-10-28 13:04:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2298 states. [2020-10-28 13:04:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 2663 transitions. [2020-10-28 13:04:57,208 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 2663 transitions. Word has length 267 [2020-10-28 13:04:57,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:04:57,210 INFO L481 AbstractCegarLoop]: Abstraction has 2298 states and 2663 transitions. [2020-10-28 13:04:57,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 13:04:57,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 2663 transitions. [2020-10-28 13:04:57,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-28 13:04:57,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:04:57,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:04:57,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 13:04:57,216 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:04:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:04:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1758480, now seen corresponding path program 1 times [2020-10-28 13:04:57,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:04:57,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180045502] [2020-10-28 13:04:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:04:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:57,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:57,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:58,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:59,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:59,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-28 13:04:59,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:04:59,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2181 [2020-10-28 13:04:59,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:59,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:59,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:04:59,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 247 [2020-10-28 13:04:59,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 13:04:59,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:59,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:04:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:59,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:04:59,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:04:59,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:04:59,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:04:59,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:04:59,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:04:59,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:04:59,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:04:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:04:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:04:59,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:04:59,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:04:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:04:59,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:00,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:00,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-28 13:05:00,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:00,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-28 13:05:00,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:00,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:00,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:00,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:00,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-28 13:05:00,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:05:00,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180045502] [2020-10-28 13:05:00,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:00,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:05:00,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400489989] [2020-10-28 13:05:00,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:05:00,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:00,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:05:00,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:05:00,270 INFO L87 Difference]: Start difference. First operand 2298 states and 2663 transitions. Second operand 5 states. [2020-10-28 13:05:08,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:08,254 INFO L93 Difference]: Finished difference Result 6186 states and 7351 transitions. [2020-10-28 13:05:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:05:08,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 304 [2020-10-28 13:05:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:08,280 INFO L225 Difference]: With dead ends: 6186 [2020-10-28 13:05:08,280 INFO L226 Difference]: Without dead ends: 4201 [2020-10-28 13:05:08,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:05:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-10-28 13:05:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4190. [2020-10-28 13:05:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4190 states. [2020-10-28 13:05:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4190 states to 4190 states and 4774 transitions. [2020-10-28 13:05:08,410 INFO L78 Accepts]: Start accepts. Automaton has 4190 states and 4774 transitions. Word has length 304 [2020-10-28 13:05:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:08,411 INFO L481 AbstractCegarLoop]: Abstraction has 4190 states and 4774 transitions. [2020-10-28 13:05:08,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:05:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 4190 states and 4774 transitions. [2020-10-28 13:05:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-28 13:05:08,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:08,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:05:08,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 13:05:08,419 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:08,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:08,419 INFO L82 PathProgramCache]: Analyzing trace with hash 728095683, now seen corresponding path program 1 times [2020-10-28 13:05:08,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:08,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915934639] [2020-10-28 13:05:08,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:08,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:08,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:10,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:10,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 365 [2020-10-28 13:05:10,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:05:10,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2039 [2020-10-28 13:05:10,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:10,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:10,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:10,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 296 [2020-10-28 13:05:10,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 13:05:10,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:10,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:10,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:10,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:10,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:10,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:10,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 13:05:10,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:10,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:10,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:10,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:10,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:10,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:05:10,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:10,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:11,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:11,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:05:11,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:11,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-28 13:05:11,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:11,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:11,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:11,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:11,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-28 13:05:11,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 13:05:11,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915934639] [2020-10-28 13:05:11,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:11,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:05:11,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064908132] [2020-10-28 13:05:11,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:05:11,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:11,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:05:11,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:05:11,589 INFO L87 Difference]: Start difference. First operand 4190 states and 4774 transitions. Second operand 5 states. [2020-10-28 13:05:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:21,500 INFO L93 Difference]: Finished difference Result 9647 states and 11320 transitions. [2020-10-28 13:05:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:05:21,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 353 [2020-10-28 13:05:21,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:21,529 INFO L225 Difference]: With dead ends: 9647 [2020-10-28 13:05:21,530 INFO L226 Difference]: Without dead ends: 5770 [2020-10-28 13:05:21,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:05:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5770 states. [2020-10-28 13:05:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5770 to 5762. [2020-10-28 13:05:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5762 states. [2020-10-28 13:05:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5762 states to 5762 states and 6516 transitions. [2020-10-28 13:05:21,705 INFO L78 Accepts]: Start accepts. Automaton has 5762 states and 6516 transitions. Word has length 353 [2020-10-28 13:05:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:21,709 INFO L481 AbstractCegarLoop]: Abstraction has 5762 states and 6516 transitions. [2020-10-28 13:05:21,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:05:21,709 