/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:38:00,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:38:00,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:38:00,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:38:00,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:38:00,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:38:00,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:38:00,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:38:00,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:38:00,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:38:00,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:38:00,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:38:00,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:38:00,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:38:00,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:38:00,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:38:00,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:38:00,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:38:01,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:38:01,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:38:01,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:38:01,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:38:01,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:38:01,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:38:01,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:38:01,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:38:01,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:38:01,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:38:01,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:38:01,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:38:01,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:38:01,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:38:01,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:38:01,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:38:01,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:38:01,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:38:01,036 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:38:01,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:38:01,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:38:01,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:38:01,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:38:01,041 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 00:38:01,072 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:38:01,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:38:01,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:38:01,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:38:01,075 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:38:01,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:38:01,075 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:38:01,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:38:01,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:38:01,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:38:01,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:38:01,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:38:01,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:38:01,077 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:38:01,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:38:01,077 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:38:01,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:38:01,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:38:01,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:38:01,079 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:38:01,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:38:01,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:38:01,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:38:01,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:38:01,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:38:01,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:38:01,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:38:01,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:38:01,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:38:01,081 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:38:01,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:38:01,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:38:01,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:38:01,506 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:38:01,507 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:38:01,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label05.c [2020-10-27 00:38:01,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b056ae5b7/4708759587454bc199a671de9d4598ac/FLAG26a2b949d [2020-10-27 00:38:02,952 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:38:02,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label05.c [2020-10-27 00:38:03,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b056ae5b7/4708759587454bc199a671de9d4598ac/FLAG26a2b949d [2020-10-27 00:38:03,216 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b056ae5b7/4708759587454bc199a671de9d4598ac [2020-10-27 00:38:03,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:38:03,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:38:03,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:38:03,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:38:03,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:38:03,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:38:03" (1/1) ... [2020-10-27 00:38:03,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35cc3228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:38:03, skipping insertion in model container [2020-10-27 00:38:03,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:38:03" (1/1) ... [2020-10-27 00:38:03,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:38:03,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:38:05,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:38:05,442 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:38:06,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:38:06,594 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:38:06,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:38:06 WrapperNode [2020-10-27 00:38:06,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:38:06,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:38:06,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:38:06,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:38:06,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:38:06" (1/1) ... [2020-10-27 00:38:06,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:38:06" (1/1) ... [2020-10-27 00:38:06,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:38:06" (1/1) ... [2020-10-27 00:38:06,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:38:06" (1/1) ... [2020-10-27 00:38:07,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:38:06" (1/1) ... [2020-10-27 00:38:07,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:38:06" (1/1) ... [2020-10-27 00:38:07,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:38:06" (1/1) ... [2020-10-27 00:38:07,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:38:07,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:38:07,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:38:07,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:38:07,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:38:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:38:07,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:38:07,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:38:07,379 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:38:07,379 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:38:07,380 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:38:07,380 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:38:07,380 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:38:07,380 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:38:07,380 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:38:07,381 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:38:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:38:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:38:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:38:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:38:07,381 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:38:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:38:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:38:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:38:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:38:07,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:38:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:38:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:38:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:38:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:38:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:38:07,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:38:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:38:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:38:07,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:38:23,925 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:38:23,925 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:38:23,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:38:23 BoogieIcfgContainer [2020-10-27 00:38:23,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:38:23,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:38:23,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:38:23,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:38:23,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:38:03" (1/3) ... [2020-10-27 00:38:23,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e25c17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:38:23, skipping insertion in model container [2020-10-27 00:38:23,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:38:06" (2/3) ... [2020-10-27 00:38:23,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e25c17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:38:23, skipping insertion in model container [2020-10-27 00:38:23,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:38:23" (3/3) ... [2020-10-27 00:38:23,942 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label05.c [2020-10-27 00:38:23,957 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:38:23,966 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:38:23,983 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:38:24,024 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:38:24,024 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:38:24,024 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:38:24,024 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:38:24,025 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:38:24,025 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:38:24,025 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:38:24,025 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:38:24,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:38:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 00:38:24,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:38:24,086 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] [2020-10-27 00:38:24,086 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:38:24,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:38:24,094 INFO L82 PathProgramCache]: Analyzing trace with hash 61052646, now seen corresponding