/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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:44:02,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:44:02,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:44:02,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:44:02,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:44:02,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:44:02,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:44:02,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:44:02,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:44:02,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:44:02,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:44:02,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:44:02,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:44:02,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:44:02,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:44:02,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:44:02,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:44:02,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:44:02,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:44:02,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:44:02,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:44:02,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:44:02,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:44:02,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:44:02,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:44:02,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:44:02,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:44:02,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:44:02,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:44:02,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:44:02,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:44:02,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:44:02,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:44:02,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:44:02,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:44:02,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:44:02,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:44:02,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:44:02,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:44:02,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:44:02,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:44:02,538 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 00:44:02,594 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:44:02,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:44:02,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:44:02,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:44:02,600 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:44:02,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:44:02,600 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:44:02,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:44:02,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:44:02,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:44:02,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:44:02,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:44:02,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:44:02,603 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:44:02,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:44:02,603 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:44:02,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:44:02,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:44:02,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:44:02,604 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:44:02,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:44:02,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:44:02,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:44:02,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:44:02,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:44:02,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:44:02,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:44:02,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:44:02,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:44:02,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:44:03,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:44:03,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:44:03,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:44:03,086 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:44:03,087 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:44:03,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label24.c [2020-10-27 00:44:03,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29271e0d1/8f8bd8af27554456b818ec924a929310/FLAGfe42864d6 [2020-10-27 00:44:04,532 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:44:04,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label24.c [2020-10-27 00:44:04,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29271e0d1/8f8bd8af27554456b818ec924a929310/FLAGfe42864d6 [2020-10-27 00:44:04,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/29271e0d1/8f8bd8af27554456b818ec924a929310 [2020-10-27 00:44:04,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:44:04,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:44:04,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:44:04,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:44:04,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:44:04,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:44:04" (1/1) ... [2020-10-27 00:44:04,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f84cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:44:04, skipping insertion in model container [2020-10-27 00:44:04,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:44:04" (1/1) ... [2020-10-27 00:44:04,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:44:05,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:44:07,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:44:07,391 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:44:08,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:44:09,033 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:44:09,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:44:09 WrapperNode [2020-10-27 00:44:09,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:44:09,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:44:09,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:44:09,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:44:09,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:44:09" (1/1) ... [2020-10-27 00:44:09,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:44:09" (1/1) ... [2020-10-27 00:44:09,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:44:09" (1/1) ... [2020-10-27 00:44:09,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:44:09" (1/1) ... [2020-10-27 00:44:09,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:44:09" (1/1) ... [2020-10-27 00:44:09,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:44:09" (1/1) ... [2020-10-27 00:44:09,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:44:09" (1/1) ... [2020-10-27 00:44:09,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:44:09,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:44:09,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:44:09,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:44:09,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:44:09" (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 00:44:09,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:44:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:44:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:44:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:44:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:44:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:44:09,957 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:44:09,957 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:44:09,957 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:44:09,957 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:44:09,957 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:44:09,957 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:44:09,958 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:44:09,958 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:44:09,958 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:44:09,958 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:44:09,958 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:44:09,958 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:44:09,958 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:44:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:44:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:44:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:44:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:44:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:44:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:44:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:44:09,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:44:09,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:44:09,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:44:29,825 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:44:29,827 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:44:29,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:44:29 BoogieIcfgContainer [2020-10-27 00:44:29,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:44:29,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:44:29,837 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:44:29,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:44:29,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:44:04" (1/3) ... [2020-10-27 00:44:29,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f619810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:44:29, skipping insertion in model container [2020-10-27 00:44:29,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:44:09" (2/3) ... [2020-10-27 00:44:29,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f619810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:44:29, skipping insertion in model container [2020-10-27 00:44:29,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:44:29" (3/3) ... [2020-10-27 00:44:29,846 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label24.c [2020-10-27 00:44:29,860 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:44:29,867 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:44:29,883 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:44:29,924 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:44:29,924 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:44:29,924 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:44:29,924 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:44:29,924 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:44:29,925 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:44:29,925 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:44:29,925 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:44:29,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:44:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 00:44:29,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:44:29,985 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] [2020-10-27 00:44:29,985 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:44:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:44:29,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1935912005, now seen corresponding path program 1 times [2020-10-27 00:44:30,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:44:30,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976902248] [2020-10-27 00:44:30,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:44:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:44:30,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:30,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:44:30,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 00:44:30,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:44:30,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 642 [2020-10-27 00:44:30,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:44:30,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:44:30,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:44:30,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 