/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/Problem13_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:18:58,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:18:58,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:18:58,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:18:58,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:18:58,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:18:58,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:18:58,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:18:58,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:18:58,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:18:58,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:18:58,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:18:58,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:18:58,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:18:58,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:18:58,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:18:58,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:18:58,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:18:58,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:18:58,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:18:58,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:18:58,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:18:58,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:18:58,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:18:58,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:18:58,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:18:58,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:18:58,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:18:58,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:18:58,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:18:58,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:18:58,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:18:58,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:18:58,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:18:58,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:18:58,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:18:58,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:18:58,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:18:58,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:18:58,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:18:58,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:18:58,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 23:18:58,512 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:18:58,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:18:58,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:18:58,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:18:58,515 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:18:58,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:18:58,515 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:18:58,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:18:58,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:18:58,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:18:58,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:18:58,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:18:58,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:18:58,517 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:18:58,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:18:58,517 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:18:58,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:18:58,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:18:58,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:18:58,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:18:58,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:18:58,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:18:58,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:18:58,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:18:58,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:18:58,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:18:58,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:18:58,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:18:58,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:18:58,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:18:58,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:18:58,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:18:58,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:18:58,967 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:18:58,968 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:18:58,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label59.c [2020-10-26 23:18:59,073 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52e508774/f3ed97e045694a7faa8e8146f50292b1/FLAG4ace021f1 [2020-10-26 23:19:00,200 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:19:00,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label59.c [2020-10-26 23:19:00,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52e508774/f3ed97e045694a7faa8e8146f50292b1/FLAG4ace021f1 [2020-10-26 23:19:00,573 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52e508774/f3ed97e045694a7faa8e8146f50292b1 [2020-10-26 23:19:00,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:19:00,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:19:00,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:19:00,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:19:00,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:19:00,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:19:00" (1/1) ... [2020-10-26 23:19:00,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5883e055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:00, skipping insertion in model container [2020-10-26 23:19:00,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:19:00" (1/1) ... [2020-10-26 23:19:00,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:19:00,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:19:02,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:19:02,539 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:19:03,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:19:03,622 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:19:03,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:03 WrapperNode [2020-10-26 23:19:03,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:19:03,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:19:03,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:19:03,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:19:03,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:03" (1/1) ... [2020-10-26 23:19:03,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:03" (1/1) ... [2020-10-26 23:19:03,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:03" (1/1) ... [2020-10-26 23:19:03,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:03" (1/1) ... [2020-10-26 23:19:03,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:03" (1/1) ... [2020-10-26 23:19:04,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:03" (1/1) ... [2020-10-26 23:19:04,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:03" (1/1) ... [2020-10-26 23:19:04,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:19:04,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:19:04,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:19:04,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:19:04,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:19:04,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:19:04,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:19:04,262 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:19:04,262 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:19:04,262 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:19:04,262 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:19:04,263 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:19:04,263 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:19:04,263 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:19:04,263 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:19:04,263 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:19:04,263 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:19:04,264 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:19:04,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:19:04,264 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:19:04,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:19:04,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:19:04,264 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:19:04,264 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:19:04,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:19:04,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:19:04,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:19:04,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:19:04,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:19:04,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:19:16,965 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:19:16,965 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:19:16,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:19:16 BoogieIcfgContainer [2020-10-26 23:19:16,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:19:16,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:19:16,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:19:16,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:19:16,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:19:00" (1/3) ... [2020-10-26 23:19:16,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e73334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:19:16, skipping insertion in model container [2020-10-26 23:19:16,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:19:03" (2/3) ... [2020-10-26 23:19:16,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e73334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:19:16, skipping insertion in model container [2020-10-26 23:19:16,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:19:16" (3/3) ... [2020-10-26 23:19:16,986 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label59.c [2020-10-26 23:19:17,005 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:19:17,011 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:19:17,028 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:19:17,078 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:19:17,078 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:19:17,078 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:19:17,078 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:19:17,078 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:19:17,079 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:19:17,079 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:19:17,080 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:19:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:19:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 23:19:17,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:19:17,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:19:17,139 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:19:17,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:19:17,147 INFO L82 PathProgramCache]: Analyzing trace with hash 15046954, now seen corresponding path program 1 times [2020-10-26 