/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:14:04,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:14:04,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:14:04,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:14:04,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:14:04,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:14:04,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:14:04,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:14:04,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:14:04,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:14:04,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:14:04,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:14:04,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:14:04,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:14:04,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:14:04,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:14:04,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:14:04,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:14:04,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:14:04,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:14:04,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:14:04,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:14:04,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:14:04,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:14:04,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:14:04,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:14:04,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:14:04,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:14:04,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:14:04,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:14:04,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:14:04,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:14:04,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:14:04,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:14:04,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:14:04,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:14:04,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:14:04,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:14:04,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:14:04,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:14:04,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:14:04,957 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 [2020-10-27 00:14:05,016 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:14:05,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:14:05,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:14:05,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:14:05,023 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:14:05,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:14:05,023 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:14:05,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:14:05,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:14:05,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:14:05,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:14:05,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:14:05,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:14:05,026 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:14:05,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:14:05,026 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:14:05,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:14:05,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:14:05,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:14:05,027 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:14:05,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:14:05,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:14:05,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:14:05,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:14:05,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:14:05,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:14:05,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:14:05,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:14:05,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:14:05,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:14:05,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:14:05,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:14:05,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:14:05,588 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:14:05,588 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:14:05,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label34.c [2020-10-27 00:14:05,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aec02e847/71d7712794274dcdaebbfb5f8313eb36/FLAG35dcb74cc [2020-10-27 00:14:06,686 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:14:06,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label34.c [2020-10-27 00:14:06,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aec02e847/71d7712794274dcdaebbfb5f8313eb36/FLAG35dcb74cc [2020-10-27 00:14:06,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aec02e847/71d7712794274dcdaebbfb5f8313eb36 [2020-10-27 00:14:06,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:14:06,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:14:06,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:14:06,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:14:06,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:14:06,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:14:06" (1/1) ... [2020-10-27 00:14:06,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f45be95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:06, skipping insertion in model container [2020-10-27 00:14:06,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:14:06" (1/1) ... [2020-10-27 00:14:06,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:14:06,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:14:08,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:14:08,229 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:14:08,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:14:08,773 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:14:08,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:08 WrapperNode [2020-10-27 00:14:08,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:14:08,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:14:08,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:14:08,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:14:08,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:08" (1/1) ... [2020-10-27 00:14:08,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:08" (1/1) ... [2020-10-27 00:14:08,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:08" (1/1) ... [2020-10-27 00:14:08,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:08" (1/1) ... [2020-10-27 00:14:09,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:08" (1/1) ... [2020-10-27 00:14:09,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:08" (1/1) ... [2020-10-27 00:14:09,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:08" (1/1) ... [2020-10-27 00:14:09,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:14:09,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:14:09,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:14:09,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:14:09,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:08" (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 [2020-10-27 00:14:09,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:14:09,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:14:09,227 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:14:09,228 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:14:09,228 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:14:09,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:14:09,229 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:14:09,229 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:14:09,229 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:14:09,229 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:14:09,231 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:14:09,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:14:09,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:14:09,231 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:14:09,231 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:14:09,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:14:09,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:14:09,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:14:09,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:14:09,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:14:09,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:14:19,045 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:14:19,045 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:14:19,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:14:19 BoogieIcfgContainer [2020-10-27 00:14:19,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:14:19,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:14:19,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:14:19,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:14:19,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:14:06" (1/3) ... [2020-10-27 00:14:19,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdc3f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:14:19, skipping insertion in model container [2020-10-27 00:14:19,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:14:08" (2/3) ... [2020-10-27 00:14:19,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdc3f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:14:19, skipping insertion in model container [2020-10-27 00:14:19,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:14:19" (3/3) ... [2020-10-27 00:14:19,060 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label34.c [2020-10-27 00:14:19,074 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:14:19,081 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:14:19,096 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:14:19,132 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:14:19,132 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:14:19,133 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:14:19,133 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:14:19,133 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:14:19,133 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:14:19,133 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:14:19,134 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:14:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:14:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 00:14:19,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:14:19,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:14:19,177 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:14:19,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:14:19,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1141615722, now seen corresponding path program 1 times [2020-10-27 00:14:19,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:14:19,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180449868] [2020-10-27 00:14:19,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:14:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:19,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:20,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:20,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 