/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=DEEPEST --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_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:23:03,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:23:03,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:23:03,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:23:03,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:23:03,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:23:03,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:23:03,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:23:03,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:23:03,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:23:03,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:23:03,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:23:03,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:23:03,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:23:03,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:23:03,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:23:03,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:23:03,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:23:03,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:23:03,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:23:03,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:23:03,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:23:03,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:23:03,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:23:03,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:23:03,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:23:03,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:23:03,243 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:23:03,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:23:03,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:23:03,245 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:23:03,246 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:23:03,247 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:23:03,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:23:03,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:23:03,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:23:03,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:23:03,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:23:03,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:23:03,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:23:03,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:23:03,254 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 19:23:03,282 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:23:03,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:23:03,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:23:03,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:23:03,284 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:23:03,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:23:03,285 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:23:03,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:23:03,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:23:03,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:23:03,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:23:03,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:23:03,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:23:03,286 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:23:03,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:23:03,287 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:23:03,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:23:03,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:23:03,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:23:03,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:23:03,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:23:03,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:23:03,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:23:03,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:23:03,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:23:03,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:23:03,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:23:03,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:23:03,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:23:03,290 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:23:03,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:23:03,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:23:03,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:23:03,715 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:23:03,716 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:23:03,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label20.c [2020-10-27 19:23:03,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1f68ba66/a9b0dc8892224355854cccd6db455c67/FLAGce852d6ff [2020-10-27 19:23:05,130 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:23:05,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label20.c [2020-10-27 19:23:05,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1f68ba66/a9b0dc8892224355854cccd6db455c67/FLAGce852d6ff [2020-10-27 19:23:05,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f1f68ba66/a9b0dc8892224355854cccd6db455c67 [2020-10-27 19:23:05,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:23:05,429 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:23:05,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:23:05,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:23:05,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:23:05,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:23:05" (1/1) ... [2020-10-27 19:23:05,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@527493d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:23:05, skipping insertion in model container [2020-10-27 19:23:05,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:23:05" (1/1) ... [2020-10-27 19:23:05,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:23:05,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:23:08,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:23:08,098 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:23:09,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:23:09,329 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:23:09,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:23:09 WrapperNode [2020-10-27 19:23:09,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:23:09,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:23:09,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:23:09,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:23:09,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:23:09" (1/1) ... [2020-10-27 19:23:09,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:23:09" (1/1) ... [2020-10-27 19:23:09,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:23:09" (1/1) ... [2020-10-27 19:23:09,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:23:09" (1/1) ... [2020-10-27 19:23:09,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:23:09" (1/1) ... [2020-10-27 19:23:09,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:23:09" (1/1) ... [2020-10-27 19:23:09,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:23:09" (1/1) ... [2020-10-27 19:23:10,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:23:10,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:23:10,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:23:10,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:23:10,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:23:09" (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 19:23:10,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:23:10,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:23:10,113 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:23:10,113 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:23:10,114 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:23:10,114 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:23:10,114 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:23:10,114 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:23:10,114 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:23:10,114 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:23:10,115 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:23:10,115 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:23:10,115 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:23:10,115 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:23:10,115 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:23:10,115 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:23:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:23:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:23:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:23:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:23:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:23:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:23:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:23:10,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:23:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:23:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:23:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:23:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:23:10,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:23:28,956 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:23:28,956 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:23:28,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:23:28 BoogieIcfgContainer [2020-10-27 