/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/loops-crafted-1/in-de32.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:05:50,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:05:50,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:05:50,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:05:50,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:05:50,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:05:50,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:05:50,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:05:51,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:05:51,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:05:51,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:05:51,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:05:51,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:05:51,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:05:51,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:05:51,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:05:51,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:05:51,027 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:05:51,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:05:51,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:05:51,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:05:51,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:05:51,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:05:51,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:05:51,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:05:51,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:05:51,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:05:51,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:05:51,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:05:51,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:05:51,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:05:51,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:05:51,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:05:51,086 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:05:51,087 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:05:51,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:05:51,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:05:51,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:05:51,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:05:51,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:05:51,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:05:51,096 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 15:05:51,152 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:05:51,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:05:51,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:05:51,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:05:51,157 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:05:51,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:05:51,158 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:05:51,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:05:51,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:05:51,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:05:51,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:05:51,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:05:51,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:05:51,161 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:05:51,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:05:51,161 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:05:51,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:05:51,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:05:51,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:05:51,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:05:51,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:05:51,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:05:51,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:05:51,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:05:51,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:05:51,164 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:05:51,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:05:51,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:05:51,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:05:51,165 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:05:51,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:05:51,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:05:51,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:05:51,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:05:51,673 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:05:51,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de32.c [2020-10-28 15:05:51,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbad9f785/f754600501f9462bba3ea5a3271f2558/FLAGd8642b065 [2020-10-28 15:05:52,400 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:05:52,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de32.c [2020-10-28 15:05:52,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbad9f785/f754600501f9462bba3ea5a3271f2558/FLAGd8642b065 [2020-10-28 15:05:52,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbad9f785/f754600501f9462bba3ea5a3271f2558 [2020-10-28 15:05:52,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:05:52,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:05:52,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:05:52,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:05:52,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:05:52,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:05:52" (1/1) ... [2020-10-28 15:05:52,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@efdc3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:52, skipping insertion in model container [2020-10-28 15:05:52,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:05:52" (1/1) ... [2020-10-28 15:05:52,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:05:52,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:05:53,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:05:53,047 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:05:53,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:05:53,091 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:05:53,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:53 WrapperNode [2020-10-28 15:05:53,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:05:53,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:05:53,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:05:53,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:05:53,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:53" (1/1) ... [2020-10-28 15:05:53,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:53" (1/1) ... [2020-10-28 15:05:53,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:53" (1/1) ... [2020-10-28 15:05:53,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:53" (1/1) ... [2020-10-28 15:05:53,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:53" (1/1) ... [2020-10-28 15:05:53,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:53" (1/1) ... [2020-10-28 15:05:53,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:53" (1/1) ... [2020-10-28 15:05:53,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:05:53,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:05:53,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:05:53,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:05:53,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:53" (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 15:05:53,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:05:53,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:05:53,279 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:05:53,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:05:53,280 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:05:53,280 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:05:53,280 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:05:53,280 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:05:53,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:05:53,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-28 15:05:53,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:05:53,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:05:53,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:05:53,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:05:53,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:05:53,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:05:53,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:05:53,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:05:53,747 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:05:53,747 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 15:05:53,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:05:53 BoogieIcfgContainer [2020-10-28 15:05:53,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:05:53,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:05:53,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:05:53,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:05:53,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:05:52" (1/3) ... [2020-10-28 15:05:53,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0a5d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:05:53, skipping insertion in model container [2020-10-28 15:05:53,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:05:53" (2/3) ... [2020-10-28 15:05:53,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0a5d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:05:53, skipping insertion in model container [2020-10-28 15:05:53,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:05:53" (3/3) ... [2020-10-28 15:05:53,766 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de32.c [2020-10-28 15:05:53,780 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:05:53,785 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:05:53,799 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:05:53,852 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:05:53,853 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:05:53,853 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:05:53,853 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:05:53,853 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:05:53,853 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:05:53,854 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:05:53,854 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:05:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-28 15:05:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:05:53,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:53,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:53,886 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash -560740121, now seen corresponding path program 1 times [2020-10-28 15:05:53,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:53,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729974042] [2020-10-28 15:05:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:54,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:54,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:54,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:05:54,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:54,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-28 15:05:54,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:54,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:54,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:05:54,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:54,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:05:54,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:05:54,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:54,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:54,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:54,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:54,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:54,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 15:05:54,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:54,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:54,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:54,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:54,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:54,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:05:54,649 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 15:05:54,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729974042] [2020-10-28 15:05:54,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:05:54,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:05:54,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723024692] [2020-10-28 15:05:54,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:05:54,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:54,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:05:54,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:05:54,676 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-28 15:05:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:54,989 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2020-10-28 15:05:54,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:05:54,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-28 15:05:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:54,999 INFO L225 Difference]: With dead ends: 52 [2020-10-28 15:05:54,999 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 15:05:55,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:05:55,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 15:05:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 15:05:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 15:05:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-28 15:05:55,049 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2020-10-28 15:05:55,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:55,049 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-28 15:05:55,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:05:55,050 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-10-28 15:05:55,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:05:55,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:55,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:55,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:05:55,051 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:55,052 INFO L82 PathProgramCache]: Analyzing trace with hash 866261939, now seen corresponding path program 1 times [2020-10-28 15:05:55,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:55,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993127870] [2020-10-28 15:05:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:55,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:55,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:55,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:55,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:05:55,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:55,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-28 15:05:55,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:55,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:55,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:05:55,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:55,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:05:55,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:55,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:55,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:55,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:55,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:55,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:55,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:05:55,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:55,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:55,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:55,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993127870] [2020-10-28 15:05:55,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:05:55,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:05:55,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770898343] [2020-10-28 15:05:55,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:05:55,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:55,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:05:55,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:05:55,490 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-10-28 15:05:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:55,590 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-10-28 15:05:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:05:55,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 15:05:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:55,594 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:05:55,594 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 15:05:55,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 15:05:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 15:05:55,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-28 15:05:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 15:05:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-10-28 15:05:55,606 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2020-10-28 15:05:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:55,606 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-10-28 15:05:55,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:05:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-10-28 15:05:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:05:55,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:55,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:55,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:05:55,608 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:55,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:55,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1404269348, now seen corresponding path program 1 times [2020-10-28 15:05:55,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:55,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088040981] [2020-10-28 15:05:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:55,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:55,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:55,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:55,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:05:55,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:55,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-28 15:05:55,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:55,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:55,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:05:55,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:55,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:05:55,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:55,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:55,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:55,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:55,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:55,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:55,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:05:55,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:55,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:55,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:55,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:55,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:55,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:55,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088040981] [2020-10-28 15:05:55,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:05:55,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:05:55,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050486604] [2020-10-28 15:05:55,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:05:55,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:55,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:05:55,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:05:55,832 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2020-10-28 15:05:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:55,981 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-28 15:05:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:05:55,982 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-28 15:05:55,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:55,982 INFO L225 Difference]: With dead ends: 29 [2020-10-28 15:05:55,983 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:05:55,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:05:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:05:55,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 15:05:55,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:05:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-28 15:05:55,990 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2020-10-28 15:05:55,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:55,990 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-28 15:05:55,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:05:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-28 15:05:55,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:05:55,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:55,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:55,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:05:55,992 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:55,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:55,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1675587371, now seen corresponding path program 1 times [2020-10-28 15:05:55,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:55,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809016833] [2020-10-28 15:05:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:56,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:56,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:56,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:56,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:05:56,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:56,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-28 15:05:56,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:56,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:56,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:05:56,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:56,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:05:56,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:56,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:56,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:56,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:56,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:56,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:56,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:05:56,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:56,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:56,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:56,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:56,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:56,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:05:56,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809016833] [2020-10-28 15:05:56,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:56,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:05:56,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232679453] [2020-10-28 15:05:56,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:05:56,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:56,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:05:56,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:05:56,289 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2020-10-28 15:05:56,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:56,507 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-10-28 15:05:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:05:56,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-28 15:05:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:56,509 