/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/Problem19_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:37:30,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:37:30,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:37:30,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:37:30,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:37:30,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:37:30,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:37:30,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:37:30,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:37:30,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:37:30,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:37:30,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:37:30,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:37:30,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:37:30,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:37:30,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:37:30,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:37:30,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:37:30,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:37:30,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:37:30,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:37:30,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:37:30,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:37:30,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:37:30,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:37:30,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:37:30,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:37:30,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:37:30,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:37:30,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:37:30,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:37:30,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:37:30,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:37:30,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:37:30,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:37:30,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:37:30,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:37:30,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:37:30,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:37:30,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:37:30,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:37:30,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 00:37:30,541 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:37:30,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:37:30,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:37:30,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:37:30,547 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:37:30,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:37:30,547 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:37:30,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:37:30,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:37:30,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:37:30,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:37:30,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:37:30,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:37:30,549 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:37:30,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:37:30,550 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:37:30,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:37:30,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:37:30,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:37:30,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:37:30,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:37:30,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:37:30,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:37:30,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:37:30,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:37:30,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:37:30,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:37:30,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:37:30,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:37:30,552 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:37:30,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:37:31,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:37:31,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:37:31,048 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:37:31,049 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:37:31,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label03.c [2020-10-27 00:37:31,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b4397f6a/1e73c13b680541839602e66f65479c52/FLAG13f82db0d [2020-10-27 00:37:32,343 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:37:32,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label03.c [2020-10-27 00:37:32,404 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b4397f6a/1e73c13b680541839602e66f65479c52/FLAG13f82db0d [2020-10-27 00:37:32,625 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b4397f6a/1e73c13b680541839602e66f65479c52 [2020-10-27 00:37:32,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:37:32,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:37:32,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:37:32,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:37:32,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:37:32,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:37:32" (1/1) ... [2020-10-27 00:37:32,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7afc6b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:32, skipping insertion in model container [2020-10-27 00:37:32,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:37:32" (1/1) ... [2020-10-27 00:37:32,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:37:32,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:37:35,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:37:35,044 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:37:36,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:37:36,401 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:37:36,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:36 WrapperNode [2020-10-27 00:37:36,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:37:36,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:37:36,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:37:36,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:37:36,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:36" (1/1) ... [2020-10-27 00:37:36,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:36" (1/1) ... [2020-10-27 00:37:36,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:36" (1/1) ... [2020-10-27 00:37:36,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:36" (1/1) ... [2020-10-27 00:37:36,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:36" (1/1) ... [2020-10-27 00:37:36,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:36" (1/1) ... [2020-10-27 00:37:37,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:36" (1/1) ... [2020-10-27 00:37:37,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:37:37,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:37:37,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:37:37,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:37:37,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:37:37,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:37:37,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:37:37,168 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:37:37,168 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:37:37,169 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:37:37,169 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:37:37,169 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:37:37,169 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:37:37,169 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:37:37,169 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:37:37,170 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:37:37,170 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:37:37,170 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:37:37,170 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:37:37,170 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:37:37,171 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:37:37,171 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:37:37,171 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:37:37,171 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:37:37,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:37:37,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:37:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:37:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:37:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:37:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:37:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:37:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:37:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:37:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:37:52,838 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:37:52,840 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:37:52,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:37:52 BoogieIcfgContainer [2020-10-27 00:37:52,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:37:52,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:37:52,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:37:52,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:37:52,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:37:32" (1/3) ... [2020-10-27 00:37:52,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a262638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:37:52, skipping insertion in model container [2020-10-27 00:37:52,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:36" (2/3) ... [2020-10-27 00:37:52,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a262638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:37:52, skipping insertion in model container [2020-10-27 00:37:52,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:37:52" (3/3) ... [2020-10-27 00:37:52,858 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label03.c [2020-10-27 00:37:52,870 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:37:52,876 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:37:52,888 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:37:52,928 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:37:52,928 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:37:52,928 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:37:52,928 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:37:52,929 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:37:52,929 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:37:52,929 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:37:52,929 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:37:52,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:37:52,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 00:37:52,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:37:52,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:37:52,998 