/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:34:46,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:34:46,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:34:46,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:34:46,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:34:46,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:34:46,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:34:46,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:34:46,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:34:46,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:34:46,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:34:47,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:34:47,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:34:47,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:34:47,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:34:47,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:34:47,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:34:47,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:34:47,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:34:47,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:34:47,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:34:47,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:34:47,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:34:47,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:34:47,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:34:47,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:34:47,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:34:47,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:34:47,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:34:47,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:34:47,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:34:47,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:34:47,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:34:47,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:34:47,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:34:47,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:34:47,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:34:47,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:34:47,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:34:47,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:34:47,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:34:47,064 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:34:47,097 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:34:47,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:34:47,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:34:47,100 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:34:47,100 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:34:47,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:34:47,100 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:34:47,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:34:47,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:34:47,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:34:47,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:34:47,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:34:47,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:34:47,102 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:34:47,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:34:47,102 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:34:47,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:34:47,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:34:47,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:34:47,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:34:47,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:34:47,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:34:47,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:34:47,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:34:47,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:34:47,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:34:47,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:34:47,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:34:47,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:34:47,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:34:47,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:34:47,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:34:47,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:34:47,607 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:34:47,607 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:34:47,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label58.c [2020-10-27 19:34:47,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92747cbd3/85f46899d7aa42cfb6a2a2d56fe0f366/FLAG17583a206 [2020-10-27 19:34:49,112 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:34:49,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label58.c [2020-10-27 19:34:49,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92747cbd3/85f46899d7aa42cfb6a2a2d56fe0f366/FLAG17583a206 [2020-10-27 19:34:49,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92747cbd3/85f46899d7aa42cfb6a2a2d56fe0f366 [2020-10-27 19:34:49,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:34:49,342 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:34:49,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:34:49,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:34:49,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:34:49,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:34:49" (1/1) ... [2020-10-27 19:34:49,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d463e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:34:49, skipping insertion in model container [2020-10-27 19:34:49,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:34:49" (1/1) ... [2020-10-27 19:34:49,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:34:49,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:34:51,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:34:51,940 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:34:53,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:34:53,236 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:34:53,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:34:53 WrapperNode [2020-10-27 19:34:53,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:34:53,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:34:53,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:34:53,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:34:53,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:34:53" (1/1) ... [2020-10-27 19:34:53,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:34:53" (1/1) ... [2020-10-27 19:34:53,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:34:53" (1/1) ... [2020-10-27 19:34:53,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:34:53" (1/1) ... [2020-10-27 19:34:53,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:34:53" (1/1) ... [2020-10-27 19:34:53,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:34:53" (1/1) ... [2020-10-27 19:34:53,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:34:53" (1/1) ... [2020-10-27 19:34:54,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:34:54,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:34:54,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:34:54,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:34:54,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:34:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:34:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:34:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:34:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:34:54,270 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:34:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:34:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:34:54,271 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:34:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:34:54,272 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:34:54,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:34:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:34:54,274 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:34:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:34:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:34:54,275 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:34:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:34:54,276 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:34:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:34:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:34:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:34:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:34:54,277 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:34:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:34:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:34:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:34:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:34:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:34:54,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:34:54,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:35:10,411 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:35:10,411 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:35:10,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:35:10 BoogieIcfgContainer [2020-10-27 19:35:10,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:35:10,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:35:10,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:35:10,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:35:10,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:34:49" (1/3) ... [2020-10-27 19:35:10,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6e9bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:35:10, skipping insertion in model container [2020-10-27 19:35:10,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:34:53" (2/3) ... [2020-10-27 19:35:10,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6e9bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:35:10, skipping insertion in model container [2020-10-27 19:35:10,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:35:10" (3/3) ... [2020-10-27 19:35:10,428 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label58.c [2020-10-27 19:35:10,443 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:35:10,450 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:35:10,467 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:35:10,510 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:35:10,510 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:35:10,511 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:35:10,511 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:35:10,511 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:35:10,511 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:35:10,511 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:35:10,511 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:35:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:35:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 19:35:10,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:35:10,577 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] [2020-10-27 19:35:10,578 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:35:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:35:10,586 