INFO L276 IsEmpty]: Start isEmpty. Operand 5762 states and 6516 transitions. [2020-10-28 13:05:21,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-10-28 13:05:21,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:21,719 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:05:21,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 13:05:21,720 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:21,721 INFO L82 PathProgramCache]: Analyzing trace with hash 135427606, now seen corresponding path program 1 times [2020-10-28 13:05:21,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:21,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493617923] [2020-10-28 13:05:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:21,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:22,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:25,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:25,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 466 [2020-10-28 13:05:25,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 13:05:25,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3282 [2020-10-28 13:05:25,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:25,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 284 [2020-10-28 13:05:25,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-28 13:05:25,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:25,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:25,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:25,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:25,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:25,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:25,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:05:25,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:25,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:25,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:25,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:25,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:25,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:25,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:25,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:25,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:25,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-28 13:05:25,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:25,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-28 13:05:25,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:25,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:25,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:25,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:25,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-28 13:05:25,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:25,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-10-28 13:05:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:25,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:26,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:26,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:05:26,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:26,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-28 13:05:26,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:26,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:26,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:26,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:05:26,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-28 13:05:26,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 226 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 13:05:26,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493617923] [2020-10-28 13:05:26,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:26,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:05:26,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77163955] [2020-10-28 13:05:26,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:05:26,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:26,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:05:26,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:05:26,715 INFO L87 Difference]: Start difference. First operand 5762 states and 6516 transitions. Second operand 7 states. [2020-10-28 13:05:30,464 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 13:05:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:36,993 INFO L93 Difference]: Finished difference Result 12240 states and 13844 transitions. [2020-10-28 13:05:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 13:05:37,001 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 452 [2020-10-28 13:05:37,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:37,035 INFO L225 Difference]: With dead ends: 12240 [2020-10-28 13:05:37,035 INFO L226 Difference]: Without dead ends: 6791 [2020-10-28 13:05:37,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 13:05:37,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6791 states. [2020-10-28 13:05:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6791 to 5829. [2020-10-28 13:05:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5829 states. [2020-10-28 13:05:37,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5829 states to 5829 states and 6619 transitions. [2020-10-28 13:05:37,224 INFO L78 Accepts]: Start accepts. Automaton has 5829 states and 6619 transitions. Word has length 452 [2020-10-28 13:05:37,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:37,225 INFO L481 AbstractCegarLoop]: Abstraction has 5829 states and 6619 transitions. [2020-10-28 13:05:37,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:05:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 5829 states and 6619 transitions. [2020-10-28 13:05:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-10-28 13:05:37,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:37,237 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:05:37,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 13:05:37,238 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:37,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:37,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2102419230, now seen corresponding path program 1 times [2020-10-28 13:05:37,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:37,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781942405] [2020-10-28 13:05:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:37,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:38,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:38,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 478 [2020-10-28 13:05:38,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:38,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-28 13:05:38,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:38,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:38,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:38,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:05:38,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 13:05:38,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:38,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:38,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:38,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:38,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:38,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:38,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:05:38,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:38,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:38,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:38,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:38,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:38,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:38,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:38,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:38,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:38,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:05:38,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:38,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-28 13:05:38,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:38,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:38,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:38,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:38,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:05:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:38,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:39,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:39,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:05:39,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:39,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-28 13:05:39,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:39,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:39,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:39,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:05:39,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-28 13:05:39,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781942405] [2020-10-28 13:05:39,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:39,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:05:39,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606411923] [2020-10-28 13:05:39,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:05:39,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:39,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:05:39,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:05:39,369 INFO L87 Difference]: Start difference. First operand 5829 states and 6619 transitions. Second operand 5 states. [2020-10-28 13:05:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:05:45,766 INFO L93 Difference]: Finished difference Result 11348 states and 12938 transitions. [2020-10-28 13:05:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:05:45,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 464 [2020-10-28 13:05:45,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:05:45,808 INFO L225 Difference]: With dead ends: 11348 [2020-10-28 13:05:45,808 INFO L226 Difference]: Without dead ends: 5832 [2020-10-28 13:05:45,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:05:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5832 states. [2020-10-28 13:05:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5832 to 