/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:14:36,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:14:36,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:14:36,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:14:36,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:14:36,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:14:36,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:14:36,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:14:36,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:14:36,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:14:36,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:14:36,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:14:36,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:14:36,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:14:36,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:14:36,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:14:36,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:14:36,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:14:36,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:14:36,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:14:36,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:14:36,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:14:36,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:14:36,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:14:36,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:14:36,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:14:36,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:14:36,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:14:36,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:14:36,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:14:36,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:14:36,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:14:36,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:14:36,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:14:36,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:14:36,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:14:36,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:14:36,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:14:36,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:14:36,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:14:36,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:14:36,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:14:37,023 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:14:37,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:14:37,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:14:37,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:14:37,026 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:14:37,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:14:37,026 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:14:37,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:14:37,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:14:37,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:14:37,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:14:37,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:14:37,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:14:37,028 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:14:37,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:14:37,028 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:14:37,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:14:37,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:14:37,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:14:37,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:14:37,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:14:37,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:14:37,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:14:37,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:14:37,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:14:37,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:14:37,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:14:37,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:14:37,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:14:37,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:14:37,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:14:37,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:14:37,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:14:37,510 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:14:37,511 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:14:37,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2020-10-28 14:14:37,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d610ee314/1cbde02333d64b08a410c58756b1f995/FLAG27e78b2be [2020-10-28 14:14:38,964 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:14:38,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2020-10-28 14:14:39,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d610ee314/1cbde02333d64b08a410c58756b1f995/FLAG27e78b2be [2020-10-28 14:14:39,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d610ee314/1cbde02333d64b08a410c58756b1f995 [2020-10-28 14:14:39,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:14:39,268 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:14:39,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:14:39,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:14:39,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:14:39,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:14:39" (1/1) ... [2020-10-28 14:14:39,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2305d4dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:39, skipping insertion in model container [2020-10-28 14:14:39,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:14:39" (1/1) ... [2020-10-28 14:14:39,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:14:39,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:14:42,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:14:42,017 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:14:43,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:14:43,224 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:14:43,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43 WrapperNode [2020-10-28 14:14:43,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:14:43,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:14:43,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:14:43,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:14:43,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:43,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:43,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:43,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:43,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:43,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:43,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:43,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:14:43,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:14:43,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:14:43,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:14:43,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:14:44,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:14:44,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:14:44,010 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:14:44,010 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:14:44,011 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:14:44,011 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:14:44,011 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:14:44,011 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:14:44,011 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:14:44,011 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:14:44,013 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:14:44,013 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:14:44,013 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:14:44,013 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:14:44,013 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:14:44,014 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:14:44,014 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:14:44,015 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:14:44,015 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:14:44,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:14:44,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:14:44,015 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:14:44,015 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:14:44,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:14:44,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:14:44,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:14:44,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:14:44,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:14:44,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:14:58,754 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:14:58,756 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:14:58,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:14:58 BoogieIcfgContainer [2020-10-28 14:14:58,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:14:58,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:14:58,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:14:58,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:14:58,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:14:39" (1/3) ... [2020-10-28 14:14:58,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22845d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:14:58, skipping insertion in model container [2020-10-28 14:14:58,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (2/3) ... [2020-10-28 14:14:58,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22845d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:14:58, skipping insertion in model container [2020-10-28 14:14:58,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:14:58" (3/3) ... [2020-10-28 14:14:58,775 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label43.c [2020-10-28 14:14:58,788 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:14:58,795 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:14:58,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:14:58,850 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:14:58,850 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:14:58,851 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:14:58,851 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:14:58,851 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:14:58,851 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:14:58,851 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:14:58,851 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:14:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:14:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 14:14:58,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:14:58,917 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] [2020-10-28 14:14:58,918 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:14:58,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:14:58,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1687638702, now seen corresponding path program 1 times [2020-10-28 14:14:58,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:14:58,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572415413] [2020-10-28 