INFO L82 PathProgramCache]: Analyzing trace with hash -622462523, now seen corresponding path program 1 times [2020-10-27 19:35:10,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:35:10,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571728423] [2020-10-27 19:35:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:35:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:35:10,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:11,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:35:11,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:35:11,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:35:11,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 661 [2020-10-27 19:35:11,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:35:11,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:35:11,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:35:11,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 19:35:11,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:35:11,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:35:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:35:11,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:11,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:35:11,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:35:11,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:35:11,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 19:35:11,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:35:11,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:35:11,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:35:11,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:35:11,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:35:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:35:11,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571728423] [2020-10-27 19:35:11,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:35:11,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:35:11,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677789807] [2020-10-27 19:35:11,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:35:11,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:35:11,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:35:11,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:35:11,779 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 19:35:44,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:35:44,585 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-27 19:35:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:35:44,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-27 19:35:44,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:35:44,644 INFO L225 Difference]: With dead ends: 5116 [2020-10-27 19:35:44,644 INFO L226 Difference]: Without dead ends: 3271 [2020-10-27 19:35:44,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:35:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-27 19:35:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-27 19:35:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-27 19:35:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-27 19:35:44,934 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 20 [2020-10-27 19:35:44,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:35:44,936 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-27 19:35:44,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:35:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-27 19:35:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 19:35:44,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:35:44,947 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:35:44,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:35:44,948 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:35:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:35:44,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1643555765, now seen corresponding path program 1 times [2020-10-27 19:35:44,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:35:44,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792964223] [2020-10-27 19:35:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:35:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:35:45,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:45,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:46,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:35:46,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 19:35:46,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:35:46,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1384 [2020-10-27 19:35:46,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:35:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:35:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-27 19:35:46,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:35:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:35:46,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:35:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:35:46,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:46,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:35:46,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:35:46,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:35:46,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 19:35:46,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:35:46,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:35:46,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:35:46,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:35:46,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:35:46,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:35:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:35:46,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:46,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:35:46,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 19:35:46,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:35:46,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 19:35:46,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:35:46,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:35:46,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:35:46,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 19:35:46,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:35:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:35:46,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792964223] [2020-10-27 19:35:46,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:35:46,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:35:46,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883740129] [2020-10-27 19:35:46,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:35:46,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:35:46,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:35:46,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:35:46,832 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 6 states. [2020-10-27 19:36:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:36:37,107 INFO L93 Difference]: Finished difference Result 12085 states and 21174 transitions. [2020-10-27 19:36:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:36:37,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2020-10-27 19:36:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:36:37,171 INFO L225 Difference]: With dead ends: 12085 [2020-10-27 19:36:37,171 INFO L226 Difference]: Without dead ends: 8891 [2020-10-27 19:36:37,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:36:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8891 states. [2020-10-27 19:36:37,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8891 to 8870. [2020-10-27 19:36:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8870 states. [2020-10-27 19:36:37,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8870 states to 8870 states and 13927 transitions. [2020-10-27 19:36:37,597 INFO L78 Accepts]: Start accepts. Automaton has 8870 states and 13927 transitions. Word has length 92 [2020-10-27 19:36:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:36:37,598 INFO L481 AbstractCegarLoop]: Abstraction has 8870 states and 13927 transitions. [2020-10-27 19:36:37,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:36:37,599 INFO L276 IsEmpty]: Start isEmpty. Operand 8870 states and 13927 transitions. [2020-10-27 19:36:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 19:36:37,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:36:37,606 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:36:37,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:36:37,606 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:36:37,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:36:37,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1964097021, now seen corresponding path program 1 times [2020-10-27 19:36:37,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:36:37,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151078764] [2020-10-27 19:36:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:36:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:36:37,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:36:38,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:36:38,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:36:38,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 19:36:38,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:36:38,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1207 [2020-10-27 19:36:38,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:36:38,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:36:38,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 130 [2020-10-27 19:36:38,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:36:38,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:36:39,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:36:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:36:39,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:36:39,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:36:39,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:36:39,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:36:39,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:36:39,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:36:39,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:36:39,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:36:39,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:36:39,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:36:39,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:36:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:36:39,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:36:39,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:36:39,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 19:36:39,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:36:39,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-27 19:36:39,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:36:39,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:36:39,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:36:39,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 19:36:39,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:36:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:36:39,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151078764] [2020-10-27 