19:23:28,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:23:28,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:23:28,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:23:28,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:23:28,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:23:05" (1/3) ... [2020-10-27 19:23:28,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebcbb4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:23:28, skipping insertion in model container [2020-10-27 19:23:28,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:23:09" (2/3) ... [2020-10-27 19:23:28,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebcbb4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:23:28, skipping insertion in model container [2020-10-27 19:23:28,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:23:28" (3/3) ... [2020-10-27 19:23:28,977 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label20.c [2020-10-27 19:23:28,991 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:23:28,998 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:23:29,013 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:23:29,075 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:23:29,075 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:23:29,076 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:23:29,076 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:23:29,076 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:23:29,077 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:23:29,077 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:23:29,077 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:23:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:23:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:23:29,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:23:29,153 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] [2020-10-27 19:23:29,154 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:23:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:23:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash 162938141, now seen corresponding path program 1 times [2020-10-27 19:23:29,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:23:29,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319590029] [2020-10-27 19:23:29,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:23:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:23:29,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:23:30,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:23:30,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 19:23:30,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:23:30,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-27 19:23:30,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:23:30,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:23:30,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:23:30,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 19:23:30,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16 [2020-10-27 19:23:30,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:23:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:23:30,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:23:30,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:23:30,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:23:30,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:23:30,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 19:23:30,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:23:30,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:23:30,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:23:30,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:23:30,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:23:30,272 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 19:23:30,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319590029] [2020-10-27 19:23:30,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:23:30,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:23:30,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066373808] [2020-10-27 19:23:30,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:23:30,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:23:30,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:23:30,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:23:30,301 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 19:24:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:24:02,791 INFO L93 Difference]: Finished difference Result 5036 states and 9459 transitions. [2020-10-27 19:24:02,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:24:02,795 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-27 19:24:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:24:02,841 INFO L225 Difference]: With dead ends: 5036 [2020-10-27 19:24:02,842 INFO L226 Difference]: Without dead ends: 3191 [2020-10-27 19:24:02,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 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 19:24:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2020-10-27 19:24:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3185. [2020-10-27 19:24:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3185 states. [2020-10-27 19:24:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 4966 transitions. [2020-10-27 19:24:03,092 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 4966 transitions. Word has length 50 [2020-10-27 19:24:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:24:03,094 INFO L481 AbstractCegarLoop]: Abstraction has 3185 states and 4966 transitions. [2020-10-27 19:24:03,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:24:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 4966 transitions. [2020-10-27 19:24:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 19:24:03,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:24:03,111 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:24:03,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:24:03,112 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:24:03,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:24:03,113 INFO L82 PathProgramCache]: Analyzing trace with hash 55848255, now seen corresponding path program 1 times [2020-10-27 19:24:03,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:24:03,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038944457] [2020-10-27 19:24:03,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:24:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:24:03,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:24:03,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:24:03,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:24:04,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:24:05,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:24:05,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 19:24:05,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:24:05,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2370 [2020-10-27 19:24:05,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:24:05,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:24:05,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 19:24:05,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 19:24:05,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:24:05,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:24:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:24:05,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:24:05,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:24:05,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:24:05,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:24:05,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:24:05,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:24:05,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:24:05,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:24:05,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:24:05,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:24:05,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:24:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:24:05,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:24:05,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:24:06,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:24:06,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 19:24:06,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:24:06,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 19:24:06,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:24:06,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:24:06,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-27 19:24:06,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:24:06,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:24:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:24:06,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038944457] [2020-10-27 19:24:06,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:24:06,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:24:06,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897564771] [2020-10-27 19:24:06,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:24:06,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:24:06,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:24:06,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:24:06,281 INFO L87 Difference]: Start difference. First operand 3185 states and 4966 transitions. Second operand 6 states. [2020-10-27 19:25:32,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:25:32,156 INFO L93 Difference]: Finished difference Result 12056 states and 20093 transitions. [2020-10-27 19:25:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:25:32,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2020-10-27 19:25:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:25:32,221 