23:19:17,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:19:17,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147717514] [2020-10-26 23:19:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:19:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:17,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:18,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:18,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 23:19:18,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:18,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-26 23:19:18,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:18,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:19:18,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:19:18,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 23:19:18,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 23:19:18,345 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:19:18,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:19:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:18,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:18,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:18,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:19:18,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:18,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 23:19:18,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:19:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:19:18,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:19:18,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:19:18,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147717514] [2020-10-26 23:19:18,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:19:18,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 23:19:18,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857856779] [2020-10-26 23:19:18,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:19:18,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:19:18,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:19:18,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:19:18,446 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 5 states. [2020-10-26 23:19:18,629 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:19:19,496 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:19:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:19:50,809 INFO L93 Difference]: Finished difference Result 4155 states and 7727 transitions. [2020-10-26 23:19:50,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 23:19:50,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-10-26 23:19:50,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:19:50,867 INFO L225 Difference]: With dead ends: 4155 [2020-10-26 23:19:50,867 INFO L226 Difference]: Without dead ends: 2934 [2020-10-26 23:19:50,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:19:50,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2020-10-26 23:19:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2813. [2020-10-26 23:19:51,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2813 states. [2020-10-26 23:19:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2813 states to 2813 states and 4743 transitions. [2020-10-26 23:19:51,127 INFO L78 Accepts]: Start accepts. Automaton has 2813 states and 4743 transitions. Word has length 53 [2020-10-26 23:19:51,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:19:51,130 INFO L481 AbstractCegarLoop]: Abstraction has 2813 states and 4743 transitions. [2020-10-26 23:19:51,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:19:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2813 states and 4743 transitions. [2020-10-26 23:19:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-26 23:19:51,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:19:51,147 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:19:51,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:19:51,149 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:19:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:19:51,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1897405285, now seen corresponding path program 1 times [2020-10-26 23:19:51,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:19:51,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875102361] [2020-10-26 23:19:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:19:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:51,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:51,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:52,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:52,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 23:19:52,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:19:52,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1723 [2020-10-26 23:19:52,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:52,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:19:52,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:19:52,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 23:19:52,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 23:19:53,136 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:19:53,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:19:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:53,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:53,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:53,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:19:53,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:53,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 23:19:53,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:53,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:19:53,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:19:53,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:19:53,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:19:53,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:19:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:19:53,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:19:53,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:19:53,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 23:19:53,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:19:53,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-26 23:19:53,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:19:53,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:19:53,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:19:53,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 23:19:53,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:19:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:19:53,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875102361] [2020-10-26 23:19:53,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:19:53,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:19:53,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336031336] [2020-10-26 23:19:53,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:19:53,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:19:53,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:19:53,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:19:53,704 INFO L87 Difference]: Start difference. First operand 2813 states and 4743 transitions. Second operand 7 states. [2020-10-26 23:19:53,869 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:19:56,621 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:20:29,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:20:29,342 INFO L93 Difference]: Finished difference Result 8416 states and 14306 transitions. [2020-10-26 23:20:29,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:20:29,343 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 138 [2020-10-26 23:20:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:20:29,387 INFO L225 Difference]: With dead ends: 8416 [2020-10-26 23:20:29,387 INFO L226 Difference]: Without dead ends: 5609 [2020-10-26 23:20:29,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:20:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5609 states. [2020-10-26 23:20:29,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5609 to 5478. [2020-10-26 23:20:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5478 states. [2020-10-26 23:20:29,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 8470 transitions. [2020-10-26 23:20:29,582 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 8470 transitions. Word has length 138 [2020-10-26 23:20:29,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:20:29,583 INFO L481 AbstractCegarLoop]: Abstraction has 5478 states and 8470 transitions. [2020-10-26 23:20:29,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:20:29,583 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 8470 transitions. [2020-10-26 23:20:29,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-26 23:20:29,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:20:29,586 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:20:29,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:20:29,587 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:20:29,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:20:29,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1613258661, now seen corresponding path program 1 times [2020-10-26 23:20:29,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:20:29,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344135564] [2020-10-26 23:20:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:20:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:29,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:30,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:30,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:30,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-26 23:20:30,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:20:30,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1233 [2020-10-26 23:20:30,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:30,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:20:30,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:20:30,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-26 23:20:30,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:31,061 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:20:31,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:20:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:31,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:31,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:31,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:20:31,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:31,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 23:20:31,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:31,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:20:31,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:20:31,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:20:31,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:31,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:20:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:20:31,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:20:31,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:20:31,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 23:20:31,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:20:31,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-26 23:20:31,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:20:31,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:20:31,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:20:31,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-26 