5814. [2020-10-28 13:05:45,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5814 states. [2020-10-28 13:05:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5814 states to 5814 states and 6417 transitions. [2020-10-28 13:05:45,982 INFO L78 Accepts]: Start accepts. Automaton has 5814 states and 6417 transitions. Word has length 464 [2020-10-28 13:05:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:05:45,984 INFO L481 AbstractCegarLoop]: Abstraction has 5814 states and 6417 transitions. [2020-10-28 13:05:45,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:05:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 5814 states and 6417 transitions. [2020-10-28 13:05:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-10-28 13:05:45,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:05:46,000 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 13:05:46,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 13:05:46,000 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:05:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:05:46,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1467100404, now seen corresponding path program 1 times [2020-10-28 13:05:46,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:05:46,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119809772] [2020-10-28 13:05:46,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:05:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:46,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:47,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:48,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:51,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:51,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 514 [2020-10-28 13:05:51,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:05:51,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 13:05:51,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:51,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:51,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:05:51,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 445 [2020-10-28 13:05:51,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 13:05:51,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:51,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:05:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:51,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:51,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:51,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:05:51,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:51,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:05:51,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:51,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:51,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:51,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:51,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:51,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:51,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:05:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:51,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:51,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:51,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:05:51,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:51,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-28 13:05:51,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:51,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:51,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:05:51,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:51,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:05:51,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:51,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:05:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:05:51,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:05:51,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:05:51,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-28 13:05:51,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:05:51,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-28 13:05:51,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:05:51,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:05:51,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:05:51,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:05:51,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-28 13:05:51,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:05:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-28 13:05:52,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119809772] [2020-10-28 13:05:52,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:05:52,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:05:52,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127440282] [2020-10-28 13:05:52,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:05:52,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:05:52,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:05:52,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:05:52,162 INFO L87 Difference]: Start difference. First operand 5814 states and 6417 transitions. Second operand 5 states. [2020-10-28 13:06:00,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:06:00,366 INFO L93 Difference]: Finished difference Result 13833 states and 15498 transitions. [2020-10-28 13:06:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:06:00,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 500 [2020-10-28 13:06:00,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:06:00,400 INFO L225 Difference]: With dead ends: 13833 [2020-10-28 13:06:00,400 INFO L226 Difference]: Without dead ends: 8332 [2020-10-28 13:06:00,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:06:00,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8332 states. [2020-10-28 13:06:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8332 to 7386. [2020-10-28 13:06:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7386 states. [2020-10-28 13:06:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7386 states to 7386 states and 8205 transitions. [2020-10-28 13:06:00,607 INFO L78 Accepts]: Start accepts. Automaton has 7386 states and 8205 transitions. Word has length 500 [2020-10-28 13:06:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:06:00,608 INFO L481 AbstractCegarLoop]: Abstraction has 7386 states and 8205 transitions. [2020-10-28 13:06:00,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:06:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 7386 states and 8205 transitions. [2020-10-28 13:06:00,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2020-10-28 13:06:00,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:06:00,618 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 13:06:00,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 13:06:00,619 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:06:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:06:00,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1757893398, now seen corresponding path program 1 times [2020-10-28 13:06:00,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:06:00,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508916596] [2020-10-28 13:06:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:06:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:00,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:01,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:02,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:03,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:03,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 558 [2020-10-28 13:06:03,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:06:03,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2695 [2020-10-28 13:06:03,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:03,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:03,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:03,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:06:03,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 13:06:03,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:03,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:06:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:03,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:03,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:03,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:06:03,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:03,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:06:03,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:03,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:03,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:03,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:03,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:03,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:06:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:03,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:03,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:03,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:06:03,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:03,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-28 13:06:03,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:03,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:03,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:03,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:03,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:03,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:03,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:06:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:03,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:04,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:04,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:06:04,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:04,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 13:06:04,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:04,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:04,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:06:04,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:04,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:06:04,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:04,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:06:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:04,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:04,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:04,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 