/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_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:39:12,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:39:12,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:39:12,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:39:12,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:39:12,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:39:12,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:39:12,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:39:12,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:39:12,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:39:12,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:39:12,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:39:12,216 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:39:12,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:39:12,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:39:12,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:39:12,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:39:12,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:39:12,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:39:12,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:39:12,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:39:12,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:39:12,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:39:12,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:39:12,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:39:12,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:39:12,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:39:12,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:39:12,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:39:12,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:39:12,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:39:12,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:39:12,271 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:39:12,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:39:12,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:39:12,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:39:12,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:39:12,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:39:12,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:39:12,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:39:12,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:39:12,280 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 00:39:12,341 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:39:12,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:39:12,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:39:12,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:39:12,347 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:39:12,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:39:12,348 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:39:12,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:39:12,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:39:12,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:39:12,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:39:12,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:39:12,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:39:12,350 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:39:12,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:39:12,351 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:39:12,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:39:12,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:39:12,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:39:12,352 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:39:12,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:39:12,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:39:12,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:39:12,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:39:12,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:39:12,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:39:12,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:39:12,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:39:12,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:39:12,354 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:39:12,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:39:12,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:39:12,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:39:12,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:39:12,825 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:39:12,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label06.c [2020-10-27 00:39:12,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bccd6c947/dc5bbfb45bfd43b4bdc3dcdb9d732562/FLAG6a8dfa91c [2020-10-27 00:39:14,217 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:39:14,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label06.c [2020-10-27 00:39:14,278 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bccd6c947/dc5bbfb45bfd43b4bdc3dcdb9d732562/FLAG6a8dfa91c [2020-10-27 00:39:14,358 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bccd6c947/dc5bbfb45bfd43b4bdc3dcdb9d732562 [2020-10-27 00:39:14,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:39:14,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:39:14,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:39:14,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:39:14,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:39:14,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:39:14" (1/1) ... [2020-10-27 00:39:14,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1502a49e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:14, skipping insertion in model container [2020-10-27 00:39:14,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:39:14" (1/1) ... [2020-10-27 00:39:14,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:39:14,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:39:16,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:39:16,721 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:39:17,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:39:17,948 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:39:17,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:17 WrapperNode [2020-10-27 00:39:17,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:39:17,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:39:17,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:39:17,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:39:17,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:17" (1/1) ... [2020-10-27 00:39:17,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:17" (1/1) ... [2020-10-27 00:39:18,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:17" (1/1) ... [2020-10-27 00:39:18,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:17" (1/1) ... [2020-10-27 00:39:18,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:17" (1/1) ... [2020-10-27 00:39:18,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:17" (1/1) ... [2020-10-27 00:39:18,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:17" (1/1) ... [2020-10-27 00:39:18,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:39:18,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:39:18,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:39:18,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:39:18,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:17" (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 00:39:18,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:39:18,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:39:18,783 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:39:18,784 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:39:18,784 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:39:18,784 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:39:18,784 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:39:18,785 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:39:18,785 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:39:18,785 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:39:18,786 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:39:18,786 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:39:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:39:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:39:18,787 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:39:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:39:18,788 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:39:18,789 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:39:18,789 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:39:18,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:39:18,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:39:18,789 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:39:18,790 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:39:18,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:39:18,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:39:18,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:39:18,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:39:18,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:39:18,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:39:35,681 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:39:35,681 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:39:35,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:39:35 BoogieIcfgContainer [2020-10-27 00:39:35,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:39:35,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:39:35,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:39:35,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:39:35,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:39:14" (1/3) ... [2020-10-27 00:39:35,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d28f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:39:35, skipping insertion in model container [2020-10-27 00:39:35,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:17" (2/3) ... [2020-10-27 00:39:35,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d28f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:39:35, skipping insertion in model container [2020-10-27 00:39:35,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:39:35" (3/3) ... [2020-10-27 00:39:35,700 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label06.c [2020-10-27 00:39:35,714 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:39:35,723 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:39:35,739 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:39:35,783 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:39:35,783 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:39:35,784 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:39:35,784 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:39:35,784 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:39:35,784 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:39:35,784 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:39:35,784 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:39:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:39:35,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 00:39:35,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:39:35,851 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] [2020-10-27 00:39:35,852 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:39:35,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:39:35,860 INFO L82 PathProgramCache]: Analyzing trace with hash 998093102, now seen corresponding path program 1 times [2020-10-27 00:39:35,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:39:35,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97130041] [2020-10-27 00:39:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:39:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:36,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:37,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:37,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 00:39:37,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:39:37,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-27 00:39:37,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:37,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:39:37,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:39:37,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 00:39:37,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:39:37,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:39:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:37,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:37,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:37,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:39:37,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:39:37,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 00:39:37,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:37,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:39:37,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:39:37,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:39:37,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:39:37,294 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 00:39:37,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97130041] [2020-10-27 00:39:37,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:39:37,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:39:37,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793661421] [2020-10-27 00:39:37,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:39:37,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:39:37,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:39:37,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:39:37,326 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:40:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:40:11,842 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-27 00:40:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:40:11,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-27 