00:14:20,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:20,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-27 00:14:20,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:20,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:14:20,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:14:20,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 00:14:20,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:14:20,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:14:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:20,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:20,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:20,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:14:20,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:20,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-27 00:14:20,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:20,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:14:20,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:14:20,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:14:20,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:14:20,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180449868] [2020-10-27 00:14:20,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:14:20,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:14:20,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504787789] [2020-10-27 00:14:20,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:14:20,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:14:20,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:14:20,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:14:20,433 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:14:33,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:14:33,782 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 00:14:33,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:14:33,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 00:14:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:14:33,809 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 00:14:33,809 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 00:14:33,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:14:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 00:14:33,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 00:14:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 00:14:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 00:14:33,971 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 26 [2020-10-27 00:14:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:14:33,972 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 00:14:33,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:14:33,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 00:14:33,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 00:14:33,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:14:33,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:14:33,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:14:33,978 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:14:33,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:14:33,979 INFO L82 PathProgramCache]: Analyzing trace with hash 129438122, now seen corresponding path program 1 times [2020-10-27 00:14:33,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:14:33,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134507039] [2020-10-27 00:14:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:14:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:34,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:34,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:35,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:35,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:35,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 00:14:35,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:14:35,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1675 [2020-10-27 00:14:35,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:35,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:14:35,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:14:35,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 00:14:35,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:14:35,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:14:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:35,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:35,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:35,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:14:35,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:35,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:14:35,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:35,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:14:35,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:14:35,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:14:35,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:14:35,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:14:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:35,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:36,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:36,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:36,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:14:36,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:14:36,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-27 00:14:36,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:14:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:14:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:14:36,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:14:36,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134507039] [2020-10-27 00:14:36,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:14:36,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:14:36,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104035702] [2020-10-27 00:14:36,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:14:36,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:14:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:14:36,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:14:36,457 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 6 states. [2020-10-27 00:14:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:14:54,524 INFO L93 Difference]: Finished difference Result 2940 states and 4547 transitions. [2020-10-27 00:14:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:14:54,527 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-10-27 00:14:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:14:54,543 INFO L225 Difference]: With dead ends: 2940 [2020-10-27 00:14:54,543 INFO L226 Difference]: Without dead ends: 1943 [2020-10-27 00:14:54,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:14:54,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2020-10-27 00:14:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1931. [2020-10-27 00:14:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1931 states. [2020-10-27 00:14:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 2596 transitions. [2020-10-27 00:14:54,653 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 2596 transitions. Word has length 97 [2020-10-27 00:14:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:14:54,653 INFO L481 AbstractCegarLoop]: Abstraction has 1931 states and 2596 transitions. [2020-10-27 00:14:54,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:14:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 2596 transitions. [2020-10-27 00:14:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 00:14:54,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:14:54,662 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:14:54,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:14:54,662 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:14:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:14:54,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1718328201, now seen corresponding path program 1 times [2020-10-27 00:14:54,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:14:54,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907546346] [2020-10-27 00:14:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:14:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:54,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:55,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:55,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 00:14:55,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:55,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-27 00:14:55,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:55,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:14:55,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:14:55,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 00:14:55,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:55,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:14:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:55,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:55,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:55,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:14:55,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:55,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 00:14:55,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:55,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:14:55,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:14:55,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:14:55,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:55,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:14:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:14:55,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:14:55,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:14:55,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:14:55,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:14:55,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 00:14:55,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:14:55,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:14:55,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:14:55,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:14:55,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:14:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:14:55,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907546346] [2020-10-27 00:14:55,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:14:55,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:14:55,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719872939] [2020-10-27 00:14:55,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:14:55,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:14:55,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:14:55,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:14:55,960 INFO L87 Difference]: Start difference. First operand 1931 states and 2596 transitions. Second operand 8 states. [2020-10-27 00:14:56,718 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-27 00:15:00,030 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:15:17,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:15:17,779 INFO L93 Difference]: Finished difference Result 5236 states and 7167 transitions. [2020-10-27 00:15:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 00:15:17,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 100 [2020-10-27 00:15:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:15:17,803 INFO L225 Difference]: With dead ends: 5236 [2020-10-27 00:15:17,804 INFO L226 Difference]: Without dead ends: 3311 [2020-10-27 