/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/Problem06_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:39:35,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:39:35,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:39:35,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:39:35,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:39:35,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:39:35,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:39:35,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:39:35,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:39:36,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:39:36,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:39:36,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:39:36,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:39:36,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:39:36,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:39:36,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:39:36,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:39:36,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:39:36,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:39:36,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:39:36,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:39:36,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:39:36,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:39:36,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:39:36,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:39:36,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:39:36,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:39:36,065 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:39:36,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:39:36,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:39:36,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:39:36,069 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:39:36,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:39:36,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:39:36,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:39:36,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:39:36,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:39:36,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:39:36,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:39:36,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:39:36,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:39:36,084 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 21:39:36,122 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:39:36,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:39:36,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:39:36,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:39:36,124 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:39:36,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:39:36,124 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:39:36,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:39:36,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:39:36,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:39:36,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:39:36,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:39:36,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:39:36,126 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:39:36,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:39:36,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:39:36,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:39:36,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:39:36,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:39:36,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:39:36,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:39:36,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:39:36,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:39:36,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:39:36,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:39:36,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:39:36,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:39:36,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:39:36,129 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:39:36,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:39:36,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:39:36,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:39:36,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:39:36,554 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:39:36,554 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:39:36,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label50.c [2020-10-26 21:39:36,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/235d47be8/cca8c21aac3d434dbb265ae17f9cdd66/FLAG4c7559e7f [2020-10-26 21:39:37,902 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:39:37,903 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label50.c [2020-10-26 21:39:37,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/235d47be8/cca8c21aac3d434dbb265ae17f9cdd66/FLAG4c7559e7f [2020-10-26 21:39:38,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/235d47be8/cca8c21aac3d434dbb265ae17f9cdd66 [2020-10-26 21:39:38,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:39:38,183 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:39:38,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:39:38,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:39:38,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:39:38,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:39:38" (1/1) ... [2020-10-26 21:39:38,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f76bfbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:38, skipping insertion in model container [2020-10-26 21:39:38,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:39:38" (1/1) ... [2020-10-26 21:39:38,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:39:38,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:39:40,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:39:40,623 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:39:41,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:39:41,755 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:39:41,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:41 WrapperNode [2020-10-26 21:39:41,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:39:41,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:39:41,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:39:41,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:39:41,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:41" (1/1) ... [2020-10-26 21:39:41,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:41" (1/1) ... [2020-10-26 21:39:41,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:41" (1/1) ... [2020-10-26 21:39:41,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:41" (1/1) ... [2020-10-26 21:39:42,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:41" (1/1) ... [2020-10-26 21:39:42,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:41" (1/1) ... [2020-10-26 21:39:42,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:41" (1/1) ... [2020-10-26 21:39:42,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:39:42,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:39:42,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:39:42,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:39:42,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:39:42,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:39:42,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:39:42,406 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:39:42,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:39:42,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:39:42,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:39:42,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:39:42,407 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:39:42,407 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:39:42,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:39:42,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:39:42,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:39:42,407 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:39:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:39:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:39:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:39:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:39:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:39:42,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:39:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:39:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:39:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:39:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:39:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:39:42,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:39:42,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:39:42,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:39:50,918 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:39:50,920 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:39:50,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:39:50 BoogieIcfgContainer [2020-10-26 21:39:50,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:39:50,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:39:50,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:39:50,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:39:50,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:39:38" (1/3) ... [2020-10-26 21:39:50,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781bf2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:39:50, skipping insertion in model container [2020-10-26 21:39:50,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:39:41" (2/3) ... [2020-10-26 21:39:50,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781bf2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:39:50, skipping insertion in model container [2020-10-26 21:39:50,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:39:50" (3/3) ... [2020-10-26 21:39:50,938 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label50.c [2020-10-26 21:39:50,951 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:39:50,958 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:39:50,973 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:39:51,013 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:39:51,013 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:39:51,013 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:39:51,013 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:39:51,014 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:39:51,014 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:39:51,014 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:39:51,014 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:39:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:39:51,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 992 [2020-10-26 21:39:51,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:39:51,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:39:51,141 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:39:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:39:51,148 INFO L82 PathProgramCache]: Analyzing trace with hash 824050276, now seen corresponding path program 1 times [2020-10-26 21:39:51,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:39:51,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212470952] [2020-10-26 21:39:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:39:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:39:53,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:56,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:39:57,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:39:57,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1009 [2020-10-26 21:39:57,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:39:57,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5233 [2020-10-26 21:39:57,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:39:57,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:39:57,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:39:57,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-26 21:39:57,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 21:40:00,936 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-10-26 21:40:01,357 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:40:01,829 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:40:02,117 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-26 21:40:02,378 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-26 21:40:02,619 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:40:02,849 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:40:03,098 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-26 21:40:03,291 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 21:40:03,491 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 21:40:03,714 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 21:40:04,417 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:40:04,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:40:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:40:04,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:40:04,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:40:04,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:40:04,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:40:04,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 21:40:04,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:40:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:40:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:40:04,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:40:04,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:40:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:40:17,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212470952] [2020-10-26 21:40:17,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:40:17,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:40:17,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157712643] [2020-10-26 21:40:17,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:40:17,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:40:17,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:40:17,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:40:17,326 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-26 21:40:17,911 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 21:40:18,929 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 21:40:19,963 WARN L193 SmtUtils]: Spent 941.