/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_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:17:33,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:17:33,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:17:33,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:17:33,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:17:33,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:17:33,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:17:34,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:17:34,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:17:34,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:17:34,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:17:34,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:17:34,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:17:34,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:17:34,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:17:34,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:17:34,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:17:34,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:17:34,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:17:34,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:17:34,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:17:34,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:17:34,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:17:34,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:17:34,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:17:34,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:17:34,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:17:34,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:17:34,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:17:34,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:17:34,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:17:34,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:17:34,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:17:34,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:17:34,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:17:34,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:17:34,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:17:34,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:17:34,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:17:34,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:17:34,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:17:34,157 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 00:17:34,238 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:17:34,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:17:34,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:17:34,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:17:34,249 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:17:34,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:17:34,249 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:17:34,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:17:34,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:17:34,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:17:34,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:17:34,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:17:34,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:17:34,253 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:17:34,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:17:34,254 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:17:34,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:17:34,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:17:34,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:17:34,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:17:34,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:17:34,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:17:34,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:17:34,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:17:34,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:17:34,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:17:34,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:17:34,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:17:34,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:17:34,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:17:34,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:17:34,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:17:34,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:17:34,940 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:17:34,941 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:17:34,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label46.c [2020-10-27 00:17:35,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6fd217a7/613cb5b4fad74adba81a180fdf15f76f/FLAG46f115d6d [2020-10-27 00:17:36,311 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:17:36,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label46.c [2020-10-27 00:17:36,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6fd217a7/613cb5b4fad74adba81a180fdf15f76f/FLAG46f115d6d [2020-10-27 00:17:36,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6fd217a7/613cb5b4fad74adba81a180fdf15f76f [2020-10-27 00:17:36,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:17:36,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:17:36,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:17:36,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:17:36,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:17:36,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:17:36" (1/1) ... [2020-10-27 00:17:36,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15a0c0f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:36, skipping insertion in model container [2020-10-27 00:17:36,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:17:36" (1/1) ... [2020-10-27 00:17:36,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:17:36,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:17:38,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:17:38,389 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:17:39,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:17:39,084 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:17:39,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:39 WrapperNode [2020-10-27 00:17:39,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:17:39,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:17:39,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:17:39,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:17:39,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:39" (1/1) ... [2020-10-27 00:17:39,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:39" (1/1) ... [2020-10-27 00:17:39,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:39" (1/1) ... [2020-10-27 00:17:39,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:39" (1/1) ... [2020-10-27 00:17:39,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:39" (1/1) ... [2020-10-27 00:17:39,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:39" (1/1) ... [2020-10-27 00:17:39,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:39" (1/1) ... [2020-10-27 00:17:39,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:17:39,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:17:39,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:17:39,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:17:39,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:39" (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 00:17:39,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:17:39,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:17:39,614 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:17:39,614 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:17:39,614 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:17:39,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:17:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:17:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:17:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:17:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:17:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:17:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:17:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:17:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:17:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:17:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:17:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:17:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:17:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:17:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:17:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:17:49,929 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:17:49,930 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:17:49,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:17:49 BoogieIcfgContainer [2020-10-27 00:17:49,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:17:49,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:17:49,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:17:49,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:17:49,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:17:36" (1/3) ... [2020-10-27 00:17:49,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d309e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:17:49, skipping insertion in model container [2020-10-27 00:17:49,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:17:39" (2/3) ... [2020-10-27 00:17:49,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d309e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:17:49, skipping insertion in model container [2020-10-27 00:17:49,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:17:49" (3/3) ... [2020-10-27 00:17:49,949 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label46.c [2020-10-27 00:17:49,967 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:17:49,976 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:17:49,995 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:17:50,040 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:17:50,041 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:17:50,041 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:17:50,041 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:17:50,041 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:17:50,041 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:17:50,041 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:17:50,042 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:17:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:17:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 00:17:50,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:50,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:17:50,114 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:50,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:50,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1566239661, now seen corresponding path program 1 times [2020-10-27 00:17:50,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:50,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588583948] [2020-10-27 