00:15:17,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-27 00:15:17,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2020-10-27 00:15:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 3284. [2020-10-27 00:15:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3284 states. [2020-10-27 00:15:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 4160 transitions. [2020-10-27 00:15:17,914 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 4160 transitions. Word has length 100 [2020-10-27 00:15:17,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:15:17,915 INFO L481 AbstractCegarLoop]: Abstraction has 3284 states and 4160 transitions. [2020-10-27 00:15:17,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:15:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 4160 transitions. [2020-10-27 00:15:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 00:15:17,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:17,920 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:15:17,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:15:17,921 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:17,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2146218017, now seen corresponding path program 1 times [2020-10-27 00:15:17,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:17,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100771403] [2020-10-27 00:15:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:18,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:18,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:18,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:22,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:22,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:22,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-27 00:15:22,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:15:22,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 00:15:22,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:15:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:15:22,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-27 00:15:22,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:23,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:23,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:23,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:23,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:23,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:23,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:15:23,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:23,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:23,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:23,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:15:23,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:23,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:15:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:23,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:23,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:23,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:23,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:15:23,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:15:23,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 00:15:23,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:23,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:23,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:23,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:15:23,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:23,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-27 00:15:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:23,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:23,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:23,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 00:15:23,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:23,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-27 00:15:23,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:23,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:23,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:23,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 00:15:23,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 00:15:24,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100771403] [2020-10-27 00:15:24,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:15:24,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:15:24,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964933932] [2020-10-27 00:15:24,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:15:24,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:24,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:15:24,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:15:24,011 INFO L87 Difference]: Start difference. First operand 3284 states and 4160 transitions. Second operand 8 states. [2020-10-27 00:15:38,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:15:38,760 INFO L93 Difference]: Finished difference Result 8918 states and 11570 transitions. [2020-10-27 00:15:38,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:15:38,761 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 169 [2020-10-27 00:15:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:15:38,790 INFO L225 Difference]: With dead ends: 8918 [2020-10-27 00:15:38,791 INFO L226 Difference]: Without dead ends: 5189 [2020-10-27 00:15:38,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:15:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5189 states. [2020-10-27 00:15:38,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5189 to 4252. [2020-10-27 00:15:38,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4252 states. [2020-10-27 00:15:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4252 states to 4252 states and 5115 transitions. [2020-10-27 00:15:38,944 INFO L78 Accepts]: Start accepts. Automaton has 4252 states and 5115 transitions. Word has length 169 [2020-10-27 00:15:38,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:15:38,944 INFO L481 AbstractCegarLoop]: Abstraction has 4252 states and 5115 transitions. [2020-10-27 00:15:38,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:15:38,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4252 states and 5115 transitions. [2020-10-27 00:15:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-27 00:15:38,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:15:38,948 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:15:38,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:15:38,948 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:15:38,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:15:38,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1164200594, now seen corresponding path program 1 times [2020-10-27 00:15:38,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:15:38,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767676470] [2020-10-27 00:15:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:15:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:39,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:39,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:40,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:40,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-27 00:15:40,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:15:40,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1261 [2020-10-27 00:15:40,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:40,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:40,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:15:40,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:15:40,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:40,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:15:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:40,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:40,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:40,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:15:40,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:40,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 00:15:40,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:40,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:15:40,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:40,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:15:40,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:40,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:15:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:40,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:40,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:40,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:15:40,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:40,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-27 00:15:40,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:40,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:15:40,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:15:40,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:15:40,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:15:40,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:15:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:15:40,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:15:40,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:15:40,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 00:15:40,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:15:40,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-27 00:15:40,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:15:40,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:15:40,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:15:40,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 00:15:40,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:15:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:15:40,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767676470] [2020-10-27 00:15:40,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:15:40,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:15:40,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660142053] [2020-10-27 00:15:40,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:15:40,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:15:40,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:15:40,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:15:40,980 INFO L87 Difference]: Start difference. First operand 4252 states and 5115 transitions. Second operand 7 states. [2020-10-27 00:16:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:01,235 INFO L93 Difference]: Finished difference Result 10378 states and 13024 transitions. [2020-10-27 00:16:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:16:01,237 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 182 [2020-10-27 00:16:01,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:01,271 INFO L225 Difference]: With dead ends: 10378 [2020-10-27 00:16:01,272 INFO L226 Difference]: Without dead ends: 6570 [2020-10-27 00:16:01,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:16:01,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6570 states. [2020-10-27 00:16:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6570 to 6531. [2020-10-27 00:16:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6531 states. [2020-10-27 00:16:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6531 states to 6531 states and 7867 transitions. [2020-10-27 00:16:01,481 INFO L78 Accepts]: Start accepts. Automaton has 6531 states and 7867 transitions. Word has length 182 [2020-10-27 00:16:01,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:01,482 