23:20:31,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:20:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:20:31,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344135564] [2020-10-26 23:20:31,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:20:31,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:20:31,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270159434] [2020-10-26 23:20:31,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:20:31,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:20:31,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:20:31,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:20:31,598 INFO L87 Difference]: Start difference. First operand 5478 states and 8470 transitions. Second operand 7 states. [2020-10-26 23:20:31,805 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:20:33,519 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 23:21:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:21:05,197 INFO L93 Difference]: Finished difference Result 13693 states and 21794 transitions. [2020-10-26 23:21:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:21:05,203 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2020-10-26 23:21:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:21:05,252 INFO L225 Difference]: With dead ends: 13693 [2020-10-26 23:21:05,253 INFO L226 Difference]: Without dead ends: 8221 [2020-10-26 23:21:05,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:21:05,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8221 states. [2020-10-26 23:21:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8221 to 8025. [2020-10-26 23:21:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8025 states. [2020-10-26 23:21:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8025 states to 8025 states and 11140 transitions. [2020-10-26 23:21:05,513 INFO L78 Accepts]: Start accepts. Automaton has 8025 states and 11140 transitions. Word has length 154 [2020-10-26 23:21:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:21:05,513 INFO L481 AbstractCegarLoop]: Abstraction has 8025 states and 11140 transitions. [2020-10-26 23:21:05,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:21:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 8025 states and 11140 transitions. [2020-10-26 23:21:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-26 23:21:05,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:21:05,521 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:21:05,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:21:05,522 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:21:05,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:21:05,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1718744159, now seen corresponding path program 1 times [2020-10-26 23:21:05,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:21:05,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397890886] [2020-10-26 23:21:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:21:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:21:05,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:21:05,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:21:07,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:21:07,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-26 23:21:07,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:21:07,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1821 [2020-10-26 23:21:07,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:21:07,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:21:07,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:21:07,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-26 23:21:07,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:21:07,615 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:21:07,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:21:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:21:07,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:21:07,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:21:07,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:21:07,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:21:07,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 23:21:07,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:21:07,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:21:07,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:21:07,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:21:07,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:21:07,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:21:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:21:07,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:21:07,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:21:07,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 23:21:07,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:21:07,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-26 23:21:07,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:21:07,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:21:07,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:21:07,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 23:21:07,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:21:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:21:08,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397890886] [2020-10-26 23:21:08,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:21:08,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 23:21:08,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126735604] [2020-10-26 23:21:08,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 23:21:08,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:21:08,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 23:21:08,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 23:21:08,152 INFO L87 Difference]: Start difference. First operand 8025 states and 11140 transitions. Second operand 8 states. [2020-10-26 23:21:08,362 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 23:21:11,293 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-10-26 23:21:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:21:45,678 INFO L93 Difference]: Finished difference Result 16295 states and 22700 transitions. [2020-10-26 23:21:45,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:21:45,681 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 168 [2020-10-26 23:21:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:21:45,737 INFO L225 Difference]: With dead ends: 16295 [2020-10-26 23:21:45,737 INFO L226 Difference]: Without dead ends: 8276 [2020-10-26 23:21:45,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:21:45,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2020-10-26 23:21:46,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 8072. [2020-10-26 23:21:46,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-10-26 23:21:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 11192 transitions. [2020-10-26 23:21:46,039 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 11192 transitions. Word has length 168 [2020-10-26 23:21:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:21:46,041 INFO L481 AbstractCegarLoop]: Abstraction has 8072 states and 11192 transitions. [2020-10-26 23:21:46,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 23:21:46,042 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 11192 transitions. [2020-10-26 23:21:46,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-26 23:21:46,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:21:46,045 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:21:46,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:21:46,045 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:21:46,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:21:46,046 INFO L82 PathProgramCache]: Analyzing trace with hash 122433700, now seen corresponding path program 1 times [2020-10-26 23:21:46,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:21:46,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286181831] [2020-10-26 23:21:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:21:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:21:46,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:21:46,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:21:46,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-26 23:21:46,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:21:46,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-26 23:21:46,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:21:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:21:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-26 23:21:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 23:21:46,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:21:46,686 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:21:46,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:21:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:21:46,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:21:46,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:21:46,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:21:46,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:21:46,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 23:21:46,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:21:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:21:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:21:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:21:46,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:21:46,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:21:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:21:46,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:21:46,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:21:46,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:21:46,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:21:46,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 23:21:46,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:21:46,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:21:46,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:21:46,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 23:21:46,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:21:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:21:47,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286181831] [2020-10-26 23:21:47,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:21:47,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 23:21:47,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457910445] [2020-10-26 23:21:47,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:21:47,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:21:47,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:21:47,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:21:47,035 INFO L87 Difference]: Start difference. First operand 8072 states and 11192 transitions. Second operand 5 states. [2020-10-26 23:21:48,378 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 23:22:17,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:22:17,105 INFO L93 Difference]: Finished difference Result 15572 states and 23869 transitions. [2020-10-26 23:22:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:22:17,111 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2020-10-26 23:22:17,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:22:17,154 INFO L225 Difference]: With dead ends: 15572 [2020-10-26 