00:17:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:50,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:51,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:51,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 00:17:51,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:51,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-27 00:17:51,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:51,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:17:51,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:17:51,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 00:17:51,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:17:51,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:51,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:51,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:51,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:51,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:51,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 00:17:51,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:51,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:51,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:51,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:17:51,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:51,336 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 00:17:51,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588583948] [2020-10-27 00:17:51,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:17:51,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:17:51,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191183869] [2020-10-27 00:17:51,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:17:51,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:51,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:17:51,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:17:51,376 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:18:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:18:06,164 INFO L93 Difference]: Finished difference Result 1721 states and 3132 transitions. [2020-10-27 00:18:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:18:06,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 00:18:06,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:18:06,199 INFO L225 Difference]: With dead ends: 1721 [2020-10-27 00:18:06,200 INFO L226 Difference]: Without dead ends: 1035 [2020-10-27 00:18:06,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:18:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2020-10-27 00:18:06,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1009. [2020-10-27 00:18:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1009 states. [2020-10-27 00:18:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1706 transitions. [2020-10-27 00:18:06,443 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1706 transitions. Word has length 17 [2020-10-27 00:18:06,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:18:06,444 INFO L481 AbstractCegarLoop]: Abstraction has 1009 states and 1706 transitions. [2020-10-27 00:18:06,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:18:06,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1706 transitions. [2020-10-27 00:18:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 00:18:06,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:06,453 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:18:06,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:18:06,453 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:06,456 INFO L82 PathProgramCache]: Analyzing trace with hash 306424974, now seen corresponding path program 1 times [2020-10-27 00:18:06,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:06,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915782169] [2020-10-27 00:18:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:06,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:06,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:07,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:07,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:07,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 00:18:07,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:18:07,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1184 [2020-10-27 00:18:07,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:07,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:18:07,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:07,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:18:07,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:18:07,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:07,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:07,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:07,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:07,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:07,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 00:18:07,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:07,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:07,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:07,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:07,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:07,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:08,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:08,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:08,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 00:18:08,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:08,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-27 00:18:08,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:08,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:08,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:08,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 00:18:08,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:18:08,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915782169] [2020-10-27 00:18:08,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:18:08,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:18:08,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024212506] [2020-10-27 00:18:08,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:18:08,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:08,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:18:08,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:18:08,472 INFO L87 Difference]: Start difference. First operand 1009 states and 1706 transitions. Second operand 7 states. [2020-10-27 00:18:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:18:25,057 INFO L93 Difference]: Finished difference Result 3008 states and 5134 transitions. [2020-10-27 00:18:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:18:25,059 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2020-10-27 00:18:25,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:18:25,075 INFO L225 Difference]: With dead ends: 3008 [2020-10-27 00:18:25,075 INFO L226 Difference]: Without dead ends: 2005 [2020-10-27 00:18:25,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:18:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2020-10-27 00:18:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1952. [2020-10-27 00:18:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1952 states. [2020-10-27 00:18:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 2892 transitions. [2020-10-27 00:18:25,165 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 2892 transitions. Word has length 86 [2020-10-27 00:18:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:18:25,166 INFO L481 AbstractCegarLoop]: Abstraction has 1952 states and 2892 transitions. [2020-10-27 00:18:25,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:18:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 2892 transitions. [2020-10-27 00:18:25,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 00:18:25,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:25,170 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:18:25,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:18:25,170 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:25,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:25,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1992778686, now seen corresponding path program 1 times [2020-10-27 00:18:25,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:25,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011153612] [2020-10-27 00:18:25,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:25,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:25,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:26,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:26,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 00:18:26,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:18:26,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1060 [2020-10-27 00:18:26,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:26,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:18:26,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:26,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 00:18:26,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:26,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:26,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:26,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:26,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:26,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:26,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 00:18:26,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:26,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:26,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:26,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:26,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:26,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 00:18:26,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:26,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-27 00:18:26,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:26,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:26,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:26,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 00:18:26,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:18:26,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011153612] [2020-10-27 00:18:26,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:18:26,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:18:26,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487244190] [2020-10-27 00:18:26,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:18:26,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:26,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:18:26,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:18:26,774 INFO L87 Difference]: Start difference. First operand 1952 states and 2892 transitions. Second operand 7 states. [2020-10-27 00:18:26,950 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:18:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:18:43,356 INFO L93 Difference]: Finished difference Result 5816 states and 8755 transitions. [2020-10-27 00:18:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:18:43,357 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-10-27 00:18:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:18:43,388 INFO L225 Difference]: With dead ends: 5816 [2020-10-27 00:18:43,389 INFO L226 Difference]: Without dead ends: 3870 [2020-10-27 00:18:43,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:18:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2020-10-27 00:18:43,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3332. [2020-10-27 00:18:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3332 states. [2020-10-27 00:18:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 4349 transitions. [2020-10-27 00:18:43,553 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 4349 transitions. Word has length 96 [2020-10-27 00:18:43,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:18:43,556 INFO L481 AbstractCegarLoop]: Abstraction has 3332 states and 4349 transitions. [2020-10-27 00:18:43,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:18:43,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 4349 transitions. [2020-10-27 00:18:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 00:18:43,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:43,570 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 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 00:18:43,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:18:43,575 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:43,577 INFO L82 PathProgramCache]: Analyzing trace with hash 587797487, now seen corresponding path program 1 times [2020-10-27 00:18:43,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:43,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872019650] [2020-10-27 00:18:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:43,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:44,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:44,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:45,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:45,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-27 00:18:45,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:18:45,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1731 [2020-10-27 00:18:45,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:45,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:18:45,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:18:45,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 00:18:45,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:45,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:45,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:45,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:45,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:45,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:45,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 00:18:45,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:45,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:18:45,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:45,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:18:45,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:45,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:45,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:45,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:45,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:18:45,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:45,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-27 00:18:45,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:45,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:45,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:45,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:18:45,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:45,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:18:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:45,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:45,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:45,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 00:18:45,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:45,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-27 00:18:45,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:45,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 00:18:45,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:18:46,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872019650] [2020-10-27 00:18:46,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:18:46,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:18:46,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430990702] [2020-10-27 00:18:46,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:18:46,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:46,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:18:46,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:18:46,069 INFO L87 Difference]: Start difference. First operand 3332 states and 4349 transitions. Second operand 6 states. [2020-10-27 00:19:02,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:02,736 INFO L93 Difference]: Finished difference Result 8618 states and 11686 transitions. [2020-10-27 00:19:02,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:19:02,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2020-10-27 00:19:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:02,768 INFO L225 Difference]: With dead ends: 8618 [2020-10-27 00:19:02,768 INFO L226 Difference]: Without dead ends: 4374 [2020-10-27 00:19:02,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:19:02,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4374 states. [2020-10-27 00:19:02,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4374 to 4290. [2020-10-27 00:19:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4290 states. [2020-10-27 00:19:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4290 states to 4290 states and 5413 transitions. [2020-10-27 00:19:02,948 INFO L78 Accepts]: Start accepts. Automaton has 4290 states and 5413 transitions. Word has length 173 [2020-10-27 00:19:02,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:02,950 INFO L481 AbstractCegarLoop]: Abstraction has 4290 states and 5413 transitions. [2020-10-27 00:19:02,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:19:02,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4290 states and 5413 transitions. [2020-10-27 00:19:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-27 00:19:02,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:02,957 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 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 00:19:02,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:19:02,958 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:02,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:02,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1704427874, now seen corresponding path program 1 times [2020-10-27 00:19:02,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:02,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087851511] [2020-10-27 00:19:02,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:03,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:03,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:04,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:04,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-27 00:19:04,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:19:04,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1361 [2020-10-27 00:19:04,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:04,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:04,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:19:04,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:19:04,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:04,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:04,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:04,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:04,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:04,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:04,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:19:04,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:04,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:19:04,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:04,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:19:04,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:04,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:04,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:04,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:04,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:19:04,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:04,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 00:19:04,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:04,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:04,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:04,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:19:04,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 00:19:04,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:19:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:04,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:05,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:05,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 00:19:05,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:05,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-27 00:19:05,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:05,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:05,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:05,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 00:19:05,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:19:05,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087851511] [2020-10-27 00:19:05,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:05,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:19:05,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568160543] [2020-10-27 00:19:05,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:19:05,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:05,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:19:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:19:05,159 INFO L87 Difference]: Start difference. First operand 4290 states and 5413 transitions. Second operand 8 states. [2020-10-27 00:19:21,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:21,689 INFO L93 Difference]: Finished difference Result 11353 states and 15033 transitions. [2020-10-27 00:19:21,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 00:19:21,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 174 [2020-10-27 00:19:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:21,729 INFO L225 Difference]: With dead ends: 11353 [2020-10-27 00:19:21,730 INFO L226 Difference]: Without dead ends: 7069 [2020-10-27 00:19:21,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:19:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7069 states. [2020-10-27 00:19:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7069 to 6597. [2020-10-27 00:19:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6597 states. [2020-10-27 00:19:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6597 states to 6597 states and 8521 transitions. [2020-10-27 00:19:21,974 INFO L78 Accepts]: Start accepts. Automaton has 6597 states and 8521 transitions. Word has length 174 [2020-10-27 00:19:21,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:21,975 