INFO L225 Difference]: With dead ends: 34 [2020-10-28 15:05:56,509 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 15:05:56,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:05:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 15:05:56,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-28 15:05:56,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 15:05:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-10-28 15:05:56,517 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 17 [2020-10-28 15:05:56,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:56,518 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-10-28 15:05:56,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:05:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-10-28 15:05:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:05:56,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:56,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:56,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:05:56,519 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:56,520 INFO L82 PathProgramCache]: Analyzing trace with hash 164096052, now seen corresponding path program 1 times [2020-10-28 15:05:56,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:56,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598584179] [2020-10-28 15:05:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:56,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:56,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:56,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:05:56,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:56,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-28 15:05:56,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:56,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:56,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:05:56,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:05:56,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:05:56,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:56,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:56,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:56,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:56,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:56,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:56,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:05:56,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:56,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:56,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:56,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:05:56,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598584179] [2020-10-28 15:05:56,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:56,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:05:56,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889286573] [2020-10-28 15:05:56,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:05:56,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:56,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:05:56,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:05:56,858 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 7 states. [2020-10-28 15:05:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:57,181 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-10-28 15:05:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:05:57,182 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-28 15:05:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:57,184 INFO L225 Difference]: With dead ends: 38 [2020-10-28 15:05:57,184 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 15:05:57,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:05:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 15:05:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-28 15:05:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:05:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-10-28 15:05:57,202 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2020-10-28 15:05:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:57,202 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-10-28 15:05:57,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:05:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-10-28 15:05:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:05:57,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:57,204 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:57,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:05:57,205 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:57,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:57,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1131462643, now seen corresponding path program 2 times [2020-10-28 15:05:57,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:57,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476617150] [2020-10-28 15:05:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:57,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:57,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:57,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:57,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:57,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:05:57,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:05:57,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-28 15:05:57,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:57,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:57,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:05:57,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:05:57,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 15:05:57,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:57,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:57,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:57,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:57,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:57,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:57,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:05:57,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:57,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:57,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:57,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:57,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:57,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:05:57,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476617150] [2020-10-28 15:05:57,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:05:57,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 15:05:57,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850749364] [2020-10-28 15:05:57,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:05:57,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:57,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:05:57,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:05:57,672 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2020-10-28 15:05:57,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:57,855 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-28 15:05:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:05:57,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-28 15:05:57,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:57,857 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:05:57,857 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 15:05:57,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:05:57,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 15:05:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 15:05:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:05:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-28 15:05:57,865 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 18 [2020-10-28 15:05:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:57,865 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-28 15:05:57,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:05:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-28 15:05:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:05:57,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:57,866 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:57,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:05:57,867 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:57,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:57,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1669470052, now seen corresponding path program 1 times [2020-10-28 15:05:57,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:57,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251969510] [2020-10-28 15:05:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:57,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:57,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:57,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:58,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:58,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:05:58,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:05:58,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-28 15:05:58,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:58,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:58,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:05:58,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:58,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:05:58,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:58,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:58,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:58,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:58,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:58,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:58,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:05:58,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:58,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:58,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:58,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:05:58,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251969510] [2020-10-28 15:05:58,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:58,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:05:58,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237513861] [2020-10-28 15:05:58,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:05:58,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:58,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:05:58,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:05:58,209 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 6 states. [2020-10-28 15:05:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:58,403 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-10-28 15:05:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:05:58,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 15:05:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:58,405 INFO L225 Difference]: With dead ends: 42 [2020-10-28 15:05:58,405 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 15:05:58,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:05:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 15:05:58,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-28 15:05:58,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 15:05:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-10-28 15:05:58,428 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 18 [2020-10-28 15:05:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:58,428 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-10-28 15:05:58,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:05:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-10-28 15:05:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:05:58,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:58,431 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:58,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:05:58,432 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:58,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:58,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1359707317, now seen corresponding path program 2 times [2020-10-28 15:05:58,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:58,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909520648] [2020-10-28 15:05:58,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:58,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:58,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:58,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:58,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:05:58,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:58,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-28 15:05:58,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:58,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:58,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:05:58,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:58,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:05:58,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:58,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:58,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:58,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:58,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:58,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:58,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:05:58,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:58,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:58,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:58,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:58,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:58,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:05:58,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909520648] [2020-10-28 15:05:58,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:58,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:05:58,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858784574] [2020-10-28 15:05:58,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:05:58,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:58,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:05:58,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:05:58,797 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 7 states. [2020-10-28 15:05:59,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:59,035 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-10-28 15:05:59,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:05:59,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-28 15:05:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:59,036 INFO L225 Difference]: With dead ends: 40 [2020-10-28 15:05:59,036 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 15:05:59,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:05:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 15:05:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-28 15:05:59,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:05:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-10-28 15:05:59,044 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 19 [2020-10-28 15:05:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:59,044 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-10-28 15:05:59,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:05:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-10-28 15:05:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-28 15:05:59,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:59,045 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:59,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:05:59,045 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:59,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1506292730, now seen corresponding path program 2 times [2020-10-28 15:05:59,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:59,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339610473] [2020-10-28 15:05:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:59,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:59,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:59,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:59,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:59,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 15:05:59,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:05:59,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-28 15:05:59,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:59,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:59,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:05:59,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:05:59,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 15:05:59,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:59,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:59,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:59,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:59,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:59,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:59,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:05:59,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:59,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:59,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:59,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:59,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:59,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:05:59,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339610473] [2020-10-28 15:05:59,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:59,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:05:59,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137661749] [2020-10-28 15:05:59,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:05:59,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:59,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:05:59,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:05:59,461 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 5 states. [2020-10-28 15:05:59,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:59,589 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-28 15:05:59,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:05:59,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-28 15:05:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:59,590 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:05:59,590 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 15:05:59,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:05:59,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 15:05:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2020-10-28 15:05:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:05:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-28 15:05:59,597 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2020-10-28 15:05:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:59,597 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-28 15:05:59,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:05:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-28 15:05:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:05:59,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:59,598 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:59,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:05:59,599 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:59,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2098018908, now seen corresponding path program 3 times [2020-10-28 15:05:59,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:59,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237710979] [2020-10-28 15:05:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:59,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:59,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:59,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:59,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:05:59,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:05:59,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-28 15:05:59,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:59,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:05:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:05:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:05:59,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:00,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:00,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:00,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:00,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:00,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:06:00,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:00,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:00,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:00,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:00,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:00,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:06:00,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237710979] [2020-10-28 15:06:00,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:00,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:06:00,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846585439] [2020-10-28 15:06:00,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:06:00,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:00,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:06:00,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:06:00,074 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2020-10-28 15:06:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:00,386 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-10-28 15:06:00,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:06:00,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-28 15:06:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:00,387 INFO L225 Difference]: With dead ends: 40 [2020-10-28 15:06:00,388 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:06:00,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:06:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-28 15:06:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 15:06:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-28 15:06:00,396 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2020-10-28 15:06:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:00,396 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-28 15:06:00,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:06:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-28 15:06:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:06:00,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:00,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:00,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:06:00,398 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:00,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:00,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2084304327, now seen corresponding path program 4 times [2020-10-28 15:06:00,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:00,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602012843] [2020-10-28 15:06:00,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:00,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:00,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:06:00,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:00,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-28 15:06:00,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:00,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:00,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:06:00,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:06:00,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:06:00,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:00,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:00,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:00,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:00,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:00,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:00,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:00,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:00,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:00,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:00,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:00,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:06:00,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602012843] [2020-10-28 