13:06:04,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:04,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-28 13:06:04,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:04,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:04,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:04,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:06:04,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 13:06:04,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 13:06:04,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508916596] [2020-10-28 13:06:04,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:06:04,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:06:04,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002688593] [2020-10-28 13:06:04,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:06:04,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:06:04,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:06:04,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:06:04,686 INFO L87 Difference]: Start difference. First operand 7386 states and 8205 transitions. Second operand 7 states. [2020-10-28 13:06:17,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:06:17,026 INFO L93 Difference]: Finished difference Result 16711 states and 18833 transitions. [2020-10-28 13:06:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 13:06:17,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 542 [2020-10-28 13:06:17,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:06:17,062 INFO L225 Difference]: With dead ends: 16711 [2020-10-28 13:06:17,063 INFO L226 Difference]: Without dead ends: 9638 [2020-10-28 13:06:17,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-28 13:06:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9638 states. [2020-10-28 13:06:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9638 to 9608. [2020-10-28 13:06:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9608 states. [2020-10-28 13:06:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9608 states to 9608 states and 10612 transitions. [2020-10-28 13:06:17,289 INFO L78 Accepts]: Start accepts. Automaton has 9608 states and 10612 transitions. Word has length 542 [2020-10-28 13:06:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:06:17,291 INFO L481 AbstractCegarLoop]: Abstraction has 9608 states and 10612 transitions. [2020-10-28 13:06:17,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:06:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 9608 states and 10612 transitions. [2020-10-28 13:06:17,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2020-10-28 13:06:17,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:06:17,303 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:06:17,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 13:06:17,304 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:06:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:06:17,305 INFO L82 PathProgramCache]: Analyzing trace with hash -642710586, now seen corresponding path program 1 times [2020-10-28 13:06:17,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:06:17,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943822527] [2020-10-28 13:06:17,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:06:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:17,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:17,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:19,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:22,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:22,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:22,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 623 [2020-10-28 13:06:22,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:06:22,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-28 13:06:22,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:22,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:22,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:22,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 480 [2020-10-28 13:06:22,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 13:06:22,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 13:06:22,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:06:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:22,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:22,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:22,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:06:22,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:22,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 13:06:22,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:22,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:22,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:22,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:22,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:22,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:22,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:06:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:22,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:22,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:22,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:06:22,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:22,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-28 13:06:22,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:22,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:22,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:22,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:22,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:22,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:23,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:06:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:23,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:23,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:23,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:06:23,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:23,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 13:06:23,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:23,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:23,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:23,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:23,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:23,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:23,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:06:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:23,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:23,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:23,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 13:06:23,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:23,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-28 13:06:23,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:23,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:23,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:06:23,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:23,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 13:06:23,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:23,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-10-28 13:06:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:23,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:23,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:23,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 13:06:23,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:23,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-28 13:06:23,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:23,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:23,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:23,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:06:23,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 13:06:23,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 450 proven. 2 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-10-28 13:06:23,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943822527] [2020-10-28 13:06:23,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:06:23,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:06:23,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351901487] [2020-10-28 13:06:23,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:06:23,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:06:23,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:06:23,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:06:23,950 INFO L87 Difference]: Start difference. First operand 9608 states and 10612 transitions. Second operand 7 states. [2020-10-28 13:06:24,110 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:06:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:06:37,578 INFO L93 Difference]: Finished difference Result 22035 states and 24748 transitions. [2020-10-28 13:06:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:06:37,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 605 [2020-10-28 13:06:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:06:37,640 INFO L225 Difference]: With dead ends: 22035 [2020-10-28 13:06:37,641 INFO L226 Difference]: Without dead ends: 11788 [2020-10-28 13:06:37,670 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 [2020-10-28 13:06:37,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11788 states. [2020-10-28 13:06:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11788 to 9899. [2020-10-28 13:06:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9899 states. [2020-10-28 13:06:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9899 states to 9899 states and 10791 transitions. [2020-10-28 13:06:37,932 INFO L78 Accepts]: Start accepts. Automaton has 9899 states and 10791 transitions. Word has length 605 [2020-10-28 13:06:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:06:37,934 INFO L481 AbstractCegarLoop]: Abstraction has 9899 states and 10791 transitions. [2020-10-28 13:06:37,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:06:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 9899 states and 10791 transitions. [2020-10-28 13:06:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2020-10-28 