path program 1 times [2020-10-27 00:38:24,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:38:24,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098405930] [2020-10-27 00:38:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:38:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:24,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:24,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:24,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 00:38:24,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:38:24,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-27 00:38:24,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:24,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:38:24,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:38:24,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 00:38:24,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:38:25,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:38:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:25,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:25,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:25,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:38:25,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:38:25,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 00:38:25,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:25,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:38:25,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:38:25,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:38:25,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:38:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:38:25,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098405930] [2020-10-27 00:38:25,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:38:25,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:38:25,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534514640] [2020-10-27 00:38:25,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:38:25,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:38:25,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:38:25,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:38:25,300 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:38:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:38:55,394 INFO L93 Difference]: Finished difference Result 5062 states and 9524 transitions. [2020-10-27 00:38:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:38:55,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 00:38:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:38:55,438 INFO L225 Difference]: With dead ends: 5062 [2020-10-27 00:38:55,438 INFO L226 Difference]: Without dead ends: 3201 [2020-10-27 00:38:55,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:38:55,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2020-10-27 00:38:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 3153. [2020-10-27 00:38:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3153 states. [2020-10-27 00:38:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 5020 transitions. [2020-10-27 00:38:55,671 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 5020 transitions. Word has length 67 [2020-10-27 00:38:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:38:55,674 INFO L481 AbstractCegarLoop]: Abstraction has 3153 states and 5020 transitions. [2020-10-27 00:38:55,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:38:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 5020 transitions. [2020-10-27 00:38:55,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 00:38:55,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:38:55,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:38:55,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:38:55,692 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:38:55,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:38:55,694 INFO L82 PathProgramCache]: Analyzing trace with hash -450279912, now seen corresponding path program 1 times [2020-10-27 00:38:55,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:38:55,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316234163] [2020-10-27 00:38:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:38:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:55,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:55,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:56,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:56,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:57,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:57,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-27 00:38:57,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:38:57,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2049 [2020-10-27 00:38:57,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:57,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:38:57,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:38:57,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:38:57,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:38:57,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:38:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:57,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:58,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:58,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:38:58,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:38:58,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 00:38:58,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:58,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:38:58,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:38:58,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:38:58,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:38:58,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:38:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:58,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:58,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:58,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:58,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:38:58,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:38:58,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-27 00:38:58,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:58,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:38:58,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:38:58,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:38:58,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:38:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:38:58,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316234163] [2020-10-27 00:38:58,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:38:58,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 00:38:58,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312478906] [2020-10-27 00:38:58,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:38:58,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:38:58,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:38:58,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:38:58,422 INFO L87 Difference]: Start difference. First operand 3153 states and 5020 transitions. Second operand 8 states. [2020-10-27 00:39:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:39:52,354 INFO L93 Difference]: Finished difference Result 12231 states and 19658 transitions. [2020-10-27 00:39:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:39:52,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 138 [2020-10-27 00:39:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:39:52,413 INFO L225 Difference]: With dead ends: 12231 [2020-10-27 00:39:52,413 INFO L226 Difference]: Without dead ends: 9084 [2020-10-27 00:39:52,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:39:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9084 states. [2020-10-27 00:39:52,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9084 to 8953. [2020-10-27 00:39:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8953 states. [2020-10-27 00:39:52,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8953 states to 8953 states and 13663 transitions. [2020-10-27 00:39:52,690 INFO L78 Accepts]: Start accepts. Automaton has 8953 states and 13663 transitions. Word has length 138 [2020-10-27 00:39:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:39:52,693 INFO L481 AbstractCegarLoop]: Abstraction has 8953 states and 13663 transitions. [2020-10-27 00:39:52,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:39:52,693 INFO L276 IsEmpty]: Start isEmpty. Operand 8953 states and 13663 transitions. [2020-10-27 00:39:52,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 00:39:52,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:39:52,698 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:39:52,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:39:52,699 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:39:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:39:52,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1182247338, now seen corresponding path program 1 times [2020-10-27 00:39:52,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:39:52,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203808113] [2020-10-27 00:39:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:39:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:52,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:52,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:53,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:54,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:54,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-27 00:39:54,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:39:54,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1324 [2020-10-27 00:39:54,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:54,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:39:54,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:39:54,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-27 00:39:54,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:39:54,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:39:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:54,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:54,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:54,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:39:54,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:39:54,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 00:39:54,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:39:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:39:54,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:39:54,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:39:54,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:39:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:54,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:54,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:54,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:54,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:39:54,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:39:54,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-27 00:39:54,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:54,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:39:54,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:39:54,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:39:54,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:39:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:39:54,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203808113] [2020-10-27 