/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:11:39,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:11:39,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:11:39,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:11:39,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:11:39,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:11:39,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:11:39,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:11:39,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:11:39,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:11:39,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:11:39,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:11:39,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:11:39,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:11:39,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:11:39,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:11:39,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:11:39,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:11:39,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:11:39,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:11:39,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:11:39,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:11:39,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:11:39,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:11:39,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:11:39,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:11:39,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:11:39,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:11:39,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:11:39,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:11:39,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:11:39,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:11:39,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:11:39,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:11:39,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:11:39,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:11:39,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:11:39,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:11:39,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:11:39,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:11:39,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:11:39,592 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:11:39,621 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:11:39,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:11:39,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:11:39,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:11:39,623 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:11:39,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:11:39,624 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:11:39,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:11:39,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:11:39,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:11:39,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:11:39,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:11:39,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:11:39,625 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:11:39,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:11:39,626 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:11:39,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:11:39,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:11:39,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:11:39,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:11:39,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:11:39,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:11:39,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:11:39,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:11:39,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:11:39,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:11:39,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:11:39,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:11:39,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:11:39,628 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:11:39,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:11:40,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:11:40,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:11:40,018 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:11:40,018 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:11:40,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label35.c [2020-10-28 14:11:40,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/967073335/f00ef2ccb0864ba19e08169e505093a5/FLAG0c57170e5 [2020-10-28 14:11:41,405 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:11:41,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label35.c [2020-10-28 14:11:41,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/967073335/f00ef2ccb0864ba19e08169e505093a5/FLAG0c57170e5 [2020-10-28 14:11:41,662 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/967073335/f00ef2ccb0864ba19e08169e505093a5 [2020-10-28 14:11:41,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:11:41,675 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:11:41,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:11:41,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:11:41,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:11:41,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:11:41" (1/1) ... [2020-10-28 14:11:41,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3387b0c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:41, skipping insertion in model container [2020-10-28 14:11:41,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:11:41" (1/1) ... [2020-10-28 14:11:41,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:11:41,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:11:43,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:11:43,980 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:11:45,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:11:45,254 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:11:45,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:45 WrapperNode [2020-10-28 14:11:45,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:11:45,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:11:45,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:11:45,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:11:45,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:45" (1/1) ... [2020-10-28 14:11:45,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:45" (1/1) ... [2020-10-28 14:11:45,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:45" (1/1) ... [2020-10-28 14:11:45,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:45" (1/1) ... [2020-10-28 14:11:45,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:45" (1/1) ... [2020-10-28 14:11:45,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:45" (1/1) ... [2020-10-28 14:11:45,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:45" (1/1) ... [2020-10-28 14:11:45,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:11:45,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:11:45,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:11:45,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:11:45,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:11:45,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:11:45,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:11:45,977 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:11:45,977 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:11:45,978 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:11:45,978 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:11:45,978 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:11:45,978 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:11:45,978 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:11:45,978 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:11:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:11:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:11:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:11:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:11:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:11:45,979 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:11:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:11:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:11:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:11:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:11:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:11:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:11:45,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:11:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:11:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:11:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:11:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:11:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:11:45,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:12:01,588 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:12:01,588 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:12:01,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:12:01 BoogieIcfgContainer [2020-10-28 14:12:01,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:12:01,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:12:01,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:12:01,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:12:01,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:11:41" (1/3) ... [2020-10-28 14:12:01,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c9faa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:12:01, skipping insertion in model container [2020-10-28 14:12:01,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:45" (2/3) ... [2020-10-28 14:12:01,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c9faa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:12:01, skipping insertion in model container [2020-10-28 14:12:01,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:12:01" (3/3) ... [2020-10-28 14:12:01,603 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label35.c [2020-10-28 14:12:01,614 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:12:01,621 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:12:01,634 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:12:01,670 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:12:01,670 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:12:01,670 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:12:01,670 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:12:01,670 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:12:01,670 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:12:01,671 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:12:01,671 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:12:01,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:12:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:12:01,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:12:01,726 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] [2020-10-28 14:12:01,727 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:12:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:12:01,739 INFO L82 PathProgramCache]: Analyzing trace with hash -471046451, now