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:37:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:37:53,012 INFO L82 PathProgramCache]: Analyzing trace with hash -677281995, now seen corresponding path program 1 times [2020-10-27 00:37:53,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:37:53,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621005591] [2020-10-27 00:37:53,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:37:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:37:53,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:37:54,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:37:54,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:37:54,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:37:54,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 809 [2020-10-27 00:37:54,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:37:54,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:37:54,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:37:54,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 00:37:54,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:37:54,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:37:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:37:54,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:37:54,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:37:54,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:37:54,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:37:54,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-27 00:37:54,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:37:54,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:37:54,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:37:54,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:37:54,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:37:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:37:54,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621005591] [2020-10-27 00:37:54,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:37:54,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:37:54,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651191479] [2020-10-27 00:37:54,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:37:54,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:37:54,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:37:54,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:37:54,508 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:38:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:38:22,943 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-27 00:38:22,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:38:22,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-27 00:38:22,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:38:23,007 INFO L225 Difference]: With dead ends: 5116 [2020-10-27 00:38:23,007 INFO L226 Difference]: Without dead ends: 3271 [2020-10-27 00:38:23,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:38:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-27 00:38:23,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-27 00:38:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-27 00:38:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-27 00:38:23,359 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 64 [2020-10-27 00:38:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:38:23,361 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-27 00:38:23,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:38:23,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-27 00:38:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 00:38:23,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:38:23,377 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, 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] [2020-10-27 00:38:23,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:38:23,378 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:38:23,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:38:23,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1799345285, now seen corresponding path program 1 times [2020-10-27 00:38:23,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:38:23,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442071465] [2020-10-27 00:38:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:38:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:23,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:24,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:24,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:24,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-27 00:38:24,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:38:24,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1199 [2020-10-27 00:38:24,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:38:24,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:38:24,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:38:24,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:38:24,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:38:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:24,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:24,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:24,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:38:24,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:38:24,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 00:38:24,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:24,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:38:24,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:38:24,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:38:24,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:38:24,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:38:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:24,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:25,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:25,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 00:38:25,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:38:25,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 00:38:25,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:25,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:38:25,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:38:25,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:38:25,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:38:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:38:25,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442071465] [2020-10-27 00:38:25,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:38:25,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:38:25,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91180236] [2020-10-27 00:38:25,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:38:25,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:38:25,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:38:25,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:38:25,197 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 7 states. [2020-10-27 00:39:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:39:08,299 INFO L93 Difference]: Finished difference Result 9569 states and 16489 transitions. [2020-10-27 00:39:08,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:39:08,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 136 [2020-10-27 00:39:08,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:39:08,339 INFO L225 Difference]: With dead ends: 9569 [2020-10-27 00:39:08,340 INFO L226 Difference]: Without dead ends: 6375 [2020-10-27 00:39:08,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:39:08,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2020-10-27 00:39:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6257. [2020-10-27 00:39:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6257 states. [2020-10-27 00:39:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6257 states to 6257 states and 10367 transitions. [2020-10-27 00:39:08,683 INFO L78 Accepts]: Start accepts. Automaton has 6257 states and 10367 transitions. Word has length 136 [2020-10-27 00:39:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:39:08,684 INFO L481 AbstractCegarLoop]: Abstraction has 6257 states and 10367 transitions. [2020-10-27 00:39:08,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:39:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 6257 states and 10367 transitions. [2020-10-27 00:39:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-27 00:39:08,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:39:08,687 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:39:08,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:39:08,688 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:39:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:39:08,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1537118068, now seen corresponding path program 1 times [2020-10-27 00:39:08,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:39:08,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513930760] [2020-10-27 00:39:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:39:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:08,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:09,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:09,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:09,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:09,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 00:39:09,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:39:09,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1243 [2020-10-27 00:39:09,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:39:09,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:39:09,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-27 00:39:09,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:39:10,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:39:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:10,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:10,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:10,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:39:10,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:39:10,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:39:10,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:10,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:39:10,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:39:10,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:39:10,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:39:10,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:39:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:10,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:10,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:10,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:10,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:39:10,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:39:10,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-27 00:39:10,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:10,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:39:10,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:39:10,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:39:10,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:39:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:39:10,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513930760] [2020-10-27 