00:39:54,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:39:54,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:39:54,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136507859] [2020-10-27 00:39:54,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:39:54,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:39:54,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:39:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:39:54,748 INFO L87 Difference]: Start difference. First operand 8953 states and 13663 transitions. Second operand 8 states. [2020-10-27 00:40:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:40:46,385 INFO L93 Difference]: Finished difference Result 19773 states and 30281 transitions. [2020-10-27 00:40:46,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:40:46,389 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 138 [2020-10-27 00:40:46,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:40:46,464 INFO L225 Difference]: With dead ends: 19773 [2020-10-27 00:40:46,465 INFO L226 Difference]: Without dead ends: 10826 [2020-10-27 00:40:46,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:40:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10826 states. [2020-10-27 00:40:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10826 to 10509. [2020-10-27 00:40:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10509 states. [2020-10-27 00:40:46,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10509 states to 10509 states and 15352 transitions. [2020-10-27 00:40:46,821 INFO L78 Accepts]: Start accepts. Automaton has 10509 states and 15352 transitions. Word has length 138 [2020-10-27 00:40:46,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:40:46,824 INFO L481 AbstractCegarLoop]: Abstraction has 10509 states and 15352 transitions. [2020-10-27 00:40:46,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:40:46,824 INFO L276 IsEmpty]: Start isEmpty. Operand 10509 states and 15352 transitions. [2020-10-27 00:40:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-27 00:40:46,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:40:46,829 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:40:46,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:40:46,829 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:40:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:40:46,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2076051114, now seen corresponding path program 1 times [2020-10-27 00:40:46,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:40:46,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16766068] [2020-10-27 00:40:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:40:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:47,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:47,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:47,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:50,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:50,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 290 [2020-10-27 00:40:50,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:40:50,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3351 [2020-10-27 00:40:50,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:50,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:40:50,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:40:50,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-27 00:40:50,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:50,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:40:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:50,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:50,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:50,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:40:50,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:50,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:40:50,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:50,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:40:50,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:40:50,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:40:50,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:50,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:40:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:50,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:50,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:50,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-27 00:40:50,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:50,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-27 00:40:50,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:50,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:40:50,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:40:50,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-27 00:40:50,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:40:51,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16766068] [2020-10-27 00:40:51,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:40:51,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:40:51,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052555219] [2020-10-27 00:40:51,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:40:51,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:40:51,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:40:51,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:40:51,563 INFO L87 Difference]: Start difference. First operand 10509 states and 15352 transitions. Second operand 7 states. [2020-10-27 00:40:51,715 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:40:53,999 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 00:41:40,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:41:40,802 INFO L93 Difference]: Finished difference Result 22782 states and 34050 transitions. [2020-10-27 00:41:40,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:41:40,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 278 [2020-10-27 00:41:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:41:40,855 INFO L225 Difference]: With dead ends: 22782 [2020-10-27 00:41:40,855 INFO L226 Difference]: Without dead ends: 13668 [2020-10-27 00:41:40,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:41:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13668 states. [2020-10-27 00:41:41,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13668 to 13495. [2020-10-27 00:41:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13495 states. [2020-10-27 00:41:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 18726 transitions. [2020-10-27 00:41:41,291 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 18726 transitions. Word has length 278 [2020-10-27 00:41:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:41:41,293 INFO L481 AbstractCegarLoop]: Abstraction has 13495 states and 18726 transitions. [2020-10-27 00:41:41,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:41:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 18726 transitions. [2020-10-27 00:41:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-27 00:41:41,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:41:41,303 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 00:41:41,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:41:41,304 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:41:41,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:41:41,305 INFO L82 PathProgramCache]: Analyzing trace with hash -514562802, now seen corresponding path program 1 times [2020-10-27 00:41:41,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:41:41,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588073230] [2020-10-27 00:41:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:41:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:41,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:41,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:41,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:43,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:43,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:44,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:46,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:46,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 391 [2020-10-27 00:41:46,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 00:41:46,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 00:41:46,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:46,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:41:46,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:41:46,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 316 [2020-10-27 00:41:46,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:46,701 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:41:46,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:41:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:46,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:46,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:46,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:41:46,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:46,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 00:41:46,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:46,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:41:46,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:41:46,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:41:46,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:46,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:41:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:46,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:47,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:47,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-27 00:41:47,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:47,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 00:41:47,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:47,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:41:47,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:41:47,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 240 [2020-10-27 00:41:47,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:47,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-10-27 00:41:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:47,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:47,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:47,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:41:47,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:47,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 00:41:47,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:47,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:41:47,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:41:47,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:41:47,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-27 00:41:47,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588073230] [2020-10-27 00:41:47,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:41:47,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:41:47,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680717526] [2020-10-27 00:41:47,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:41:47,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:41:47,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:41:47,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:41:47,956 INFO L87 Difference]: Start difference. First operand 13495 states and 18726 transitions. Second operand 7 states. [2020-10-27 00:41:48,127 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:41:51,934 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66