15:06:00,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:00,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:06:00,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463273653] [2020-10-28 15:06:00,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:06:00,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:00,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:06:00,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:06:00,703 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 8 states. [2020-10-28 15:06:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:01,126 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-28 15:06:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:06:01,127 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-28 15:06:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:01,128 INFO L225 Difference]: With dead ends: 46 [2020-10-28 15:06:01,128 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 15:06:01,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 15:06:01,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-28 15:06:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 15:06:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-28 15:06:01,138 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2020-10-28 15:06:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:01,139 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-28 15:06:01,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:06:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-28 15:06:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:06:01,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:01,140 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:01,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:06:01,140 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash -284304954, now seen corresponding path program 5 times [2020-10-28 15:06:01,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:01,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987074236] [2020-10-28 15:06:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:01,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:01,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:06:01,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:06:01,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 718 [2020-10-28 15:06:01,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:01,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:01,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:06:01,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:01,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:06:01,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:01,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:02,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:02,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:02,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:02,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:02,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:02,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:02,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:02,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:02,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:02,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:02,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:06:02,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987074236] [2020-10-28 15:06:02,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:02,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:06:02,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668004307] [2020-10-28 15:06:02,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:06:02,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:02,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:06:02,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:06:02,014 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 8 states. [2020-10-28 15:06:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:02,375 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2020-10-28 15:06:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:06:02,376 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-28 15:06:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:02,377 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:06:02,377 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 15:06:02,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:02,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 15:06:02,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2020-10-28 15:06:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 15:06:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-10-28 15:06:02,390 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 21 [2020-10-28 15:06:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:02,390 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-10-28 15:06:02,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:06:02,391 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-10-28 15:06:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:06:02,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:02,392 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:02,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:06:02,392 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:02,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1407661564, now seen corresponding path program 6 times [2020-10-28 15:06:02,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:02,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773601189] [2020-10-28 15:06:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:02,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:02,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:03,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:03,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:06:03,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:03,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 639 [2020-10-28 15:06:03,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:03,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:03,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:06:03,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:06:03,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:06:03,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:03,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:03,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:03,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:03,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:03,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:03,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:03,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:03,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:03,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:03,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:03,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:03,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:06:03,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773601189] [2020-10-28 15:06:03,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:03,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:06:03,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823838642] [2020-10-28 15:06:03,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:06:03,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:03,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:06:03,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:06:03,188 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 9 states. [2020-10-28 15:06:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:03,943 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-10-28 15:06:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:06:03,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 15:06:03,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:03,946 INFO L225 Difference]: With dead ends: 59 [2020-10-28 15:06:03,946 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 15:06:03,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:06:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 15:06:03,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2020-10-28 15:06:03,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 15:06:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-28 15:06:03,957 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-10-28 15:06:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:03,957 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-28 15:06:03,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:06:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-28 15:06:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:06:03,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:03,958 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:03,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:06:03,959 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:03,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:03,959 INFO L82 PathProgramCache]: Analyzing trace with hash 845817524, now seen corresponding path program 7 times [2020-10-28 15:06:03,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:03,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672446414] [2020-10-28 15:06:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:03,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:04,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:04,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:04,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:06:04,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:04,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-28 15:06:04,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:04,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:04,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:06:04,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:04,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:06:04,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:04,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:04,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:04,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:04,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:04,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:04,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:04,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:04,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:04,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:04,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:04,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:04,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:06:04,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672446414] [2020-10-28 15:06:04,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:04,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:06:04,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174711318] [2020-10-28 15:06:04,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:06:04,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:04,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:06:04,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:06:04,532 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2020-10-28 15:06:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:04,893 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-28 15:06:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:06:04,893 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-28 15:06:04,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:04,894 INFO L225 Difference]: With dead ends: 43 [2020-10-28 15:06:04,894 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 15:06:04,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:06:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 15:06:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 15:06:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 15:06:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-28 15:06:04,904 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-28 15:06:04,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:04,904 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-28 15:06:04,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:06:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-28 15:06:04,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:06:04,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:04,905 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:04,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:06:04,905 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:04,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:04,906 INFO L82 PathProgramCache]: Analyzing trace with hash 480648821, now seen corresponding path program 8 times [2020-10-28 15:06:04,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:04,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869966145] [2020-10-28 15:06:04,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:04,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:04,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:05,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:05,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:06:05,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:05,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-10-28 15:06:05,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:05,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:05,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:06:05,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:05,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:06:05,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:05,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:05,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:05,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:05,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:05,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:05,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:05,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:05,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:05,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:05,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:05,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:05,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:06:05,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869966145] [2020-10-28 15:06:05,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:05,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:06:05,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743258408] [2020-10-28 15:06:05,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:06:05,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:05,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:06:05,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:06:05,796 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 10 states. [2020-10-28 15:06:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:06,244 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-28 15:06:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:06:06,245 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-28 15:06:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:06,246 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:06:06,246 INFO L226 Difference]: Without dead ends: 34 [2020-10-28 15:06:06,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:06:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-28 15:06:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-28 15:06:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:06:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-28 15:06:06,255 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 23 [2020-10-28 15:06:06,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:06,255 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-28 15:06:06,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:06:06,256 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-28 15:06:06,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-28 15:06:06,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:06,256 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:06,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:06:06,257 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:06,258 INFO L82 PathProgramCache]: Analyzing trace with hash 68205142, now seen corresponding path program 9 times [2020-10-28 15:06:06,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:06,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384902369] [2020-10-28 15:06:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:06,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:06,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:06,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:07,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:07,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 15:06:07,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:06:07,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1075 [2020-10-28 15:06:07,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:07,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:07,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:06:07,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:07,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:06:07,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:07,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:07,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:07,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:07,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:07,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:07,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:07,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:07,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:07,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:07,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:07,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:07,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:06:07,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384902369] [2020-10-28 15:06:07,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:07,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:06:07,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316920360] [2020-10-28 15:06:07,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:06:07,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:07,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:06:07,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:06:07,491 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 10 states. [2020-10-28 15:06:07,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:07,991 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-28 15:06:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:06:07,992 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-28 15:06:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:07,993 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:06:07,993 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 15:06:07,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:06:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 15:06:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-28 15:06:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 15:06:08,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-28 15:06:08,011 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 23 [2020-10-28 15:06:08,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:08,011 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-28 15:06:08,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:06:08,011 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-28 15:06:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:06:08,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:08,014 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:08,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:06:08,015 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:08,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2045320916, now seen corresponding path program 10 times [2020-10-28 15:06:08,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:08,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400241799] [2020-10-28 15:06:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:08,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:08,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:08,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:06:08,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:08,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-28 15:06:08,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:08,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:08,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:06:08,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 15:06:08,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:06:08,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:08,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:08,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:08,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:08,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:08,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:08,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:08,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:08,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:08,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:08,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:08,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:08,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:06:08,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400241799] [2020-10-28 15:06:08,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:08,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:06:08,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846745780] [2020-10-28 15:06:08,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:06:08,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:08,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:06:08,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:06:08,433 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 9 states. [2020-10-28 15:06:08,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:08,822 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2020-10-28 15:06:08,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:06:08,822 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-28 15:06:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:08,823 INFO L225 Difference]: With dead ends: 71 [2020-10-28 15:06:08,823 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 15:06:08,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:06:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 15:06:08,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2020-10-28 15:06:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:06:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-10-28 15:06:08,849 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 24 [2020-10-28 15:06:08,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:08,851 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-10-28 15:06:08,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:06:08,851 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-10-28 15:06:08,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:06:08,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:08,854 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:08,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:06:08,854 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:08,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1732025076, now seen corresponding path program 11 times [2020-10-28 