00:39:10,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:39:10,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:39:10,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73256177] [2020-10-27 00:39:10,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:39:10,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:39:10,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:39:10,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:39:10,557 INFO L87 Difference]: Start difference. First operand 6257 states and 10367 transitions. Second operand 7 states. [2020-10-27 00:40:04,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:40:04,152 INFO L93 Difference]: Finished difference Result 24023 states and 40903 transitions. [2020-10-27 00:40:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 00:40:04,156 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 139 [2020-10-27 00:40:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:40:04,261 INFO L225 Difference]: With dead ends: 24023 [2020-10-27 00:40:04,261 INFO L226 Difference]: Without dead ends: 17772 [2020-10-27 00:40:04,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:40:04,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17772 states. [2020-10-27 00:40:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17772 to 17756. [2020-10-27 00:40:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17756 states. [2020-10-27 00:40:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17756 states to 17756 states and 27518 transitions. [2020-10-27 00:40:04,827 INFO L78 Accepts]: Start accepts. Automaton has 17756 states and 27518 transitions. Word has length 139 [2020-10-27 00:40:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:40:04,829 INFO L481 AbstractCegarLoop]: Abstraction has 17756 states and 27518 transitions. [2020-10-27 00:40:04,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:40:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 17756 states and 27518 transitions. [2020-10-27 00:40:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 00:40:04,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:40:04,840 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, 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] [2020-10-27 00:40:04,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:40:04,840 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:40:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:40:04,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1917544502, now seen corresponding path program 1 times [2020-10-27 00:40:04,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:40:04,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649993812] [2020-10-27 00:40:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:40:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:04,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:05,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:06,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:07,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:07,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 00:40:07,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:40:07,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2119 [2020-10-27 00:40:07,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:07,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:40:07,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:40:07,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:40:07,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:07,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:40:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:07,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:07,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:07,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:40:07,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:07,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 00:40:07,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:40:07,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:40:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:40:07,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:07,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:40:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:07,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:07,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:07,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:40:07,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:07,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-27 00:40:07,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:07,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:40:07,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:40:07,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:40:07,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:40:07,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649993812] [2020-10-27 00:40:07,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:40:07,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:40:07,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700940628] [2020-10-27 00:40:07,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:40:07,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:40:07,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:40:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:40:07,594 INFO L87 Difference]: Start difference. First operand 17756 states and 27518 transitions. Second operand 7 states. [2020-10-27 00:41:06,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:41:06,477 INFO L93 Difference]: Finished difference Result 54053 states and 86219 transitions. [2020-10-27 00:41:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:41:06,481 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 165 [2020-10-27 00:41:06,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:41:06,633 INFO L225 Difference]: With dead ends: 54053 [2020-10-27 00:41:06,633 INFO L226 Difference]: Without dead ends: 36303 [2020-10-27 00:41:06,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:41:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36303 states. [2020-10-27 00:41:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36303 to 31503. [2020-10-27 00:41:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31503 states. [2020-10-27 00:41:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31503 states to 31503 states and 44967 transitions. [2020-10-27 00:41:07,758 INFO L78 Accepts]: Start accepts. Automaton has 31503 states and 44967 transitions. Word has length 165 [2020-10-27 00:41:07,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:41:07,760 INFO L481 AbstractCegarLoop]: Abstraction has 31503 states and 44967 transitions. [2020-10-27 00:41:07,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:41:07,761 INFO L276 IsEmpty]: Start isEmpty. Operand 31503 states and 44967 transitions. [2020-10-27 00:41:07,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2020-10-27 00:41:07,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:41:07,771 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:41:07,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:41:07,771 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:41:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:41:07,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1098464339, now seen corresponding path program 1 times [2020-10-27 00:41:07,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:41:07,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905440790] [2020-10-27 00:41:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:41:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:07,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:08,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:10,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:12,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:12,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 401 [2020-10-27 00:41:12,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:41:12,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 00:41:12,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:12,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:41:12,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:41:12,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 243 [2020-10-27 00:41:12,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:13,099 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:41:13,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:41:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:13,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:13,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:13,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:41:13,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:13,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 00:41:13,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:13,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:41:13,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:41:13,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:41:13,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:13,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:41:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:13,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:13,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:13,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-27 00:41:13,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:13,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-27 00:41:13,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:13,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:41:13,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:41:13,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-27 00:41:13,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:13,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-10-27 00:41:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:13,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:14,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:14,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:41:14,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:14,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 00:41:14,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:14,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:41:14,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 00:41:14,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:41:14,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 112 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:41:14,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905440790] [2020-10-27 00:41:14,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:41:14,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:41:14,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324050362] [2020-10-27 00:41:14,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:41:14,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:41:14,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:41:14,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:41:14,259 INFO L87 Difference]: Start difference. First operand 31503 states and 44967 transitions. Second operand 7 states. [2020-10-27 00:41:14,420 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66