INFO L481 AbstractCegarLoop]: Abstraction has 6597 states and 8521 transitions. [2020-10-27 00:19:21,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:19:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6597 states and 8521 transitions. [2020-10-27 00:19:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-27 00:19:21,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:21,978 INFO L422 BasicCegarLoop]: trace histogram [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, 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 00:19:21,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:19:21,979 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:21,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:21,980 INFO L82 PathProgramCache]: Analyzing trace with hash -572106597, now seen corresponding path program 1 times [2020-10-27 00:19:21,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:21,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908028754] [2020-10-27 00:19:21,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:22,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:22,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:24,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:26,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:26,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 00:19:26,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:19:26,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4366 [2020-10-27 00:19:26,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:26,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:19:26,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:26,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-27 00:19:26,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:26,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:26,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:26,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:26,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:26,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:26,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 00:19:26,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:26,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:26,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:26,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:26,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:26,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:26,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:26,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:26,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:19:26,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:26,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-27 00:19:26,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:26,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:19:26,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:26,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:19:26,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:26,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:19:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:26,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:27,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:27,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:27,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:19:27,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:19:27,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-27 00:19:27,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:27,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:27,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:27,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:19:27,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:19:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-27 00:19:27,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908028754] [2020-10-27 00:19:27,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:27,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:19:27,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320504431] [2020-10-27 00:19:27,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:19:27,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:27,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:19:27,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:19:27,439 INFO L87 Difference]: Start difference. First operand 6597 states and 8521 transitions. Second operand 8 states. [2020-10-27 00:19:56,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:56,343 INFO L93 Difference]: Finished difference Result 23853 states and 32717 transitions. [2020-10-27 00:19:56,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:19:56,346 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 179 [2020-10-27 00:19:56,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:56,495 INFO L225 Difference]: With dead ends: 23853 [2020-10-27 00:19:56,495 INFO L226 Difference]: Without dead ends: 16308 [2020-10-27 00:19:56,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:19:56,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16308 states. [2020-10-27 00:19:57,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16308 to 16207. [2020-10-27 00:19:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16207 states. [2020-10-27 00:19:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16207 states to 16207 states and 20975 transitions. [2020-10-27 00:19:57,087 INFO L78 Accepts]: Start accepts. Automaton has 16207 states and 20975 transitions. Word has length 179 [2020-10-27 00:19:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:57,088 INFO L481 AbstractCegarLoop]: Abstraction has 16207 states and 20975 transitions. [2020-10-27 00:19:57,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:19:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 16207 states and 20975 transitions. [2020-10-27 00:19:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-27 00:19:57,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:57,092 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:57,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:19:57,092 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1815685915, now seen corresponding path program 1 times [2020-10-27 00:19:57,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:57,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865943253] [2020-10-27 00:19:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:57,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:57,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:57,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:02,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:02,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-27 00:20:02,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:20:02,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 00:20:02,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:02,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:20:02,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:20:02,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 00:20:02,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:20:02,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:02,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:02,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:02,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:02,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:02,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 00:20:02,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:02,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:20:02,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:02,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:20:02,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:02,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:02,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:02,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:02,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:02,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:02,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 00:20:02,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:02,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:02,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:02,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:20:02,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:02,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:02,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:02,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:02,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:02,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:20:02,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:20:02,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-27 00:20:02,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:02,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:02,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:02,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:20:02,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 90 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:20:03,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865943253] [2020-10-27 00:20:03,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:03,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:20:03,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820036309] [2020-10-27 00:20:03,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:20:03,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:03,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:20:03,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:20:03,114 INFO L87 Difference]: Start difference. First operand 16207 states and 20975 transitions. Second operand 6 states. [2020-10-27 00:20:03,945 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:20:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:18,359 INFO L93 Difference]: Finished difference Result 33430 states and 45585 transitions. [2020-10-27 00:20:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:20:18,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 190 [2020-10-27 00:20:18,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:18,454 INFO L225 Difference]: With dead ends: 33430 [2020-10-27 00:20:18,455 INFO L226 Difference]: Without dead ends: 17229 [2020-10-27 00:20:18,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:20:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17229 states. [2020-10-27 00:20:19,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17229 to 17080. [2020-10-27 00:20:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17080 states. [2020-10-27 00:20:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17080 states to 17080 states and 22781 transitions. [2020-10-27 00:20:19,385 INFO L78 Accepts]: Start accepts. Automaton has 17080 states and 22781 transitions. Word has length 190 [2020-10-27 00:20:19,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:19,385 INFO L481 AbstractCegarLoop]: Abstraction has 17080 states and 22781 transitions. [2020-10-27 00:20:19,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:20:19,386 INFO L276 IsEmpty]: Start isEmpty. Operand 17080 states and 22781 transitions. [2020-10-27 