15:06:08,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:08,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552860326] [2020-10-28 15:06:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:08,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:08,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:10,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:10,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:06:10,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:06:10,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1297 [2020-10-28 15:06:10,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:10,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:10,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:06:10,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 15:06:10,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:06:10,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:10,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:10,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:10,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:10,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:10,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:10,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:10,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:10,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:10,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:10,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:10,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:10,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 15:06:10,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552860326] [2020-10-28 15:06:10,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:10,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:06:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354401759] [2020-10-28 15:06:10,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:06:10,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:10,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:06:10,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:06:10,291 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 7 states. [2020-10-28 15:06:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:10,611 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-28 15:06:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:06:10,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-28 15:06:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:10,613 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:06:10,613 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 15:06:10,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 15:06:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-28 15:06:10,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:06:10,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-28 15:06:10,627 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 24 [2020-10-28 15:06:10,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:10,627 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-28 15:06:10,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:06:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-28 15:06:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:06:10,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:10,628 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:10,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:06:10,629 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:10,629 INFO L82 PathProgramCache]: Analyzing trace with hash -989451691, now seen corresponding path program 12 times [2020-10-28 15:06:10,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:10,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107172807] [2020-10-28 15:06:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:10,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:10,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:11,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:11,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:06:11,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:11,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1101 [2020-10-28 15:06:11,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:11,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:11,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:06:11,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:06:11,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:06:11,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:11,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:11,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:11,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:11,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:11,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:11,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:11,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:11,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:11,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:11,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:11,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:11,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:06:11,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107172807] [2020-10-28 15:06:11,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:11,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:06:11,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810842846] [2020-10-28 15:06:11,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:06:11,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:11,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:06:11,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:11,936 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 11 states. [2020-10-28 15:06:13,171 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-28 15:06:15,331 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 56 [2020-10-28 15:06:16,817 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-28 15:06:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:17,143 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-10-28 15:06:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:06:17,144 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-28 15:06:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:17,145 INFO L225 Difference]: With dead ends: 70 [2020-10-28 15:06:17,145 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 15:06:17,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:06:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 15:06:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2020-10-28 15:06:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:06:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-28 15:06:17,156 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 25 [2020-10-28 15:06:17,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:17,156 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-28 15:06:17,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:06:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-28 15:06:17,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 15:06:17,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:17,157 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:17,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:06:17,158 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:17,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:17,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1171608825, now seen corresponding path program 13 times [2020-10-28 15:06:17,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:17,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985878152] [2020-10-28 15:06:17,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:17,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:17,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 15:06:17,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:17,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-10-28 15:06:17,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:17,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:17,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:06:17,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:17,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:06:17,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:18,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:18,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:18,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:18,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:18,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:18,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:18,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:18,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:18,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:18,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:18,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 15:06:18,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985878152] [2020-10-28 15:06:18,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:18,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:06:18,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687444684] [2020-10-28 15:06:18,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:06:18,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:18,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:06:18,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:18,125 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 11 states. [2020-10-28 15:06:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:18,653 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-28 15:06:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:06:18,654 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-28 15:06:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:18,654 INFO L225 Difference]: With dead ends: 49 [2020-10-28 15:06:18,654 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 15:06:18,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:06:18,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 15:06:18,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-28 15:06:18,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:06:18,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-28 15:06:18,665 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 25 [2020-10-28 15:06:18,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:18,665 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-28 15:06:18,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:06:18,665 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-28 15:06:18,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:06:18,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:18,666 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:18,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:06:18,666 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:18,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:18,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1252897924, now seen corresponding path program 14 times [2020-10-28 15:06:18,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:18,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232031878] [2020-10-28 15:06:18,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:18,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:19,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:19,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:06:19,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:19,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1056 [2020-10-28 15:06:19,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:19,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:19,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:06:19,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:19,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:06:19,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:19,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:19,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:19,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:19,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:19,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:19,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:19,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:19,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:19,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 15:06:19,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232031878] [2020-10-28 15:06:19,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:19,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:06:19,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803436215] [2020-10-28 15:06:19,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:06:19,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:19,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:06:19,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:06:19,970 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 12 states. [2020-10-28 15:06:20,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:20,665 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-28 15:06:20,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:06:20,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-28 15:06:20,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:20,668 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:06:20,668 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 15:06:20,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:06:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 15:06:20,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-28 15:06:20,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 15:06:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-28 15:06:20,680 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2020-10-28 15:06:20,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:20,680 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-28 15:06:20,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:06:20,680 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-28 15:06:20,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:06:20,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:20,681 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:20,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:06:20,681 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:20,682 INFO L82 PathProgramCache]: Analyzing trace with hash 31513637, now seen corresponding path program 15 times [2020-10-28 15:06:20,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:20,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366847702] [2020-10-28 15:06:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:20,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:20,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:20,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:22,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:06:22,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:06:22,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1734 [2020-10-28 15:06:22,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:22,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:22,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:06:22,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:22,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:22,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:22,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:22,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:22,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:22,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:22,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:22,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:22,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:22,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:22,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 15:06:22,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366847702] [2020-10-28 15:06:22,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:22,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:06:22,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110205409] [2020-10-28 15:06:22,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:06:22,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:22,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:06:22,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:06:22,615 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 10 states. [2020-10-28 15:06:23,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:23,157 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-28 15:06:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:06:23,160 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 15:06:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:23,161 INFO L225 Difference]: With dead ends: 63 [2020-10-28 15:06:23,161 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 15:06:23,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:06:23,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 15:06:23,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2020-10-28 15:06:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 15:06:23,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-28 15:06:23,182 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 26 [2020-10-28 15:06:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:23,182 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-28 15:06:23,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:06:23,183 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-28 15:06:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:06:23,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:23,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:23,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:06:23,184 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:23,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:23,184 INFO L82 PathProgramCache]: Analyzing trace with hash -896804185, now seen corresponding path program 16 times [2020-10-28 15:06:23,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:23,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337558855] [2020-10-28 15:06:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:23,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:23,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:23,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:06:23,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:23,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-28 15:06:23,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:23,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:23,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:06:23,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 15:06:23,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:06:23,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:23,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:23,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:23,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:23,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:23,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:23,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:23,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:23,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:23,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:23,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:23,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:23,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 15:06:23,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337558855] [2020-10-28 15:06:23,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:23,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:06:23,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582526766] [2020-10-28 15:06:23,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:06:23,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:23,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:06:23,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:06:23,755 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 10 states. [2020-10-28 15:06:24,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:24,307 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2020-10-28 15:06:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:06:24,309 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-28 15:06:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:24,310 INFO L225 Difference]: With dead ends: 86 [2020-10-28 15:06:24,310 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 15:06:24,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:06:24,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 15:06:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 49. [2020-10-28 15:06:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:06:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-10-28 15:06:24,328 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 27 [2020-10-28 15:06:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:24,328 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-10-28 15:06:24,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:06:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-10-28 15:06:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:06:24,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:24,330 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:24,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:06:24,331 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2046259253, now seen corresponding path program 17 times [2020-10-28 15:06:24,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:24,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857904801] [2020-10-28 15:06:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:24,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:24,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:25,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:25,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:06:25,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:25,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-10-28 15:06:25,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:25,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:25,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:06:25,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:25,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:06:25,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:25,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:25,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:25,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:25,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:25,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:25,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:25,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:25,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:25,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:25,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:25,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:25,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 15:06:25,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857904801] [2020-10-28 15:06:25,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:25,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:06:25,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183065569] [2020-10-28 15:06:25,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:06:25,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:25,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:06:25,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:06:25,804 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 12 states. [2020-10-28 15:06:26,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:26,603 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-28 15:06:26,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:06:26,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-28 15:06:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:26,605 