13:06:37,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:06:37,957 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:06:37,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 13:06:37,957 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:06:37,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:06:37,958 INFO L82 PathProgramCache]: Analyzing trace with hash -571607467, now seen corresponding path program 1 times [2020-10-28 13:06:37,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:06:37,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481923687] [2020-10-28 13:06:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:06:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:38,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:38,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:41,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:42,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:43,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:43,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 680 [2020-10-28 13:06:43,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 13:06:43,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-28 13:06:43,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:43,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:43,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:43,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:06:43,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-28 13:06:43,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:43,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:06:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:43,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:43,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:43,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:06:43,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:43,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 13:06:43,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:43,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:43,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:43,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:43,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:43,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:43,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:06:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:43,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:43,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:43,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:06:43,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:43,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-28 13:06:43,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:43,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:43,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:43,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:43,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:43,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:43,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:06:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:43,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:43,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:43,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:06:43,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:43,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-28 13:06:43,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:43,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:06:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:06:43,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:06:43,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:44,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:06:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:44,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:44,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:44,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-28 13:06:44,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:44,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-28 13:06:44,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:44,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:44,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:06:44,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:06:44,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-28 13:06:44,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:44,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 531 [2020-10-28 13:06:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:44,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:44,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:06:44,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 13:06:44,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:06:44,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 13:06:44,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:06:44,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:06:44,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:06:44,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-28 13:06:44,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:06:44,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:06:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 478 proven. 71 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-10-28 13:06:44,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481923687] [2020-10-28 13:06:44,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:06:44,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:06:44,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179326331] [2020-10-28 13:06:44,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:06:44,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:06:44,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:06:44,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:06:44,670 INFO L87 Difference]: Start difference. First operand 9899 states and 10791 transitions. Second operand 7 states. [2020-10-28 13:06:49,179 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 13:06:58,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:06:58,635 INFO L93 Difference]: Finished difference Result 24368 states and 27318 transitions. [2020-10-28 13:06:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 13:06:58,640 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 662 [2020-10-28 13:06:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:06:58,708 INFO L225 Difference]: With dead ends: 24368 [2020-10-28 13:06:58,708 INFO L226 Difference]: Without dead ends: 14782 [2020-10-28 13:06:58,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 13:06:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14782 states. [2020-10-28 13:06:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14782 to 14659. [2020-10-28 13:06:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14659 states. [2020-10-28 13:06:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14659 states to 14659 states and 16167 transitions. [2020-10-28 13:06:59,123 INFO L78 Accepts]: Start accepts. Automaton has 14659 states and 16167 transitions. Word has length 662 [2020-10-28 13:06:59,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:06:59,124 INFO L481 AbstractCegarLoop]: Abstraction has 14659 states and 16167 transitions. [2020-10-28 13:06:59,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 13:06:59,124 INFO L276 IsEmpty]: Start isEmpty. Operand 14659 states and 16167 transitions. [2020-10-28 13:06:59,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2020-10-28 13:06:59,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:06:59,144 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 13:06:59,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 13:06:59,144 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:06:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:06:59,145 INFO L82 PathProgramCache]: Analyzing trace with hash 915825102, now seen corresponding path program 1 times [2020-10-28 13:06:59,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:06:59,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691523736] [2020-10-28 13:06:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:06:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:06:59,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:06:59,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:00,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:02,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:04,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:04,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:04,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 688 [2020-10-28 13:07:04,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 13:07:04,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-28 13:07:04,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:04,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:04,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:07:04,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 537 [2020-10-28 13:07:04,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:07:04,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:04,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:07:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:04,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:04,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:04,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:07:04,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:04,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:07:04,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:04,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:04,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:04,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:04,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:04,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:04,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:07:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:04,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:04,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:04,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:07:04,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:04,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-28 