00:20:19,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-27 00:20:19,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:19,392 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 00:20:19,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:20:19,393 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:19,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:19,395 INFO L82 PathProgramCache]: Analyzing trace with hash -481567192, now seen corresponding path program 1 times [2020-10-27 00:20:19,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:19,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951489635] [2020-10-27 00:20:19,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:19,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:20,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:20,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:24,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:24,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:24,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-27 00:20:24,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:20:24,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-27 00:20:24,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:24,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:20:24,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:20:24,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 258 [2020-10-27 00:20:24,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:24,784 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:20:24,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:24,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:24,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:24,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:24,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:24,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 00:20:24,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:24,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:24,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:24,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:20:24,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:20:24,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:24,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:25,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:25,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:25,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:25,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-27 00:20:25,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:25,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:20:25,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:25,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:20:25,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:25,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:25,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:25,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:25,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:20:25,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:25,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-27 00:20:25,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:25,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:25,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:25,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:20:25,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:25,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:20:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:25,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:25,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:25,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:20:25,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:25,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-27 00:20:25,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:25,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:25,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:25,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:20:25,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 103 proven. 85 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:20:25,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951489635] [2020-10-27 00:20:25,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:25,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:20:25,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623845813] [2020-10-27 00:20:25,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:20:25,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:25,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:20:25,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:20:25,976 INFO L87 Difference]: Start difference. First operand 17080 states and 22781 transitions. Second operand 10 states. [2020-10-27 00:20:26,152 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:20:27,470 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:20:36,788 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:20:39,852 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:21:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:02,967 INFO L93 Difference]: Finished difference Result 48292 states and 69487 transitions. [2020-10-27 00:21:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 00:21:02,974 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 265 [2020-10-27 00:21:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:03,172 INFO L225 Difference]: With dead ends: 48292 [2020-10-27 00:21:03,173 INFO L226 Difference]: Without dead ends: 29399 [2020-10-27 00:21:03,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-27 00:21:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29399 states. [2020-10-27 00:21:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29399 to 25596. [2020-10-27 00:21:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25596 states. [2020-10-27 00:21:04,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25596 states to 25596 states and 33799 transitions. [2020-10-27 00:21:04,533 INFO L78 Accepts]: Start accepts. Automaton has 25596 states and 33799 transitions. Word has length 265 [2020-10-27 00:21:04,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:04,534 INFO L481 AbstractCegarLoop]: Abstraction has 25596 states and 33799 transitions. [2020-10-27 00:21:04,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:21:04,534 INFO L276 IsEmpty]: Start isEmpty. Operand 25596 states and 33799 transitions. [2020-10-27 00:21:04,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-27 00:21:04,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:04,542 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:04,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:21:04,542 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:04,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:04,543 INFO L82 PathProgramCache]: Analyzing trace with hash -2118186201, now seen corresponding path program 1 times [2020-10-27 00:21:04,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:04,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126815169] [2020-10-27 00:21:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:04,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:04,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:05,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:09,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:09,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 304 [2020-10-27 00:21:09,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:21:09,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 00:21:09,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:21:09,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 00:21:09,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:09,938 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:21:09,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:09,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:09,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:09,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:09,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:09,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:21:09,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:09,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:09,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:09,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:09,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:21:10,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:10,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:10,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:10,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:21:10,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:10,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 00:21:10,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:10,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:10,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:21:10,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:10,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:21:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:10,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:10,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:10,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:21:10,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:10,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-27 00:21:10,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:10,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:10,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:10,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:21:10,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:10,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-27 00:21:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:10,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:10,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:10,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:21:10,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:10,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 00:21:10,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:10,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:10,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:21:10,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:10,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 115 proven. 74 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-27 00:21:11,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126815169] [2020-10-27 00:21:11,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:11,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:21:11,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769199983] [2020-10-27 00:21:11,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:21:11,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:11,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:21:11,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:21:11,056 INFO L87 Difference]: Start difference. First operand 25596 states and 33799 transitions. Second operand 7 states. [2020-10-27 00:21:12,297 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 00:21:19,030 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 71