INFO L225 Difference]: With dead ends: 63 [2020-10-28 15:06:26,605 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 15:06:26,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:06:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 15:06:26,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-28 15:06:26,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 15:06:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-10-28 15:06:26,632 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 27 [2020-10-28 15:06:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:26,632 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-10-28 15:06:26,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:06:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-10-28 15:06:26,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:06:26,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:26,633 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:26,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:06:26,636 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:26,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1326395705, now seen corresponding path program 18 times [2020-10-28 15:06:26,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:26,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417891708] [2020-10-28 15:06:26,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:26,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:26,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:27,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:28,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:06:28,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:06:28,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1898 [2020-10-28 15:06:28,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:28,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:28,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:28,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:28,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:06:28,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:28,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:28,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:28,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:28,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:28,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:28,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:28,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:28,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:28,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:28,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:28,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 15:06:28,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417891708] [2020-10-28 15:06:28,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:28,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:28,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867370991] [2020-10-28 15:06:28,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:28,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:28,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:28,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:28,763 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 13 states. [2020-10-28 15:06:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:29,755 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2020-10-28 15:06:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:06:29,755 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-28 15:06:29,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:29,756 INFO L225 Difference]: With dead ends: 82 [2020-10-28 15:06:29,757 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 15:06:29,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:06:29,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 15:06:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-10-28 15:06:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 15:06:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-10-28 15:06:29,776 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 27 [2020-10-28 15:06:29,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:29,776 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-10-28 15:06:29,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-10-28 15:06:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:06:29,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:29,777 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:29,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:06:29,777 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:29,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1181907172, now seen corresponding path program 19 times [2020-10-28 15:06:29,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:29,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345838896] [2020-10-28 15:06:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:29,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:29,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:31,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:31,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:06:31,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:31,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1535 [2020-10-28 15:06:31,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:31,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:31,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:31,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:31,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:06:31,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:31,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:31,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:31,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:31,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:31,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:31,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:06:31,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:31,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:31,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:31,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:31,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:31,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 15:06:31,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345838896] [2020-10-28 15:06:31,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:31,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:31,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150286249] [2020-10-28 15:06:31,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:31,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:31,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:31,571 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 13 states. [2020-10-28 15:06:32,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:32,246 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-10-28 15:06:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:06:32,247 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-28 15:06:32,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:32,248 INFO L225 Difference]: With dead ends: 68 [2020-10-28 15:06:32,248 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 15:06:32,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:06:32,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 15:06:32,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-28 15:06:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 15:06:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-10-28 15:06:32,260 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 28 [2020-10-28 15:06:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:32,261 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-10-28 15:06:32,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-10-28 15:06:32,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:06:32,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:32,261 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:32,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:06:32,262 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:32,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:32,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2108949844, now seen corresponding path program 20 times [2020-10-28 15:06:32,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:32,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508648529] [2020-10-28 15:06:32,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:32,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:32,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:33,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:33,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:06:33,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:33,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1400 [2020-10-28 15:06:33,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:33,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:33,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:06:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 15:06:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:33,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:33,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:33,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:33,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:33,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:33,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:33,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:33,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:33,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:33,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 15:06:33,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508648529] [2020-10-28 15:06:33,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:33,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:33,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758087274] [2020-10-28 15:06:33,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:33,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:33,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:33,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:33,905 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 13 states. [2020-10-28 15:06:34,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:34,689 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-10-28 15:06:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:06:34,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-28 15:06:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:34,690 INFO L225 Difference]: With dead ends: 70 [2020-10-28 15:06:34,690 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 15:06:34,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:06:34,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 15:06:34,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-10-28 15:06:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 15:06:34,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-28 15:06:34,709 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 28 [2020-10-28 15:06:34,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:34,710 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-28 15:06:34,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-28 15:06:34,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:06:34,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:34,710 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:34,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:06:34,711 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:34,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:34,711 INFO L82 PathProgramCache]: Analyzing trace with hash -471912347, now seen corresponding path program 21 times [2020-10-28 15:06:34,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:34,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521891547] [2020-10-28 15:06:34,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:34,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:34,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:35,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:36,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:36,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:06:36,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:06:36,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1825 [2020-10-28 15:06:36,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:36,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:36,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:06:36,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 15:06:36,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:06:36,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:36,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:36,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:36,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:36,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:36,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:36,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:36,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:36,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:36,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:36,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:36,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:36,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-28 15:06:36,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521891547] [2020-10-28 15:06:36,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:36,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:06:36,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965558973] [2020-10-28 15:06:36,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:06:36,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:36,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:06:36,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:06:36,703 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 9 states. [2020-10-28 15:06:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:37,286 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-28 15:06:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:06:37,287 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-28 15:06:37,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:37,287 INFO L225 Difference]: With dead ends: 62 [2020-10-28 15:06:37,288 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 15:06:37,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:06:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 15:06:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 15:06:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 15:06:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-10-28 15:06:37,302 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 28 [2020-10-28 15:06:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:37,302 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-10-28 15:06:37,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:06:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-10-28 15:06:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:06:37,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:37,303 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:37,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:06:37,303 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:37,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:37,303 INFO L82 PathProgramCache]: Analyzing trace with hash -242609131, now seen corresponding path program 22 times [2020-10-28 15:06:37,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:37,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867624631] [2020-10-28 15:06:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:37,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:37,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:38,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:06:38,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:38,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1259 [2020-10-28 15:06:38,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:38,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:38,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:06:38,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:38,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:06:38,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:38,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:38,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:38,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:38,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:38,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:38,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:38,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:38,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:38,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:38,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:38,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 15:06:38,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867624631] [2020-10-28 15:06:38,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:38,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:06:38,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832010300] [2020-10-28 15:06:38,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:06:38,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:38,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:06:38,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:06:38,844 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 14 states. [2020-10-28 15:06:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:39,760 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2020-10-28 15:06:39,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:06:39,760 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-28 15:06:39,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:39,761 INFO L225 Difference]: With dead ends: 71 [2020-10-28 15:06:39,761 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 15:06:39,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:06:39,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 15:06:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-10-28 15:06:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 15:06:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-28 15:06:39,777 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 29 [2020-10-28 15:06:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:39,778 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-28 15:06:39,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:06:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-28 15:06:39,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 15:06:39,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:39,779 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:39,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:06:39,779 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:39,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:39,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1468652262, now seen corresponding path program 23 times [2020-10-28 15:06:39,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:39,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179823581] [2020-10-28 15:06:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:39,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:39,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:39,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:39,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:41,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:41,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 15:06:41,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:06:41,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1778 [2020-10-28 15:06:41,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:41,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:41,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:06:41,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:41,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:06:41,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:41,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:41,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:41,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:41,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:41,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:41,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:41,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:41,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:41,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:41,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:41,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:41,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:06:41,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179823581] [2020-10-28 15:06:41,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:41,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:06:41,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926854729] [2020-10-28 15:06:41,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:06:41,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:41,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:06:41,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:06:41,778 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 12 states. [2020-10-28 15:06:42,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:42,520 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2020-10-28 15:06:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:06:42,521 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-28 15:06:42,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:42,523 INFO L225 Difference]: With dead ends: 91 [2020-10-28 15:06:42,523 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 15:06:42,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:06:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 15:06:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 59. [2020-10-28 15:06:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 15:06:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-10-28 15:06:42,543 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 29 [2020-10-28 15:06:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:42,544 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-10-28 15:06:42,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:06:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-10-28 15:06:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:06:42,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:42,545 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:42,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:06:42,545 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash -126493324, now seen corresponding path program 24 times [2020-10-28 15:06:42,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:42,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510688764] [2020-10-28 15:06:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:42,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:42,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:42,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:06:42,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:42,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-28 15:06:42,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:42,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:06:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 15:06:42,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:06:42,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:43,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:43,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:43,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:43,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:43,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:43,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:43,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:43,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:43,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:43,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:43,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:43,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 