14:14:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:14:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:59,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:59,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:59,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:14:59,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:14:59,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-28 14:14:59,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:59,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:59,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:14:59,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:14:59,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:14:59,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:14:59,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:14:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:59,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:00,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:00,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:15:00,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:15:00,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 14:15:00,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:00,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:00,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:15:00,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:15:00,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:15:00,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:15:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:15:00,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572415413] [2020-10-28 14:15:00,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:15:00,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:15:00,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97355747] [2020-10-28 14:15:00,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:15:00,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:15:00,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:15:00,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:15:00,070 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-28 14:15:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:15:31,290 INFO L93 Difference]: Finished difference Result 5036 states and 9459 transitions. [2020-10-28 14:15:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:15:31,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-28 14:15:31,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:15:31,344 INFO L225 Difference]: With dead ends: 5036 [2020-10-28 14:15:31,344 INFO L226 Difference]: Without dead ends: 3191 [2020-10-28 14:15:31,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:15:31,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2020-10-28 14:15:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3185. [2020-10-28 14:15:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3185 states. [2020-10-28 14:15:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 4966 transitions. [2020-10-28 14:15:31,590 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 4966 transitions. Word has length 29 [2020-10-28 14:15:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:15:31,591 INFO L481 AbstractCegarLoop]: Abstraction has 3185 states and 4966 transitions. [2020-10-28 14:15:31,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:15:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 4966 transitions. [2020-10-28 14:15:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 14:15:31,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:15:31,597 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:15:31,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:15:31,598 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:15:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:15:31,599 INFO L82 PathProgramCache]: Analyzing trace with hash -974389909, now seen corresponding path program 1 times [2020-10-28 14:15:31,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:15:31,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890768671] [2020-10-28 14:15:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:15:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:31,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:31,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:31,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:32,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:33,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:33,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 14:15:33,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:15:33,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2115 [2020-10-28 14:15:33,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:33,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:33,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:15:33,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-28 14:15:33,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:15:33,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:15:33,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:15:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:33,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:33,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:33,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:15:33,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:15:33,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:15:33,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:33,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:33,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:15:33,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:15:33,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:15:33,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:15:33,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:15:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:33,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:34,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:34,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:15:34,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:15:34,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-28 14:15:34,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:34,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:34,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:15:34,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 14:15:34,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:15:34,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:15:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:15:34,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890768671] [2020-10-28 14:15:34,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:15:34,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:15:34,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002760465] [2020-10-28 14:15:34,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:15:34,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:15:34,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:15:34,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:15:34,205 INFO L87 Difference]: Start difference. First operand 3185 states and 4966 transitions. Second operand 5 states. [2020-10-28 14:16:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:16:15,906 INFO L93 Difference]: Finished difference Result 9220 states and 14514 transitions. [2020-10-28 14:16:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:16:15,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-28 14:16:15,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:16:15,952 INFO L225 Difference]: With dead ends: 9220 [2020-10-28 14:16:15,953 INFO L226 Difference]: Without dead ends: 6041 [2020-10-28 14:16:15,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:16:15,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6041 states. [2020-10-28 14:16:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6041 to 6025. [2020-10-28 14:16:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6025 states. [2020-10-28 14:16:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 8359 transitions. [2020-10-28 14:16:16,183 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 8359 transitions. Word has length 102 [2020-10-28 14:16:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:16:16,184 INFO L481 AbstractCegarLoop]: Abstraction has 6025 states and 8359 transitions. [2020-10-28 14:16:16,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:16:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 8359 transitions. [2020-10-28 14:16:16,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 14:16:16,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:16:16,196 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:16:16,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:16:16,197 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:16:16,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:16:16,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1483862999, now seen corresponding path program 1 times [2020-10-28 14:16:16,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:16:16,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350968664] [2020-10-28 14:16:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:16:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:16,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:16,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:16,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:17,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:17,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:17,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 14:16:17,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:16:17,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1193 [2020-10-28 14:16:17,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:17,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:17,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:16:17,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:16:17,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 14:16:17,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:16:17,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:16:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:17,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:17,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:17,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:16:17,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:17,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 14:16:17,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:17,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:17,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:16:17,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:16:17,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:16:17,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:16:17,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:16:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:17,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:17,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:17,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:16:17,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:17,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-28 14:16:17,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:17,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:17,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:16:17,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:16:17,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 