13:07:04,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:04,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:04,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:04,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:04,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:04,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:04,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:07:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:04,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:05,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:05,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:07:05,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:05,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 13:07:05,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:05,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:05,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:05,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:05,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:05,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:05,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:07:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:05,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:05,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:05,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 13:07:05,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:05,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-28 13:07:05,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:05,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:05,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:07:05,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-28 13:07:05,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 13:07:05,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:05,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 533 [2020-10-28 13:07:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:05,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:05,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:05,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 13:07:05,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:05,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 13:07:05,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:05,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:05,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:05,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-28 13:07:05,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:05,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 250 proven. 2 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2020-10-28 13:07:05,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691523736] [2020-10-28 13:07:05,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:07:05,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 13:07:05,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932351468] [2020-10-28 13:07:05,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 13:07:05,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:07:05,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 13:07:05,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 13:07:05,507 INFO L87 Difference]: Start difference. First operand 14659 states and 16167 transitions. Second operand 5 states. [2020-10-28 13:07:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 13:07:12,539 INFO L93 Difference]: Finished difference Result 29320 states and 32344 transitions. [2020-10-28 13:07:12,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 13:07:12,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 670 [2020-10-28 13:07:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 13:07:12,594 INFO L225 Difference]: With dead ends: 29320 [2020-10-28 13:07:12,594 INFO L226 Difference]: Without dead ends: 14974 [2020-10-28 13:07:12,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 13:07:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14974 states. [2020-10-28 13:07:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14974 to 14655. [2020-10-28 13:07:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14655 states. [2020-10-28 13:07:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14655 states to 14655 states and 16148 transitions. [2020-10-28 13:07:12,937 INFO L78 Accepts]: Start accepts. Automaton has 14655 states and 16148 transitions. Word has length 670 [2020-10-28 13:07:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 13:07:12,938 INFO L481 AbstractCegarLoop]: Abstraction has 14655 states and 16148 transitions. [2020-10-28 13:07:12,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 13:07:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 14655 states and 16148 transitions. [2020-10-28 13:07:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2020-10-28 13:07:12,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 13:07:12,955 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 13:07:12,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 13:07:12,955 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 13:07:12,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 13:07:12,956 INFO L82 PathProgramCache]: Analyzing trace with hash -690809472, now seen corresponding path program 1 times [2020-10-28 13:07:12,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 13:07:12,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049986990] [2020-10-28 13:07:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 13:07:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:13,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:13,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:15,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:17,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:17,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 704 [2020-10-28 13:07:17,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 13:07:17,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4023 [2020-10-28 13:07:17,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:17,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:17,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:07:17,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 409 [2020-10-28 13:07:17,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 227 [2020-10-28 13:07:17,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:17,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 13:07:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:17,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:17,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:17,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 13:07:17,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:17,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 13:07:17,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:17,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:17,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:17,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:17,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:17,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:17,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 13:07:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:17,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:17,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:17,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-28 13:07:17,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:17,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-28 13:07:17,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:17,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:17,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 13:07:17,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:17,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 13:07:17,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:17,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-10-28 13:07:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:17,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:17,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:17,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 13:07:17,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:17,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 13:07:17,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:17,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:17,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 13:07:17,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 13:07:17,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 13:07:17,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:17,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 405 [2020-10-28 13:07:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 13:07:17,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 13:07:18,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 13:07:18,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-28 13:07:18,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 13:07:18,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 330 [2020-10-28 13:07:18,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 13:07:18,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 13:07:18,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 13:07:18,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 13:07:18,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 225 [2020-10-28 13:07:18,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 13:07:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 511 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-28 13:07:18,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049986990] [2020-10-28 13:07:18,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 13:07:18,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 13:07:18,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059703768] [2020-10-28 13:07:18,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 13:07:18,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 13:07:18,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 13:07:18,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 13:07:18,734 INFO L87 Difference]: Start difference. First operand 14655 states and 16148 transitions. Second operand 7 states. [2020-10-28 13:07:21,836 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 65