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 21:40:21,088 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 214 DAG size of output: 204 [2020-10-26 21:40:25,793 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 212 DAG size of output: 203 [2020-10-26 21:40:30,105 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 215 DAG size of output: 202 [2020-10-26 21:40:33,205 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 193 [2020-10-26 21:40:34,261 WARN L193 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 199 [2020-10-26 21:40:35,594 WARN L193 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 198 [2020-10-26 21:40:46,350 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 191 [2020-10-26 21:40:47,411 WARN L193 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 196 [2020-10-26 21:40:50,753 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 195 [2020-10-26 21:40:58,848 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 189 [2020-10-26 21:40:59,880 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 193 [2020-10-26 21:41:02,780 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 191 [2020-10-26 21:41:15,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:41:15,954 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-26 21:41:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:41:15,958 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 991 [2020-10-26 21:41:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:41:16,013 INFO L225 Difference]: With dead ends: 3401 [2020-10-26 21:41:16,013 INFO L226 Difference]: Without dead ends: 2020 [2020-10-26 21:41:16,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:41:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-26 21:41:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-26 21:41:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-26 21:41:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-26 21:41:16,242 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 991 [2020-10-26 21:41:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:41:16,245 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-26 21:41:16,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:41:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-26 21:41:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2020-10-26 21:41:16,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:41:16,295 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:41:16,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:41:16,302 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:41:16,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:41:16,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1818839685, now seen corresponding path program 1 times [2020-10-26 21:41:16,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:41:16,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762138960] [2020-10-26 21:41:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:41:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:16,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:19,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:21,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:21,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1081 [2020-10-26 21:41:21,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:41:21,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-26 21:41:21,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:21,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:41:21,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:41:21,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:41:21,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:23,150 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:41:23,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:41:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:23,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:23,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:23,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:41:23,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:41:23,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 21:41:23,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:23,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:41:23,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:41:23,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:41:23,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:23,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:41:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:23,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:23,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:23,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:41:23,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:41:23,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-26 21:41:23,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:23,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:41:23,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:41:23,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:41:23,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:41:25,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762138960] [2020-10-26 21:41:25,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:41:25,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:41:25,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995406957] [2020-10-26 21:41:25,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:41:25,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:41:25,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:41:25,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:41:25,135 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states. [2020-10-26 21:41:25,435 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 21:41:26,831 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 21:41:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:41:50,565 INFO L93 Difference]: Finished difference Result 4473 states and 7507 transitions. [2020-10-26 21:41:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:41:50,567 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1061 [2020-10-26 21:41:50,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:41:50,586 INFO L225 Difference]: With dead ends: 4473 [2020-10-26 21:41:50,586 INFO L226 Difference]: Without dead ends: 3213 [2020-10-26 21:41:50,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:41:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2020-10-26 21:41:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 3141. [2020-10-26 21:41:50,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3141 states. [2020-10-26 21:41:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 4647 transitions. [2020-10-26 21:41:50,696 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 4647 transitions. Word has length 1061 [2020-10-26 21:41:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:41:50,697 INFO L481 AbstractCegarLoop]: Abstraction has 3141 states and 4647 transitions. [2020-10-26 21:41:50,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:41:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 4647 transitions. [2020-10-26 21:41:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1114 [2020-10-26 21:41:50,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:41:50,716 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:41:50,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:41:50,716 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:41:50,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:41:50,717 INFO L82 PathProgramCache]: Analyzing trace with hash -665950952, now seen corresponding path program 1 times [2020-10-26 21:41:50,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:41:50,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855832044] [2020-10-26 21:41:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:41:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:41:51,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:52,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:41:56,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:41:56,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1133 [2020-10-26 21:41:56,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:41:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5188 [2020-10-26 21:41:56,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:41:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 21:41:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:41:56,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 552 [2020-10-26 21:41:56,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:41:59,278 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-26 21:41:59,496 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-26 21:41:59,684 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-26 21:41:59,867 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-26 21:42:00,040 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-26 21:42:00,207 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-10-26 21:42:00,494 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-26 21:42:00,785 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-26 21:42:01,166 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 68 [2020-10-26 21:42:01,590 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 65 [2020-10-26 21:42:02,053 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 65 [2020-10-26 21:42:02,318 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:42:02,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:42:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:02,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:02,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:02,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:42:02,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:02,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 21:42:02,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:42:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:42:02,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:42:02,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:02,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:42:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:42:02,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:42:02,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:42:02,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:42:02,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:42:02,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-10-26 21:42:02,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:42:02,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 21:42:02,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:42:02,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:42:02,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:42:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:42:13,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855832044] [2020-10-26 21:42:13,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:42:13,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 21:42:13,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331612766] [2020-10-26 21:42:13,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:42:13,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:42:13,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:42:13,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:42:13,304 INFO L87 Difference]: Start difference. First operand 3141 states and 4647 transitions. Second operand 18 states. [2020-10-26 21:42:13,762 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-26 21:42:16,119 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-10-26 21:42:16,408 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-26 21:42:16,773 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-26 21:42:17,747 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 196 [2020-10-26 21:42:18,780 WARN L193 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 204 [2020-10-26 21:42:20,325 WARN L193 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 203 [2020-10-26 21:42:24,623 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 228 DAG size of output: 206 [2020-10-26 21:42:30,174 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-26 21:42:36,637 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 220 DAG size of output: 197 [2020-10-26 21:42:37,927 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 228 DAG size of output: 203 [2020-10-26 21:42:40,047 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 226 DAG size of output: 202 [2020-10-26 21:42:52,747 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 229 DAG size of output: 201 [2020-10-26 21:42:54,668 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 233 DAG size of output: 199