INFO L481 AbstractCegarLoop]: Abstraction has 6531 states and 7867 transitions. [2020-10-27 00:16:01,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:16:01,482 INFO L276 IsEmpty]: Start isEmpty. Operand 6531 states and 7867 transitions. [2020-10-27 00:16:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-27 00:16:01,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:01,486 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:16:01,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:16:01,486 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:01,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1974835960, now seen corresponding path program 1 times [2020-10-27 00:16:01,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:01,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778753936] [2020-10-27 00:16:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:01,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:01,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:01,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:06,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:06,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-27 00:16:06,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:16:06,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 00:16:06,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:06,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:16:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:16:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 00:16:06,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:06,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:06,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:06,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:06,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:06,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:06,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 00:16:06,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:06,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:16:06,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:06,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:16:06,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:06,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:06,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:06,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:06,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:16:06,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:06,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-27 00:16:06,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:06,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:06,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:06,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:16:06,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:07,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:16:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:07,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:07,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:07,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:07,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:16:07,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:16:07,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 00:16:07,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:07,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:07,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:07,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:16:07,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:16:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 113 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:16:07,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778753936] [2020-10-27 00:16:07,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:07,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:16:07,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959614955] [2020-10-27 00:16:07,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:16:07,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:07,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:16:07,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:16:07,643 INFO L87 Difference]: Start difference. First operand 6531 states and 7867 transitions. Second operand 6 states. [2020-10-27 00:16:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:23,744 INFO L93 Difference]: Finished difference Result 13078 states and 16181 transitions. [2020-10-27 00:16:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 00:16:23,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 199 [2020-10-27 00:16:23,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:23,786 INFO L225 Difference]: With dead ends: 13078 [2020-10-27 00:16:23,786 INFO L226 Difference]: Without dead ends: 6991 [2020-10-27 00:16:23,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:16:23,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6991 states. [2020-10-27 00:16:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6991 to 6964. [2020-10-27 00:16:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6964 states. [2020-10-27 00:16:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6964 states to 6964 states and 8516 transitions. [2020-10-27 00:16:24,095 INFO L78 Accepts]: Start accepts. Automaton has 6964 states and 8516 transitions. Word has length 199 [2020-10-27 00:16:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:16:24,096 INFO L481 AbstractCegarLoop]: Abstraction has 6964 states and 8516 transitions. [2020-10-27 00:16:24,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:16:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6964 states and 8516 transitions. [2020-10-27 00:16:24,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-27 00:16:24,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:16:24,102 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:16:24,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:16:24,103 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:16:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:16:24,104 INFO L82 PathProgramCache]: Analyzing trace with hash -679102628, now seen corresponding path program 1 times [2020-10-27 00:16:24,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:16:24,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377609237] [2020-10-27 00:16:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:16:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:24,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:24,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:25,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:26,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:27,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:27,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-27 00:16:27,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:16:27,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3793 [2020-10-27 00:16:27,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:27,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:16:27,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:16:27,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 277 [2020-10-27 00:16:27,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:28,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:16:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:28,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:28,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:28,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:16:28,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:28,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:16:28,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:28,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:16:28,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:16:28,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:16:28,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:28,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:16:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:28,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:28,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:28,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:16:28,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:28,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-27 00:16:28,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:28,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:16:28,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:28,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:16:28,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:28,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:16:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:28,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:28,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:28,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:16:28,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:28,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-27 00:16:28,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:28,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:28,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:28,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:16:28,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:28,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:16:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:16:29,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:16:29,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:16:29,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:16:29,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:16:29,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 00:16:29,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:16:29,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:16:29,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:16:29,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:16:29,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:16:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 152 proven. 