14:16:17,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:16:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:16:17,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350968664] [2020-10-28 14:16:17,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:16:17,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:16:17,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929759476] [2020-10-28 14:16:17,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:16:17,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:16:17,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:16:17,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:16:17,943 INFO L87 Difference]: Start difference. First operand 6025 states and 8359 transitions. Second operand 7 states. [2020-10-28 14:17:12,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:17:12,296 INFO L93 Difference]: Finished difference Result 18068 states and 25374 transitions. [2020-10-28 14:17:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:17:12,301 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 102 [2020-10-28 14:17:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:17:12,376 INFO L225 Difference]: With dead ends: 18068 [2020-10-28 14:17:12,377 INFO L226 Difference]: Without dead ends: 12049 [2020-10-28 14:17:12,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:17:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12049 states. [2020-10-28 14:17:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12049 to 11976. [2020-10-28 14:17:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11976 states. [2020-10-28 14:17:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11976 states to 11976 states and 16244 transitions. [2020-10-28 14:17:12,814 INFO L78 Accepts]: Start accepts. Automaton has 11976 states and 16244 transitions. Word has length 102 [2020-10-28 14:17:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:17:12,817 INFO L481 AbstractCegarLoop]: Abstraction has 11976 states and 16244 transitions. [2020-10-28 14:17:12,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:17:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 11976 states and 16244 transitions. [2020-10-28 14:17:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-28 14:17:12,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:17:12,835 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:17:12,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:17:12,836 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:17:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:17:12,839 INFO L82 PathProgramCache]: Analyzing trace with hash 169476344, now seen corresponding path program 1 times [2020-10-28 14:17:12,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:17:12,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490129954] [2020-10-28 14:17:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:17:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:17:12,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:13,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:13,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:14,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:17:14,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-28 14:17:14,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:17:14,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1655 [2020-10-28 14:17:14,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:17:14,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:17:14,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:17:14,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:17:14,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 14:17:14,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:17:14,728 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:17:14,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:17:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:17:14,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:14,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:17:14,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:17:14,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:17:14,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 14:17:14,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:17:14,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:17:14,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:17:14,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:17:14,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:17:14,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:17:14,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:17:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:17:14,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:17:15,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:17:15,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:17:15,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:17:15,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-28 14:17:15,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:17:15,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:17:15,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:17:15,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:17:15,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 14:17:15,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:17:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:17:15,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490129954] [2020-10-28 14:17:15,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:17:15,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:17:15,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2410670] [2020-10-28 14:17:15,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:17:15,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:17:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:17:15,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:17:15,170 INFO L87 Difference]: Start difference. First operand 11976 states and 16244 transitions. Second operand 7 states. [2020-10-28 14:17:15,347 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:17:18,761 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:18:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:18:29,942 INFO L93 Difference]: Finished difference Result 30158 states and 41027 transitions. [2020-10-28 14:18:29,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:18:29,947 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 130 [2020-10-28 14:18:29,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:18:30,031 INFO L225 Difference]: With dead ends: 30158 [2020-10-28 14:18:30,034 INFO L226 Difference]: Without dead ends: 18188 [2020-10-28 14:18:30,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:18:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18188 states. [2020-10-28 14:18:30,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18188 to 17910. [2020-10-28 14:18:30,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17910 states. [2020-10-28 14:18:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17910 states to 17910 states and 22676 transitions. [2020-10-28 14:18:30,618 INFO L78 Accepts]: Start accepts. Automaton has 17910 states and 22676 transitions. Word has length 130 [2020-10-28 14:18:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:18:30,623 INFO L481 AbstractCegarLoop]: Abstraction has 17910 states and 22676 transitions. [2020-10-28 14:18:30,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:18:30,623 INFO L276 IsEmpty]: Start isEmpty. Operand 17910 states and 22676 transitions. [2020-10-28 14:18:30,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-28 14:18:30,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:18:30,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:18:30,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:18:30,634 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:18:30,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:18:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1409020798, now seen corresponding path program 1 times [2020-10-28 14:18:30,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:18:30,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450651479] [2020-10-28 14:18:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:18:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:30,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:30,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:33,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:33,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-28 14:18:33,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:18:33,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2648 [2020-10-28 14:18:33,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:33,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:33,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:18:33,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:18:33,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-28 14:18:33,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:18:33,649 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:18:33,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:18:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:33,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:33,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:33,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:18:33,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:18:33,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 14:18:33,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:33,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:18:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:18:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:18:33,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:18:33,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:18:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:33,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:34,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:34,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-28 14:18:34,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:18:34,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-28 14:18:34,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:34,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:34,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:18:34,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:18:34,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-28 14:18:34,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:18:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:18:35,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450651479] [2020-10-28 14:18:35,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:18:35,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:18:35,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598461097] [2020-10-28 14:18:35,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:18:35,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:18:35,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:18:35,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:18:35,378 INFO L87 Difference]: Start difference. First operand 17910 states and 22676 transitions. Second operand 7 states. [2020-10-28 14:18:35,567 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 72