15:06:43,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510688764] [2020-10-28 15:06:43,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:43,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:06:43,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757460187] [2020-10-28 15:06:43,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:06:43,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:43,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:06:43,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:43,032 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 11 states. [2020-10-28 15:06:43,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:43,677 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2020-10-28 15:06:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:06:43,678 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-28 15:06:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:43,679 INFO L225 Difference]: With dead ends: 111 [2020-10-28 15:06:43,680 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 15:06:43,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:06:43,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 15:06:43,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2020-10-28 15:06:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 15:06:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-10-28 15:06:43,695 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 30 [2020-10-28 15:06:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:43,695 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-10-28 15:06:43,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:06:43,695 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-10-28 15:06:43,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:06:43,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:43,695 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:43,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:06:43,696 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:43,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1452941564, now seen corresponding path program 25 times [2020-10-28 15:06:43,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:43,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746145154] [2020-10-28 15:06:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:43,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:43,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:44,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:44,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:06:44,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:44,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1038 [2020-10-28 15:06:44,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:44,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:44,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:06:44,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:44,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:06:44,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:44,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:44,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:44,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:44,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:44,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:44,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:44,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:44,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:44,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 15:06:45,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746145154] [2020-10-28 15:06:45,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:45,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:06:45,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521836135] [2020-10-28 15:06:45,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:06:45,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:45,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:06:45,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:06:45,005 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 14 states. [2020-10-28 15:06:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:46,054 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-10-28 15:06:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:06:46,055 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-28 15:06:46,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:46,056 INFO L225 Difference]: With dead ends: 88 [2020-10-28 15:06:46,056 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 15:06:46,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:06:46,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 15:06:46,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-10-28 15:06:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:06:46,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-10-28 15:06:46,077 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 30 [2020-10-28 15:06:46,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:46,077 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-10-28 15:06:46,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:06:46,077 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-10-28 15:06:46,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:06:46,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:46,078 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:46,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:06:46,078 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:46,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:46,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2006561532, now seen corresponding path program 26 times [2020-10-28 15:06:46,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:46,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171911889] [2020-10-28 15:06:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:46,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:46,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:46,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:48,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:48,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:06:48,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:06:48,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2318 [2020-10-28 15:06:48,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:48,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:48,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:06:48,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:48,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:06:48,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:48,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:48,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:48,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:48,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:48,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:48,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:06:48,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:48,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:48,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:48,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:48,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:06:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 15:06:48,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171911889] [2020-10-28 15:06:48,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:48,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:06:48,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822667101] [2020-10-28 15:06:48,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:06:48,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:48,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:06:48,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:06:48,710 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 13 states. [2020-10-28 15:06:49,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:49,624 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-10-28 15:06:49,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:06:49,625 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-28 15:06:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:49,626 INFO L225 Difference]: With dead ends: 116 [2020-10-28 15:06:49,626 INFO L226 Difference]: Without dead ends: 109 [2020-10-28 15:06:49,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:06:49,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-28 15:06:49,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2020-10-28 15:06:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-28 15:06:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2020-10-28 15:06:49,649 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 30 [2020-10-28 15:06:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:49,650 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2020-10-28 15:06:49,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:06:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2020-10-28 15:06:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:06:49,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:49,651 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:49,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:06:49,651 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:49,651 INFO L82 PathProgramCache]: Analyzing trace with hash -821870603, now seen corresponding path program 27 times [2020-10-28 15:06:49,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:49,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217269205] [2020-10-28 15:06:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:49,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:49,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:51,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:06:51,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:51,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2027 [2020-10-28 15:06:51,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:51,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:51,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:06:51,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:51,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:06:51,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:51,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:51,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:51,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:51,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:51,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:51,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:51,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:51,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:51,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:51,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:51,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 15:06:51,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217269205] [2020-10-28 15:06:51,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:51,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:06:51,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454463130] [2020-10-28 15:06:51,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:06:51,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:51,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:06:51,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:06:51,982 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 15 states. [2020-10-28 15:06:53,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:53,034 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2020-10-28 15:06:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:06:53,034 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-28 15:06:53,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:53,035 INFO L225 Difference]: With dead ends: 86 [2020-10-28 15:06:53,035 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 15:06:53,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:06:53,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 15:06:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-28 15:06:53,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 15:06:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-10-28 15:06:53,059 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 31 [2020-10-28 15:06:53,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:53,059 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-10-28 15:06:53,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:06:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-10-28 15:06:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:06:53,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:53,060 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:53,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:06:53,060 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:53,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:53,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1780942823, now seen corresponding path program 28 times [2020-10-28 15:06:53,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:53,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340878817] [2020-10-28 15:06:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:53,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:53,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:54,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:54,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:06:54,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:06:54,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1494 [2020-10-28 15:06:54,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:54,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:54,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:06:54,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:06:54,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 15:06:54,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:54,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:54,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:54,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:54,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:54,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:54,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:54,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:54,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:54,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:54,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:54,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:54,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 15:06:54,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340878817] [2020-10-28 15:06:54,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:54,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:06:54,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121894767] [2020-10-28 15:06:54,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:06:54,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:54,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:06:54,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:06:54,881 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 15 states. [2020-10-28 15:06:55,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:55,881 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-10-28 15:06:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:06:55,882 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-28 15:06:55,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:55,883 INFO L225 Difference]: With dead ends: 88 [2020-10-28 15:06:55,883 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 15:06:55,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:06:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 15:06:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-10-28 15:06:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:06:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-10-28 15:06:55,904 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 31 [2020-10-28 15:06:55,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:55,904 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-10-28 15:06:55,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:06:55,905 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-10-28 15:06:55,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 15:06:55,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:55,905 INFO L422 BasicCegarLoop]: trace histogram [9, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:55,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:06:55,905 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:55,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:55,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1930960550, now seen corresponding path program 29 times [2020-10-28 15:06:55,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:55,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404882023] [2020-10-28 15:06:55,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:55,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:56,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:56,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:58,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:58,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 15:06:58,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:06:58,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2806 [2020-10-28 15:06:58,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:58,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:58,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:06:58,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 15:06:58,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:06:58,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:58,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:58,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:58,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:58,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:58,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:58,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:58,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:58,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:58,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:58,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:58,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-28 15:06:58,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404882023] [2020-10-28 15:06:58,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:58,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:06:58,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499767290] [2020-10-28 15:06:58,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:06:58,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:58,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:06:58,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:06:58,956 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 11 states. [2020-10-28 15:06:59,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:59,798 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2020-10-28 15:06:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:06:59,800 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-28 15:06:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:59,800 INFO L225 Difference]: With dead ends: 93 [2020-10-28 15:06:59,801 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 15:06:59,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:06:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 15:06:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-28 15:06:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 15:06:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2020-10-28 15:06:59,821 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 31 [2020-10-28 15:06:59,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:59,822 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2020-10-28 15:06:59,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:06:59,822 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2020-10-28 15:06:59,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:06:59,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:59,822 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:59,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:06:59,823 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:59,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1047856284, now seen corresponding path program 30 times [2020-10-28 15:06:59,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:59,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115157843] [2020-10-28 15:06:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:59,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:59,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:01,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:01,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:07:01,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:01,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1891 [2020-10-28 15:07:01,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:01,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:01,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:07:01,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:01,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:07:01,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:02,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:02,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:02,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:02,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:02,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:02,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:02,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:02,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:02,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:02,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:02,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 15:07:02,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115157843] [2020-10-28 15:07:02,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:02,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:07:02,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379751001] [2020-10-28 15:07:02,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:07:02,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:02,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:07:02,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:07:02,070 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 16 states. [2020-10-28 15:07:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:03,200 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-10-28 15:07:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:07:03,201 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-28 15:07:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:03,202 INFO L225 Difference]: With dead ends: 91 [2020-10-28 15:07:03,202 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 15:07:03,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:07:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 15:07:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2020-10-28 15:07:03,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-28 15:07:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-10-28 15:07:03,224 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 32 [2020-10-28 15:07:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:03,224 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-10-28 15:07:03,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:07:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-10-28 