seen corresponding path program 1 times [2020-10-28 14:12:01,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:12:01,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801240877] [2020-10-28 14:12:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:12:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:01,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:02,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:02,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:12:02,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:02,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-28 14:12:02,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:02,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:02,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:12:02,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:12:02,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 14:12:02,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:12:02,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:12:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:02,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:02,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:02,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:12:02,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:02,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 14:12:02,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:02,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:02,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:12:02,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:12:02,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:12:02,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:12:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:12:02,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801240877] [2020-10-28 14:12:02,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:12:02,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:12:02,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327284111] [2020-10-28 14:12:02,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:12:02,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:12:02,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:12:02,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:12:02,801 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-28 14:12:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:12:39,279 INFO L93 Difference]: Finished difference Result 5062 states and 9524 transitions. [2020-10-28 14:12:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:12:39,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-10-28 14:12:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:12:39,329 INFO L225 Difference]: With dead ends: 5062 [2020-10-28 14:12:39,329 INFO L226 Difference]: Without dead ends: 3201 [2020-10-28 14:12:39,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:12:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2020-10-28 14:12:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 3153. [2020-10-28 14:12:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3153 states. [2020-10-28 14:12:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 5020 transitions. [2020-10-28 14:12:39,588 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 5020 transitions. Word has length 46 [2020-10-28 14:12:39,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:12:39,589 INFO L481 AbstractCegarLoop]: Abstraction has 3153 states and 5020 transitions. [2020-10-28 14:12:39,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:12:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 5020 transitions. [2020-10-28 14:12:39,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 14:12:39,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:12:39,596 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:12:39,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:12:39,596 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:12:39,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:12:39,597 INFO L82 PathProgramCache]: Analyzing trace with hash -247954374, now seen corresponding path program 1 times [2020-10-28 14:12:39,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:12:39,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446342066] [2020-10-28 14:12:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:12:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:39,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:39,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:40,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:40,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:41,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:41,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 14:12:41,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:12:41,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1604 [2020-10-28 14:12:41,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:41,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:41,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:12:41,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 14:12:41,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:12:41,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:12:41,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:12:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:41,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:41,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:41,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:12:41,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:41,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:12:41,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:41,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:41,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:12:41,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:12:41,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:12:41,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:12:41,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:12:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:41,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:41,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:41,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 14:12:41,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:41,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 14:12:41,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:41,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:41,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:12:41,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-28 14:12:41,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:12:41,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:12:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:12:41,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446342066] [2020-10-28 14:12:41,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:12:41,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:12:41,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292545938] [2020-10-28 14:12:41,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:12:41,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:12:41,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:12:41,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:12:41,605 INFO L87 Difference]: Start difference. First operand 3153 states and 5020 transitions. Second operand 5 states. [2020-10-28 14:13:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:13:12,283 INFO L93 Difference]: Finished difference Result 9267 states and 14844 transitions. [2020-10-28 14:13:12,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:13:12,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-10-28 14:13:12,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:13:12,324 INFO L225 Difference]: With dead ends: 9267 [2020-10-28 14:13:12,325 INFO L226 Difference]: Without dead ends: 6120 [2020-10-28 14:13:12,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:13:12,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6120 states. [2020-10-28 14:13:12,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6120 to 6054. [2020-10-28 14:13:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6054 states. [2020-10-28 14:13:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6054 states to 6054 states and 9061 transitions. [2020-10-28 14:13:12,528 INFO L78 Accepts]: Start accepts. Automaton has 6054 states and 9061 transitions. Word has length 117 [2020-10-28 14:13:12,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:13:12,529 INFO L481 AbstractCegarLoop]: Abstraction has 6054 states and 9061 transitions. [2020-10-28 14:13:12,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:13:12,529 INFO L276 IsEmpty]: Start isEmpty. Operand 6054 states and 9061 transitions. [2020-10-28 14:13:12,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 14:13:12,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:13:12,534 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:13:12,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:13:12,534 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:13:12,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:13:12,535 INFO L82 PathProgramCache]: Analyzing trace with hash 645531964, now seen corresponding path program 1 times [2020-10-28 14:13:12,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:13:12,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102784168] [2020-10-28 14:13:12,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:13:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:12,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:12,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:13,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:13,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 14:13:13,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:13:13,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1032 [2020-10-28 14:13:13,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:13,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:13,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:13:13,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:13:13,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 14:13:13,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:13:13,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:13:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:13,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:13,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:13,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:13:13,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:13:13,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:13:13,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:13,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:13,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:13:13,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:13:13,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:13:13,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:13:13,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:13:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:13,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:13,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:13,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 14:13:13,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:13:13,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-28 