INFO L225 Difference]: With dead ends: 12056 [2020-10-27 19:25:32,222 INFO L226 Difference]: Without dead ends: 8877 [2020-10-27 19:25:32,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:25:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8877 states. [2020-10-27 19:25:32,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8877 to 8862. [2020-10-27 19:25:32,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8862 states. [2020-10-27 19:25:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8862 states to 8862 states and 11619 transitions. [2020-10-27 19:25:32,525 INFO L78 Accepts]: Start accepts. Automaton has 8862 states and 11619 transitions. Word has length 123 [2020-10-27 19:25:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:25:32,526 INFO L481 AbstractCegarLoop]: Abstraction has 8862 states and 11619 transitions. [2020-10-27 19:25:32,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:25:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 8862 states and 11619 transitions. [2020-10-27 19:25:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 19:25:32,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:25:32,528 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:25:32,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:25:32,529 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:25:32,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:25:32,530 INFO L82 PathProgramCache]: Analyzing trace with hash 40329537, now seen corresponding path program 1 times [2020-10-27 19:25:32,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:25:32,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179174857] [2020-10-27 19:25:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:25:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:25:32,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:32,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:32,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:34,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:25:34,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 19:25:34,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:25:34,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1449 [2020-10-27 19:25:34,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:25:34,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:25:34,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 19:25:34,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 19:25:34,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:25:34,204 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:25:34,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:25:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:25:34,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:34,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:25:34,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:25:34,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:25:34,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:25:34,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:25:34,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:25:34,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:25:34,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:25:34,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:25:34,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:25:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:25:34,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:34,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:25:34,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 19:25:34,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:25:34,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-27 19:25:34,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:25:34,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:25:34,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:25:34,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 19:25:34,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:25:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:25:34,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179174857] [2020-10-27 19:25:34,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:25:34,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:25:34,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519190266] [2020-10-27 19:25:34,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:25:34,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:25:34,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:25:34,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:25:34,520 INFO L87 Difference]: Start difference. First operand 8862 states and 11619 transitions. Second operand 5 states. [2020-10-27 19:25:35,130 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:26:30,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:26:30,925 INFO L93 Difference]: Finished difference Result 20542 states and 27988 transitions. [2020-10-27 19:26:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:26:30,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2020-10-27 19:26:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:26:31,023 INFO L225 Difference]: With dead ends: 20542 [2020-10-27 19:26:31,026 INFO L226 Difference]: Without dead ends: 11686 [2020-10-27 19:26:31,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:26:31,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11686 states. [2020-10-27 19:26:31,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11686 to 11677. [2020-10-27 19:26:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11677 states. [2020-10-27 19:26:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11677 states to 11677 states and 14915 transitions. [2020-10-27 19:26:31,457 INFO L78 Accepts]: Start accepts. Automaton has 11677 states and 14915 transitions. Word has length 123 [2020-10-27 19:26:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:26:31,461 INFO L481 AbstractCegarLoop]: Abstraction has 11677 states and 14915 transitions. [2020-10-27 19:26:31,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:26:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 11677 states and 14915 transitions. [2020-10-27 19:26:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-27 19:26:31,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:26:31,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:26:31,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:26:31,474 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:26:31,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:26:31,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1678821208, now seen corresponding path program 1 times [2020-10-27 19:26:31,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:26:31,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740146896] [2020-10-27 19:26:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:26:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:31,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:31,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:32,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:32,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 19:26:32,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:26:32,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-27 19:26:32,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:26:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 19:26:32,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 19:26:32,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:26:32,684 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:26:32,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:26:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:32,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:32,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:32,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:26:32,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:26:32,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:26:32,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:32,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:26:32,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:26:32,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:26:32,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:26:32,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:26:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:32,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:32,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:32,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 19:26:32,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:26:32,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-27 19:26:32,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:32,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:26:32,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:26:32,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 19:26:32,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:26:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:26:32,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740146896] [2020-10-27 19:26:32,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:26:32,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:26:32,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685998090] [2020-10-27 19:26:32,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:26:32,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:26:32,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:26:32,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:26:32,911 INFO L87 Difference]: Start difference. First operand 11677 states and 14915 transitions. Second operand 5 states. [2020-10-27 19:26:33,919 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66