19:36:39,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:36:39,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:36:39,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870670861] [2020-10-27 19:36:39,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:36:39,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:36:39,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:36:39,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:36:39,424 INFO L87 Difference]: Start difference. First operand 8870 states and 13927 transitions. Second operand 5 states. [2020-10-27 19:37:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:37:31,408 INFO L93 Difference]: Finished difference Result 22029 states and 35483 transitions. [2020-10-27 19:37:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:37:31,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2020-10-27 19:37:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:37:31,474 INFO L225 Difference]: With dead ends: 22029 [2020-10-27 19:37:31,475 INFO L226 Difference]: Without dead ends: 13165 [2020-10-27 19:37:31,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:37:31,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13165 states. [2020-10-27 19:37:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13165 to 13116. [2020-10-27 19:37:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13116 states. [2020-10-27 19:37:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13116 states to 13116 states and 19542 transitions. [2020-10-27 19:37:31,852 INFO L78 Accepts]: Start accepts. Automaton has 13116 states and 19542 transitions. Word has length 140 [2020-10-27 19:37:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:37:31,852 INFO L481 AbstractCegarLoop]: Abstraction has 13116 states and 19542 transitions. [2020-10-27 19:37:31,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:37:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 13116 states and 19542 transitions. [2020-10-27 19:37:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 19:37:31,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:37:31,863 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 19:37:31,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:37:31,866 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:37:31,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:37:31,867 INFO L82 PathProgramCache]: Analyzing trace with hash -537616498, now seen corresponding path program 1 times [2020-10-27 19:37:31,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:37:31,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649187872] [2020-10-27 19:37:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:37:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:37:31,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:37:32,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:37:32,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:37:32,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:37:32,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-27 19:37:32,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:37:32,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 880 [2020-10-27 19:37:32,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:37:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:37:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-27 19:37:32,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:37:32,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:37:32,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:37:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:37:32,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:37:32,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:37:32,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:37:32,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:37:32,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:37:32,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:37:32,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:37:32,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:37:32,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:37:32,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:37:32,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:37:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:37:33,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:37:33,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:37:33,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 19:37:33,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:37:33,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-27 19:37:33,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:37:33,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:37:33,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-27 19:37:33,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:37:33,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:37:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:37:33,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649187872] [2020-10-27 19:37:33,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:37:33,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:37:33,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001466787] [2020-10-27 19:37:33,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:37:33,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:37:33,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:37:33,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:37:33,167 INFO L87 Difference]: Start difference. First operand 13116 states and 19542 transitions. Second operand 5 states. [2020-10-27 19:38:16,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:38:16,661 INFO L93 Difference]: Finished difference Result 38917 states and 59463 transitions. [2020-10-27 19:38:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:38:16,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-10-27 19:38:16,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:38:16,762 INFO L225 Difference]: With dead ends: 38917 [2020-10-27 19:38:16,763 INFO L226 Difference]: Without dead ends: 25807 [2020-10-27 19:38:16,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:38:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25807 states. [2020-10-27 19:38:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25807 to 25782. [2020-10-27 19:38:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25782 states. [2020-10-27 19:38:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25782 states to 25782 states and 38192 transitions. [2020-10-27 19:38:17,424 INFO L78 Accepts]: Start accepts. Automaton has 25782 states and 38192 transitions. Word has length 143 [2020-10-27 19:38:17,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:38:17,426 INFO L481 AbstractCegarLoop]: Abstraction has 25782 states and 38192 transitions. [2020-10-27 19:38:17,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:38:17,426 INFO L276 IsEmpty]: Start isEmpty. Operand 25782 states and 38192 transitions. [2020-10-27 19:38:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-27 19:38:17,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:38:17,443 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 19:38:17,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:38:17,444 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:38:17,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:38:17,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1708114528, now seen corresponding path program 1 times [2020-10-27 19:38:17,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:38:17,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543326369] [2020-10-27 19:38:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:38:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:38:17,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:38:18,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:38:18,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:38:22,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:38:22,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-10-27 19:38:22,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:38:22,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 19:38:22,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:38:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:38:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 302 [2020-10-27 19:38:22,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:38:22,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:38:22,726 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:38:22,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:38:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:38:22,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:38:22,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:38:22,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:38:22,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:38:22,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 19:38:22,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:38:22,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:38:22,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:38:22,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:38:22,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:38:22,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:38:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:38:22,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:38:22,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:38:22,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 19:38:22,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:38:22,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 19:38:22,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:38:22,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:38:22,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:38:22,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:38:22,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:38:22,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-27 19:38:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:38:22,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:38:23,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:38:23,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-27 19:38:23,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:38:23,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-27 19:38:23,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:38:23,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:38:23,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:38:23,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-27 19:38:23,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:38:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-27 19:38:23,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543326369] [2020-10-27 19:38:23,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:38:23,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:38:23,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973372493] [2020-10-27 19:38:23,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:38:23,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:38:23,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:38:23,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:38:23,310 INFO L87 Difference]: Start difference. First operand 25782 states and 38192 transitions. Second operand 5 states. [2020-10-27 19:38:23,457 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66