15:07:03,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:07:03,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:03,225 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:03,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:07:03,225 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:03,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:03,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1453684615, now seen corresponding path program 31 times [2020-10-28 15:07:03,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:03,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261193464] [2020-10-28 15:07:03,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:03,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:03,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:07:03,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:03,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-28 15:07:03,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:03,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:03,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:07:03,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 15:07:03,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:07:03,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:03,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:03,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:03,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:03,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:03,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:03,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:03,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:03,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:03,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:03,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:03,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 15:07:03,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261193464] [2020-10-28 15:07:03,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:03,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:07:03,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101604974] [2020-10-28 15:07:03,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:07:03,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:03,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:07:03,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:07:03,992 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 12 states. [2020-10-28 15:07:04,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:04,829 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2020-10-28 15:07:04,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:07:04,830 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-28 15:07:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:04,831 INFO L225 Difference]: With dead ends: 129 [2020-10-28 15:07:04,831 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 15:07:04,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:07:04,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 15:07:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 77. [2020-10-28 15:07:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-28 15:07:04,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-10-28 15:07:04,851 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 33 [2020-10-28 15:07:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:04,852 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-10-28 15:07:04,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:07:04,852 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-10-28 15:07:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:07:04,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:04,853 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:04,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 15:07:04,853 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:04,853 INFO L82 PathProgramCache]: Analyzing trace with hash 536522197, now seen corresponding path program 32 times [2020-10-28 15:07:04,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:04,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693069091] [2020-10-28 15:07:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:04,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:04,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:06,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:06,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:07:06,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:06,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1974 [2020-10-28 15:07:06,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:06,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:06,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:07:06,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:06,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:07:06,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:07,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:07,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:07,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:07,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:07,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:07,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:07,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:07,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:07,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:07,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:07,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:07,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 15:07:07,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693069091] [2020-10-28 15:07:07,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:07,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:07:07,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462367454] [2020-10-28 15:07:07,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:07:07,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:07,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:07:07,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:07:07,193 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 16 states. [2020-10-28 15:07:08,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:08,590 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2020-10-28 15:07:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:07:08,591 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-28 15:07:08,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:08,592 INFO L225 Difference]: With dead ends: 101 [2020-10-28 15:07:08,592 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 15:07:08,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:07:08,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 15:07:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2020-10-28 15:07:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 15:07:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-10-28 15:07:08,615 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 33 [2020-10-28 15:07:08,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:08,616 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-10-28 15:07:08,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:07:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-10-28 15:07:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 15:07:08,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:08,616 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:08,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 15:07:08,617 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:08,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2116332437, now seen corresponding path program 33 times [2020-10-28 15:07:08,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:08,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142852146] [2020-10-28 15:07:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:08,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:08,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:08,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:12,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:12,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 15:07:12,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:07:12,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3842 [2020-10-28 15:07:12,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:12,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:12,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:07:12,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:12,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:07:12,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:12,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:12,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:12,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:12,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:12,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:12,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:07:12,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:12,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:12,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:12,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 15:07:12,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142852146] [2020-10-28 15:07:12,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:12,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:07:12,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990074575] [2020-10-28 15:07:12,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:07:12,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:12,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:07:12,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:07:12,756 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 14 states. [2020-10-28 15:07:13,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:13,770 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2020-10-28 15:07:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:07:13,771 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-10-28 15:07:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:13,772 INFO L225 Difference]: With dead ends: 138 [2020-10-28 15:07:13,772 INFO L226 Difference]: Without dead ends: 131 [2020-10-28 15:07:13,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:07:13,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-28 15:07:13,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 86. [2020-10-28 15:07:13,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 15:07:13,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-10-28 15:07:13,799 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 33 [2020-10-28 15:07:13,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:13,800 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-10-28 15:07:13,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:07:13,800 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-10-28 15:07:13,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:07:13,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:13,800 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:13,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 15:07:13,801 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:13,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:13,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1692041156, now seen corresponding path program 34 times [2020-10-28 15:07:13,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:13,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298476226] [2020-10-28 15:07:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:13,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:13,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:16,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:16,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:07:16,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:16,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2523 [2020-10-28 15:07:16,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:16,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:16,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:07:16,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 15:07:16,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:07:16,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:16,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:16,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:16,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:16,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:16,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:16,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:16,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:16,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:16,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:16,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 15:07:16,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298476226] [2020-10-28 15:07:16,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:16,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:07:16,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899588511] [2020-10-28 15:07:16,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:07:16,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:16,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:07:16,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:07:16,740 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 17 states. [2020-10-28 15:07:21,812 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification that was a NOOP. DAG size: 74 [2020-10-28 15:07:24,659 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 15:07:25,531 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 15:07:27,535 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 77 [2020-10-28 15:07:29,604 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 6)) 4294967296)) 4294967300)) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 4)) 4294967296)) 4294967298)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 2)) 4294967296)) 4294967296)) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 7)) 4294967296)) 4294967301)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 5)) 4294967296)) 4294967299)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0)) is different from false [2020-10-28 15:07:32,980 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 77 [2020-10-28 15:07:35,412 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-28 15:07:36,007 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 15:07:36,482 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 15:07:36,795 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 15:07:37,220 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 15:07:39,557 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~z~0 1))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 4)) 4294967296)) 4294967298)) (<= .cse0 c_main_~y~0) (<= c_main_~y~0 .cse0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0))) is different from false [2020-10-28 15:07:40,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:40,276 INFO L93 Difference]: Finished difference Result 204 states and 241 transitions. [2020-10-28 15:07:40,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:07:40,277 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-28 15:07:40,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:40,279 INFO L225 Difference]: With dead ends: 204 [2020-10-28 15:07:40,279 INFO L226 Difference]: Without dead ends: 191 [2020-10-28 15:07:40,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=294, Invalid=1433, Unknown=3, NotChecked=162, Total=1892 [2020-10-28 15:07:40,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-28 15:07:40,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 86. [2020-10-28 15:07:40,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 15:07:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2020-10-28 15:07:40,305 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 34 [2020-10-28 15:07:40,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:40,306 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2020-10-28 15:07:40,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:07:40,306 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2020-10-28 15:07:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:07:40,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:40,306 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:40,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-28 15:07:40,307 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:40,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:40,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1519086580, now seen corresponding path program 35 times [2020-10-28 15:07:40,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:40,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099427089] [2020-10-28 15:07:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:40,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:40,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:42,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:07:42,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:42,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2134 [2020-10-28 15:07:42,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:42,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:42,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:07:42,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:07:42,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:07:42,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:42,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:42,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:42,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:42,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:42,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:42,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:42,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:42,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:42,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:42,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:42,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 15:07:42,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099427089] [2020-10-28 15:07:42,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:42,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:07:42,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302196926] [2020-10-28 15:07:42,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:07:42,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:42,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:07:42,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:07:42,826 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand 17 states. [2020-10-28 15:07:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:44,403 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2020-10-28 15:07:44,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:07:44,404 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-28 15:07:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:44,405 INFO L225 Difference]: With dead ends: 110 [2020-10-28 15:07:44,405 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 15:07:44,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 15:07:44,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 15:07:44,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2020-10-28 15:07:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 15:07:44,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-10-28 15:07:44,433 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 34 [2020-10-28 15:07:44,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:44,434 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-10-28 15:07:44,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:07:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-10-28 15:07:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:07:44,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:44,435 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:44,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-28 15:07:44,435 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:44,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:44,435 INFO L82 PathProgramCache]: Analyzing trace with hash 491159335, now seen corresponding path program 36 times [2020-10-28 15:07:44,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:44,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322494038] [2020-10-28 15:07:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:44,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:44,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:47,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:47,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:07:47,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:07:47,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3409 [2020-10-28 15:07:47,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:47,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:47,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:07:47,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 15:07:47,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:07:47,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:48,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:48,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:48,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:48,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:48,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:48,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:48,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:48,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:48,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:48,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:48,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:48,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 15:07:48,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322494038] [2020-10-28 15:07:48,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:48,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:07:48,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929996346] [2020-10-28 15:07:48,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:07:48,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:48,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:07:48,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:07:48,290 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 17 states. [2020-10-28 15:07:54,140 WARN L193 SmtUtils]: Spent 4.79 s on a formula simplification that was a NOOP. DAG size: 74 [2020-10-28 15:07:55,238 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 15:07:59,050 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 15:07:59,965 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 15:08:02,382 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-28 15:08:06,070 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 79 [2020-10-28 15:08:08,148 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~z~0 4))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= c_main_~y~0 .cse0) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 6)) 4294967296)) 4294967300)) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 4)) 4294967296)) 4294967298)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 2)) 4294967296)) 4294967296)) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 7)) 4294967296)) 4294967301)) (<= .cse0 c_main_~y~0) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0))) is different from false [2020-10-28 15:08:11,671 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-28 15:08:14,895 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-28 15:08:18,440 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 15:08:26,902 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 72 [2020-10-28 15:08:29,466 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~z~0 3))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (<= .cse0 c_main_~y~0) (= |c_old(#valid)| |c_#valid|) (<= c_main_~y~0 .cse0) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 2)) 4294967296)) 