23:22:17,154 INFO L226 Difference]: Without dead ends: 11621 [2020-10-26 23:22:17,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:22:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11621 states. [2020-10-26 23:22:17,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11621 to 11591. [2020-10-26 23:22:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11591 states. [2020-10-26 23:22:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11591 states to 11591 states and 15580 transitions. [2020-10-26 23:22:17,486 INFO L78 Accepts]: Start accepts. Automaton has 11591 states and 15580 transitions. Word has length 182 [2020-10-26 23:22:17,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:22:17,487 INFO L481 AbstractCegarLoop]: Abstraction has 11591 states and 15580 transitions. [2020-10-26 23:22:17,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:22:17,488 INFO L276 IsEmpty]: Start isEmpty. Operand 11591 states and 15580 transitions. [2020-10-26 23:22:17,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-26 23:22:17,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:22:17,494 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:22:17,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:22:17,494 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:22:17,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:22:17,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1581740411, now seen corresponding path program 1 times [2020-10-26 23:22:17,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:22:17,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004986321] [2020-10-26 23:22:17,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:22:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:22:17,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:17,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:17,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:18,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:19,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:21,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:22:21,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 268 [2020-10-26 23:22:21,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 23:22:21,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4034 [2020-10-26 23:22:21,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:22:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:22:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:22:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-26 23:22:21,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:22:21,802 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:22:21,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:22:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:22:21,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:21,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:22:21,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:22:21,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:22:21,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:22:21,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:22:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:22:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:22:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:22:21,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:22:21,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:22:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:22:21,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:22,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:22,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:22:22,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:22:22,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:22:22,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-10-26 23:22:22,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:22:22,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:22:22,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:22:22,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:22:22,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:22:22,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:22:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:22:22,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:22,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:22:22,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 23:22:22,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:22:22,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-26 23:22:22,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:22:22,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:22:22,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:22:22,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-26 23:22:22,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:22:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-26 23:22:22,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004986321] [2020-10-26 23:22:22,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:22:22,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:22:22,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760713728] [2020-10-26 23:22:22,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:22:22,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:22:22,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:22:22,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:22:22,734 INFO L87 Difference]: Start difference. First operand 11591 states and 15580 transitions. Second operand 7 states. [2020-10-26 23:22:22,930 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 23:22:26,563 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 23:22:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:22:53,199 INFO L93 Difference]: Finished difference Result 31983 states and 44955 transitions. [2020-10-26 23:22:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:22:53,204 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 254 [2020-10-26 23:22:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:22:53,275 INFO L225 Difference]: With dead ends: 31983 [2020-10-26 23:22:53,275 INFO L226 Difference]: Without dead ends: 21204 [2020-10-26 23:22:53,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 23:22:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21204 states. [2020-10-26 23:22:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21204 to 21067. [2020-10-26 23:22:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21067 states. [2020-10-26 23:22:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21067 states to 21067 states and 26958 transitions. [2020-10-26 23:22:53,788 INFO L78 Accepts]: Start accepts. Automaton has 21067 states and 26958 transitions. Word has length 254 [2020-10-26 23:22:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:22:53,789 INFO L481 AbstractCegarLoop]: Abstraction has 21067 states and 26958 transitions. [2020-10-26 23:22:53,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:22:53,789 INFO L276 IsEmpty]: Start isEmpty. Operand 21067 states and 26958 transitions. [2020-10-26 23:22:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 23:22:53,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:22:53,795 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:22:53,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:22:53,795 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:22:53,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:22:53,797 INFO L82 PathProgramCache]: Analyzing trace with hash -748171287, now seen corresponding path program 1 times [2020-10-26 23:22:53,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:22:53,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079594281] [2020-10-26 23:22:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:22:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:22:53,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:54,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:55,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:22:55,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 23:22:55,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:22:55,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1694 [2020-10-26 23:22:55,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:22:55,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:22:55,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:22:55,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:22:55,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:22:55,775 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 23:22:55,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:22:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:22:55,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:55,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:22:55,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:22:55,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:22:55,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 23:22:55,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:22:55,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:22:55,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:22:55,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:22:55,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:22:55,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:22:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:22:55,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:55,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:22:55,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:22:55,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:22:55,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-26 23:22:55,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:22:55,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:22:55,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:22:55,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:22:55,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:22:55,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:22:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:22:56,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:22:56,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:22:56,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:22:56,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:22:56,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-26 23:22:56,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:22:56,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:22:56,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:22:56,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:22:56,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:22:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:22:56,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079594281] [2020-10-26 23:22:56,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:22:56,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:22:56,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172236517] [2020-10-26 23:22:56,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:22:56,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:22:56,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:22:56,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:22:56,332 INFO L87 Difference]: Start difference. First operand 21067 states and 26958 transitions. Second operand 7 states. [2020-10-26 23:22:57,588 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 66