00:40:11,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:40:11,905 INFO L225 Difference]: With dead ends: 5116 [2020-10-27 00:40:11,906 INFO L226 Difference]: Without dead ends: 3271 [2020-10-27 00:40:11,927 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 00:40:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-27 00:40:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-27 00:40:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-27 00:40:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-27 00:40:12,222 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 61 [2020-10-27 00:40:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:40:12,224 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-27 00:40:12,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:40:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-27 00:40:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 00:40:12,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:40:12,242 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, 1, 1, 1, 1, 1, 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 00:40:12,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:40:12,244 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:40:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:40:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1826940297, now seen corresponding path program 1 times [2020-10-27 00:40:12,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:40:12,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855499248] [2020-10-27 00:40:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:40:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:12,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:12,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:14,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:14,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 00:40:14,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:40:14,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1878 [2020-10-27 00:40:14,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:14,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:40:14,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:40:14,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:40:14,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:40:14,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:40:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:14,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:14,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:14,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:40:14,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:14,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 00:40:14,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:14,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:40:14,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:40:14,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:40:14,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-27 00:40:14,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:40:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:14,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:14,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:14,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 00:40:14,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:14,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-10-27 00:40:14,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:14,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:40:14,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:40:14,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:40:14,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:40:14,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855499248] [2020-10-27 00:40:14,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:40:14,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:40:14,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083531697] [2020-10-27 00:40:14,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:40:14,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:40:14,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:40:14,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:40:14,866 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 7 states. [2020-10-27 00:40:15,026 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:41:11,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:41:11,545 INFO L93 Difference]: Finished difference Result 9460 states and 16465 transitions. [2020-10-27 00:41:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:41:11,551 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2020-10-27 00:41:11,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:41:11,614 INFO L225 Difference]: With dead ends: 9460 [2020-10-27 00:41:11,615 INFO L226 Difference]: Without dead ends: 6266 [2020-10-27 00:41:11,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:41:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6266 states. [2020-10-27 00:41:11,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6266 to 6122. [2020-10-27 00:41:11,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6122 states. [2020-10-27 00:41:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6122 states to 6122 states and 8999 transitions. [2020-10-27 00:41:11,949 INFO L78 Accepts]: Start accepts. Automaton has 6122 states and 8999 transitions. Word has length 133 [2020-10-27 00:41:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:41:11,953 INFO L481 AbstractCegarLoop]: Abstraction has 6122 states and 8999 transitions. [2020-10-27 00:41:11,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:41:11,954 INFO L276 IsEmpty]: Start isEmpty. Operand 6122 states and 8999 transitions. [2020-10-27 00:41:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-27 00:41:11,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:41:11,967 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:11,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:41:11,970 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:41:11,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:41:11,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1584611298, now seen corresponding path program 1 times [2020-10-27 00:41:11,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:41:11,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348360556] [2020-10-27 00:41:11,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:41:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:12,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:12,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:13,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:13,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 00:41:13,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:41:13,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1409 [2020-10-27 00:41:13,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:13,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:41:13,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:41:13,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:41:13,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:41:13,648 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:41:13,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:41:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:13,664 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: 8 [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: 28 [2020-10-27 00:41:13,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:13,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:41:13,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:41:13,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:41:13,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:13,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:41:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:13,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:13,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:13,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 00:41:13,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:13,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 00:41:13,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:13,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:41:13,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:41:13,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:41:13,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:41:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:41:14,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348360556] [2020-10-27 00:41:14,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:41:14,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:41:14,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101664845] [2020-10-27 00:41:14,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:41:14,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:41:14,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:41:14,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:41:14,145 INFO L87 Difference]: Start difference. First operand 6122 states and 8999 transitions. Second operand 7 states. [2020-10-27 00:41:14,316 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:42:16,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:42:16,985 INFO L93 Difference]: Finished difference Result 18438 states and 27598 transitions. [2020-10-27 00:42:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:42:16,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 142 [2020-10-27 00:42:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:42:17,061 INFO L225 Difference]: With dead ends: 18438 [2020-10-27 00:42:17,062 INFO L226 Difference]: Without dead ends: 12322 [2020-10-27 00:42:17,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:42:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12322 states. [2020-10-27 00:42:17,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12322 to 12086. [2020-10-27 00:42:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12086 states. [2020-10-27 00:42:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12086 states to 12086 states and 17306 transitions. [2020-10-27 00:42:17,443 INFO L78 Accepts]: Start accepts. Automaton has 12086 states and 17306 transitions. Word has length 142 [2020-10-27 00:42:17,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:42:17,450 INFO L481 AbstractCegarLoop]: Abstraction has 12086 states and 17306 transitions. [2020-10-27 00:42:17,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:42:17,451 INFO L276 IsEmpty]: Start isEmpty. Operand 12086 states and 17306 transitions. [2020-10-27 00:42:17,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-27 00:42:17,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:42:17,456 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:42:17,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:42:17,456 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:42:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:42:17,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1333365384, now seen corresponding path program 1 times [2020-10-27 00:42:17,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:42:17,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366591098] [2020-10-27 00:42:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:42:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:17,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:17,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:18,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:19,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:19,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-27 00:42:19,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:42:19,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2176 [2020-10-27 00:42:19,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:42:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:42:19,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:42:19,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:19,913 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:42:19,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:42:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:19,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:19,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:19,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:42:19,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:19,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:42:19,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:19,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:42:19,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:42:19,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:42:19,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:19,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:42:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:20,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:20,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:20,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:42:20,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:20,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-27 00:42:20,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:20,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:42:20,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:42:20,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:42:20,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:42:20,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366591098] [2020-10-27 00:42:20,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:42:20,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:42:20,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802569574] [2020-10-27 00:42:20,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:42:20,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:42:20,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:42:20,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:42:20,391 INFO L87 Difference]: Start difference. First operand 12086 states and 17306 transitions. Second operand 7 states.