14:13:13,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:13,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:13,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:13:13,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:13:13,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 14:13:13,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:13:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:13:14,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102784168] [2020-10-28 14:13:14,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:13:14,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:13:14,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780486899] [2020-10-28 14:13:14,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:13:14,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:13:14,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:13:14,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:13:14,003 INFO L87 Difference]: Start difference. First operand 6054 states and 9061 transitions. Second operand 8 states. [2020-10-28 14:14:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:14:23,729 INFO L93 Difference]: Finished difference Result 23678 states and 36349 transitions. [2020-10-28 14:14:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:14:23,733 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2020-10-28 14:14:23,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:14:23,866 INFO L225 Difference]: With dead ends: 23678 [2020-10-28 14:14:23,866 INFO L226 Difference]: Without dead ends: 17630 [2020-10-28 14:14:23,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:14:23,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17630 states. [2020-10-28 14:14:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17630 to 17567. [2020-10-28 14:14:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17567 states. [2020-10-28 14:14:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17567 states to 17567 states and 24780 transitions. [2020-10-28 14:14:24,446 INFO L78 Accepts]: Start accepts. Automaton has 17567 states and 24780 transitions. Word has length 117 [2020-10-28 14:14:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:14:24,449 INFO L481 AbstractCegarLoop]: Abstraction has 17567 states and 24780 transitions. [2020-10-28 14:14:24,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:14:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 17567 states and 24780 transitions. [2020-10-28 14:14:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 14:14:24,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:14:24,463 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:14:24,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:14:24,464 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:14:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:14:24,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1544869912, now seen corresponding path program 1 times [2020-10-28 14:14:24,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:14:24,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861969738] [2020-10-28 14:14:24,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:14:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:24,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:24,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:25,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:25,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 14:14:25,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:14:25,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 880 [2020-10-28 14:14:25,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:25,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:25,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:14:25,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:14:25,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 14:14:25,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:14:25,560 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:14:25,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:14:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:25,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:25,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:25,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:14:25,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:14:25,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:14:25,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:25,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:25,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:14:25,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:14:25,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:14:25,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:14:25,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:14:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:25,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:25,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:25,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 14:14:25,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:14:25,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-28 14:14:25,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:25,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:25,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:14:25,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:14:25,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 14:14:25,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:14:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:14:25,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861969738] [2020-10-28 14:14:25,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:14:25,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:14:25,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277431360] [2020-10-28 14:14:25,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:14:25,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:14:25,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:14:25,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:14:25,915 INFO L87 Difference]: Start difference. First operand 17567 states and 24780 transitions. Second operand 7 states. [2020-10-28 14:14:26,082 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:15:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:15:18,582 INFO L93 Difference]: Finished difference Result 44268 states and 65236 transitions. [2020-10-28 14:15:18,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:15:18,585 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 127 [2020-10-28 14:15:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:15:18,676 INFO L225 Difference]: With dead ends: 44268 [2020-10-28 14:15:18,676 INFO L226 Difference]: Without dead ends: 26707 [2020-10-28 14:15:18,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:15:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26707 states. [2020-10-28 14:15:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26707 to 26347. [2020-10-28 14:15:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26347 states. [2020-10-28 14:15:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26347 states to 26347 states and 37846 transitions. [2020-10-28 14:15:19,327 INFO L78 Accepts]: Start accepts. Automaton has 26347 states and 37846 transitions. Word has length 127 [2020-10-28 14:15:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:15:19,329 INFO L481 AbstractCegarLoop]: Abstraction has 26347 states and 37846 transitions. [2020-10-28 14:15:19,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:15:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 26347 states and 37846 transitions. [2020-10-28 14:15:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-28 14:15:19,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:15:19,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:15:19,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:15:19,332 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:15:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:15:19,333 INFO L82 PathProgramCache]: Analyzing trace with hash 997929922, now seen corresponding path program 1 times [2020-10-28 14:15:19,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:15:19,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007183859] [2020-10-28 14:15:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:15:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:19,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:19,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:20,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:21,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:21,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 14:15:21,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:15:21,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2253 [2020-10-28 14:15:21,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:21,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:21,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:15:21,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:15:21,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 14:15:21,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:15:21,808 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:15:21,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:15:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:21,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:21,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:21,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:15:21,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:15:21,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 14:15:21,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:21,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:21,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:15:21,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:15:21,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:15:21,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:15:21,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:15:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:21,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:22,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:22,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:15:22,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:15:22,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-28 14:15:22,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:22,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:15:22,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:15:22,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 14:15:22,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:15:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:15:22,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007183859] [2020-10-28 14:15:22,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:15:22,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:15:22,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583652270] [2020-10-28 14:15:22,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:15:22,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:15:22,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:15:22,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:15:22,237 INFO L87 Difference]: Start difference. First operand 26347 states and 37846 transitions. Second operand 7 states. [2020-10-28 14:15:22,390 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68