4294967296)) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 5)) 4294967296)) 4294967299)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0))) is different from false [2020-10-28 15:08:30,115 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 15:08:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:33,386 INFO L93 Difference]: Finished difference Result 184 states and 209 transitions. [2020-10-28 15:08:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 15:08:33,387 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-28 15:08:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:33,388 INFO L225 Difference]: With dead ends: 184 [2020-10-28 15:08:33,388 INFO L226 Difference]: Without dead ends: 161 [2020-10-28 15:08:33,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=377, Invalid=1694, Unknown=7, NotChecked=178, Total=2256 [2020-10-28 15:08:33,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-28 15:08:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 67. [2020-10-28 15:08:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:08:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-10-28 15:08:33,413 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 35 [2020-10-28 15:08:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:33,413 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-10-28 15:08:33,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:08:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-10-28 15:08:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:08:33,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:33,414 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:33,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-28 15:08:33,414 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:33,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:33,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1913811381, now seen corresponding path program 37 times [2020-10-28 15:08:33,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:33,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054841673] [2020-10-28 15:08:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:33,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:33,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:36,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:36,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:08:36,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:36,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3257 [2020-10-28 15:08:36,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:36,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:36,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:08:36,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:36,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:08:36,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:37,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:37,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:37,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:37,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:37,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:37,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:08:37,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:37,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:37,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:37,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:37,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:37,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 15:08:37,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054841673] [2020-10-28 15:08:37,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:37,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:08:37,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604646653] [2020-10-28 15:08:37,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:08:37,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:37,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:08:37,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:08:37,073 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 18 states. [2020-10-28 15:08:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:38,370 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2020-10-28 15:08:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:08:38,371 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-10-28 15:08:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:38,372 INFO L225 Difference]: With dead ends: 91 [2020-10-28 15:08:38,372 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 15:08:38,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:08:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 15:08:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-10-28 15:08:38,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 15:08:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-10-28 15:08:38,391 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 35 [2020-10-28 15:08:38,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:38,391 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-10-28 15:08:38,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:08:38,391 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-10-28 15:08:38,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:08:38,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:38,392 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:38,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-28 15:08:38,393 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:38,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:38,393 INFO L82 PathProgramCache]: Analyzing trace with hash -748419801, now seen corresponding path program 38 times [2020-10-28 15:08:38,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:38,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003088233] [2020-10-28 15:08:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:38,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:38,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:40,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:40,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:08:40,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:40,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1787 [2020-10-28 15:08:40,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:40,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:40,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:08:40,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:40,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:08:40,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:40,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:40,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:40,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:40,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:40,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:40,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:08:40,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:40,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:40,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 15:08:40,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003088233] [2020-10-28 15:08:40,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:40,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:08:40,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094920705] [2020-10-28 15:08:40,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:08:40,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:40,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:08:40,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:08:40,576 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 17 states. [2020-10-28 15:08:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:42,127 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-10-28 15:08:42,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:08:42,128 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-28 15:08:42,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:42,129 INFO L225 Difference]: With dead ends: 94 [2020-10-28 15:08:42,129 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 15:08:42,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:08:42,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 15:08:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-10-28 15:08:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 15:08:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-10-28 15:08:42,155 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 35 [2020-10-28 15:08:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:42,155 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-10-28 15:08:42,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:08:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-10-28 15:08:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:08:42,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:42,156 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:42,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-28 15:08:42,156 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:42,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1265378324, now seen corresponding path program 39 times [2020-10-28 15:08:42,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:42,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121307634] [2020-10-28 15:08:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:42,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:42,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:42,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:08:42,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:42,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 490 [2020-10-28 15:08:42,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:42,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:42,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:08:42,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 15:08:42,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:08:42,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:42,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:42,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:42,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:42,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:42,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:42,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:42,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:42,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:42,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:42,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:42,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 15:08:42,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121307634] [2020-10-28 15:08:42,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:42,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:08:42,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224540438] [2020-10-28 15:08:42,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:08:42,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:42,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:08:42,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:08:42,941 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 13 states. [2020-10-28 15:08:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:43,837 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-10-28 15:08:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:08:43,838 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-28 15:08:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:43,839 INFO L225 Difference]: With dead ends: 155 [2020-10-28 15:08:43,839 INFO L226 Difference]: Without dead ends: 141 [2020-10-28 15:08:43,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:08:43,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-28 15:08:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 75. [2020-10-28 15:08:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 15:08:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-10-28 15:08:43,865 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 36 [2020-10-28 15:08:43,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:43,866 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-10-28 15:08:43,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:08:43,866 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-10-28 15:08:43,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:08:43,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:43,867 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:43,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-28 15:08:43,867 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash 198753764, now seen corresponding path program 40 times [2020-10-28 15:08:43,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:43,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148336038] [2020-10-28 15:08:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:43,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:43,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:46,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:46,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:08:46,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:08:46,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2606 [2020-10-28 15:08:46,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:46,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:46,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:08:46,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:46,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:08:46,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:46,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:46,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:46,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:46,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:46,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:46,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:46,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:46,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:46,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:46,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:46,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:46,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-28 15:08:46,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148336038] [2020-10-28 15:08:46,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:46,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:08:46,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140525713] [2020-10-28 15:08:46,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:08:46,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:46,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:08:46,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:08:46,914 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 18 states. [2020-10-28 15:08:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:48,734 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2020-10-28 15:08:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:08:48,735 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-28 15:08:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:48,736 INFO L225 Difference]: With dead ends: 101 [2020-10-28 15:08:48,736 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 15:08:48,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 15:08:48,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 15:08:48,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-10-28 15:08:48,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 15:08:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2020-10-28 15:08:48,767 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 36 [2020-10-28 15:08:48,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:48,767 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2020-10-28 15:08:48,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:08:48,767 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2020-10-28 15:08:48,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:08:48,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:48,768 INFO L422 BasicCegarLoop]: trace histogram [10, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:48,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-28 15:08:48,768 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:48,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:48,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1417344307, now seen corresponding path program 41 times [2020-10-28 15:08:48,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:48,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121135139] [2020-10-28 15:08:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:48,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:48,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:49,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:53,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:53,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:08:53,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:08:53,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:08:53,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:53,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:08:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:08:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:08:53,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:54,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:54,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:54,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:54,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:54,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:54,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:08:54,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:54,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:54,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:54,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:54,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:54,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 15:08:54,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121135139] [2020-10-28 15:08:54,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:54,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:08:54,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907310542] [2020-10-28 15:08:54,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:08:54,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:54,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:08:54,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:08:54,239 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand 19 states. [2020-10-28 15:08:56,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:56,518 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2020-10-28 15:08:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:08:56,519 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-10-28 15:08:56,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:56,520 INFO L225 Difference]: With dead ends: 121 [2020-10-28 15:08:56,520 INFO L226 Difference]: Without dead ends: 107 [2020-10-28 15:08:56,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=187, Invalid=1705, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 15:08:56,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-28 15:08:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-28 15:08:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 15:08:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2020-10-28 15:08:56,554 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 36 [2020-10-28 15:08:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:56,554 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2020-10-28 15:08:56,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:08:56,555 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2020-10-28 15:08:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:08:56,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:56,555 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:56,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-28 15:08:56,555 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:56,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1656177259, now seen corresponding path program 42 times [2020-10-28 15:08:56,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:56,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395211239] [2020-10-28 15:08:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:56,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:56,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:00,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:00,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 15:09:00,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:09:00,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4340 [2020-10-28 15:09:00,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:00,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:00,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:09:00,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 15:09:00,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 15:09:00,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:01,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:09:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:09:01,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:09:01,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:09:01,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:09:01,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:09:01,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:09:01,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:09:01,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:09:01,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:09:01,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:09:01,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:09:01,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:09:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 15:09:01,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395211239] [2020-10-28 15:09:01,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:09:01,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:09:01,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831730292] [2020-10-28 15:09:01,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:09:01,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:09:01,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:09:01,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:09:01,434 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 19 states. [2020-10-28 15:09:08,839 WARN L193 SmtUtils]: Spent 4.86 s on a formula simplification that was a NOOP. DAG size: 81 [2020-10-28 15:09:16,981 WARN L193 SmtUtils]: Spent 2.59 s on a formula simplification that was a NOOP. DAG size: 75 [2020-10-28 15:09:19,607 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 15:09:24,104 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification that was a NOOP. DAG size: 61 [2020-10-28 15:09:25,725 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-28 15:09:31,032 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification that was a NOOP. DAG size: 70 [2020-10-28 15:09:37,627 WARN L193 SmtUtils]: Spent 3.50 s on a formula simplification that was a NOOP. DAG size: 77 [2020-10-28 15:09:39,849 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~z~0 7))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= .cse0 c_main_~y~0) (<= c_main_~y~0 .cse0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 6)) 4294967296)) 4294967300)) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 4)) 4294967296)) 4294967298)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 2)) 4294967296)) 4294967296)) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 7)) 4294967296)) 4294967301)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 5)) 4294967296)) 4294967299)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0))) is different from false [2020-10-28 15:09:48,542 WARN L193 SmtUtils]: Spent 4.37 s on a formula simplification that was a NOOP. DAG size: 84