49 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 00:16:29,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377609237] [2020-10-27 00:16:29,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:16:29,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:16:29,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652422940] [2020-10-27 00:16:29,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:16:29,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:16:29,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:16:29,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:16:29,299 INFO L87 Difference]: Start difference. First operand 6964 states and 8516 transitions. Second operand 9 states. [2020-10-27 00:16:30,441 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:16:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:16:59,516 INFO L93 Difference]: Finished difference Result 20872 states and 27249 transitions. [2020-10-27 00:16:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 00:16:59,518 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 270 [2020-10-27 00:16:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:16:59,591 INFO L225 Difference]: With dead ends: 20872 [2020-10-27 00:16:59,592 INFO L226 Difference]: Without dead ends: 13878 [2020-10-27 00:16:59,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-27 00:16:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13878 states. [2020-10-27 00:16:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13878 to 13267. [2020-10-27 00:16:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13267 states. [2020-10-27 00:17:00,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13267 states to 13267 states and 16426 transitions. [2020-10-27 00:17:00,027 INFO L78 Accepts]: Start accepts. Automaton has 13267 states and 16426 transitions. Word has length 270 [2020-10-27 00:17:00,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:00,028 INFO L481 AbstractCegarLoop]: Abstraction has 13267 states and 16426 transitions. [2020-10-27 00:17:00,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:17:00,028 INFO L276 IsEmpty]: Start isEmpty. Operand 13267 states and 16426 transitions. [2020-10-27 00:17:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-27 00:17:00,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:00,036 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:17:00,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:17:00,037 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:00,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:00,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2028771257, now seen corresponding path program 1 times [2020-10-27 00:17:00,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:00,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388719433] [2020-10-27 00:17:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:00,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:00,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:01,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:05,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:05,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-27 00:17:05,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:17:05,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-27 00:17:05,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:05,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:17:05,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:17:05,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:05,396 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:17:05,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:05,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:05,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:05,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:05,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:05,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 00:17:05,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:05,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:05,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:05,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:05,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:05,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:05,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:17:05,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:05,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 00:17:05,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:17:05,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:05,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:17:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:05,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:05,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:05,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 00:17:05,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:05,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-27 00:17:05,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:05,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:05,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:05,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 00:17:05,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:06,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-10-27 00:17:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:06,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:06,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:06,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:17:06,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:06,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 00:17:06,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:06,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:06,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:17:06,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:06,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 142 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 00:17:06,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388719433] [2020-10-27 00:17:06,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:06,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:17:06,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132259722] [2020-10-27 00:17:06,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:17:06,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:06,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:17:06,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:17:06,321 INFO L87 Difference]: Start difference. First operand 13267 states and 16426 transitions. Second operand 7 states. [2020-10-27 00:17:07,461 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:17:14,494 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:17:39,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:17:39,914 INFO L93 Difference]: Finished difference Result 32804 states and 42090 transitions. [2020-10-27 00:17:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:17:39,916 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 291 [2020-10-27 00:17:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:17:40,014 INFO L225 Difference]: With dead ends: 32804 [2020-10-27 00:17:40,014 INFO L226 Difference]: Without dead ends: 19543 [2020-10-27 00:17:40,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:17:40,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19543 states. [2020-10-27 00:17:40,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19543 to 18923. [2020-10-27 00:17:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18923 states. [2020-10-27 00:17:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18923 states to 18923 states and 23506 transitions. [2020-10-27 00:17:40,664 INFO L78 Accepts]: Start accepts. Automaton has 18923 states and 23506 transitions. Word has length 291 [2020-10-27 00:17:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:40,665 INFO L481 AbstractCegarLoop]: Abstraction has 18923 states and 23506 transitions. [2020-10-27 00:17:40,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:17:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 18923 states and 23506 transitions. [2020-10-27 00:17:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-27 00:17:40,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:40,673 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:17:40,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:17:40,674 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:40,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:40,674 INFO L82 PathProgramCache]: Analyzing trace with hash 361487229, now seen corresponding path program 1 times [2020-10-27 00:17:40,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:40,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465664861] [2020-10-27 00:17:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:40,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:40,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:41,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:45,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:45,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-27 00:17:45,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:17:45,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 00:17:45,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:45,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:45,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:17:45,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 00:17:45,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:46,016 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:17:46,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:46,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:46,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:46,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:46,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:46,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:17:46,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:46,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:46,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:46,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:46,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:46,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:46,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:46,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:46,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:17:46,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:46,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-27 00:17:46,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:46,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:46,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:46,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:17:46,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:46,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:17:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:46,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:46,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:46,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:17:46,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:46,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-27 00:17:46,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:46,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:46,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:46,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:17:46,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:46,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-27 00:17:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:46,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:46,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:46,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:17:46,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:46,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 00:17:46,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:46,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:46,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:17:46,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:46,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 142 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 00:17:47,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465664861] [2020-10-27 00:17:47,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:47,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:17:47,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280367100] [2020-10-27 00:17:47,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:17:47,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:47,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:17:47,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:17:47,115 INFO L87 Difference]: Start difference. First operand 18923 states and 23506 transitions. Second operand 7 states. [2020-10-27 00:17:48,185 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 70