00:44:30,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:44:31,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:44:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:44:31,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:44:31,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:44:31,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:44:31,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:44:31,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 00:44:31,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:44:31,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:44:31,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:44:31,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:44:31,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:44:31,150 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 00:44:31,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976902248] [2020-10-27 00:44:31,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:44:31,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:44:31,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809437586] [2020-10-27 00:44:31,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:44:31,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:44:31,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:44:31,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:44:31,184 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-27 00:45:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:45:00,847 INFO L93 Difference]: Finished difference Result 5091 states and 9567 transitions. [2020-10-27 00:45:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:45:00,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-10-27 00:45:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:45:00,898 INFO L225 Difference]: With dead ends: 5091 [2020-10-27 00:45:00,899 INFO L226 Difference]: Without dead ends: 3246 [2020-10-27 00:45:00,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:45:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2020-10-27 00:45:01,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 3179. [2020-10-27 00:45:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3179 states. [2020-10-27 00:45:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 5850 transitions. [2020-10-27 00:45:01,147 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 5850 transitions. Word has length 52 [2020-10-27 00:45:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:45:01,148 INFO L481 AbstractCegarLoop]: Abstraction has 3179 states and 5850 transitions. [2020-10-27 00:45:01,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:45:01,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 5850 transitions. [2020-10-27 00:45:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 00:45:01,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:45:01,155 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:45:01,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:45:01,156 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:45:01,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:45:01,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2109461394, now seen corresponding path program 1 times [2020-10-27 00:45:01,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:45:01,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676670899] [2020-10-27 00:45:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:45:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:01,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:01,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:01,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:02,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:03,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:03,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 00:45:03,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:45:03,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2072 [2020-10-27 00:45:03,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:03,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:45:03,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:45:03,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:45:03,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:45:03,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:45:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:03,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:03,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:03,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:45:03,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:45:03,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 00:45:03,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:03,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:45:03,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:45:03,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:45:03,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:45:03,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:45:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:03,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:03,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:03,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:03,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:45:03,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:45:03,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-27 00:45:03,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:03,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:45:03,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:45:03,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:45:03,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:45:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:45:03,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676670899] [2020-10-27 00:45:03,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:45:03,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:45:03,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834871133] [2020-10-27 00:45:03,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:45:03,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:45:03,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:45:03,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:45:03,869 INFO L87 Difference]: Start difference. First operand 3179 states and 5850 transitions. Second operand 7 states. [2020-10-27 00:45:51,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:45:51,878 INFO L93 Difference]: Finished difference Result 9422 states and 17587 transitions. [2020-10-27 00:45:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:45:51,880 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-10-27 00:45:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:45:51,927 INFO L225 Difference]: With dead ends: 9422 [2020-10-27 00:45:51,927 INFO L226 Difference]: Without dead ends: 6249 [2020-10-27 00:45:51,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:45:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6249 states. [2020-10-27 00:45:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6249 to 6092. [2020-10-27 00:45:52,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6092 states. [2020-10-27 00:45:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6092 states to 6092 states and 9444 transitions. [2020-10-27 00:45:52,195 INFO L78 Accepts]: Start accepts. Automaton has 6092 states and 9444 transitions. Word has length 123 [2020-10-27 00:45:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:45:52,196 INFO L481 AbstractCegarLoop]: Abstraction has 6092 states and 9444 transitions. [2020-10-27 00:45:52,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:45:52,196 INFO L276 IsEmpty]: Start isEmpty. Operand 6092 states and 9444 transitions. [2020-10-27 00:45:52,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 00:45:52,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:45:52,200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:45:52,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:45:52,200 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:45:52,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:45:52,201 INFO L82 PathProgramCache]: Analyzing trace with hash 2130289281, now seen corresponding path program 1 times [2020-10-27 00:45:52,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:45:52,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87430691] [2020-10-27 00:45:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:45:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:52,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:52,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:53,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:54,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:54,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 00:45:54,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:45:54,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2296 [2020-10-27 00:45:54,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:54,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:45:54,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:45:54,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 00:45:54,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:45:54,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:45:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:54,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:54,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:54,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:45:54,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:45:54,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:45:54,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:54,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:45:54,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:45:54,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:45:54,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:45:54,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:45:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:45:54,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:45:55,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:45:55,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 00:45:55,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:45:55,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-27 00:45:55,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:45:55,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:45:55,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:45:55,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 00:45:55,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:45:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:45:55,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87430691] [2020-10-27 00:45:55,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:45:55,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:45:55,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988803973] [2020-10-27 00:45:55,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:45:55,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:45:55,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:45:55,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:45:55,227 INFO L87 Difference]: Start difference. First operand 6092 states and 9444 transitions. Second operand 7 states. [2020-10-27 00:45:57,223 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:46:45,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:46:45,157 INFO L93 Difference]: Finished difference Result 18442 states and 28933 transitions. [2020-10-27 00:46:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:46:45,159 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2020-10-27 00:46:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:46:45,228 INFO L225 Difference]: With dead ends: 18442 [2020-10-27 00:46:45,228 INFO L226 Difference]: Without dead ends: 12356 [2020-10-27 00:46:45,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:46:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12356 states. [2020-10-27 00:46:45,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12356 to 12100. [2020-10-27 00:46:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12100 states. [2020-10-27 00:46:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12100 states to 12100 states and 16740 transitions. [2020-10-27 00:46:45,596 INFO L78 Accepts]: Start accepts. Automaton has 12100 states and 16740 transitions. Word has length 154 [2020-10-27 00:46:45,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:46:45,599 INFO L481 AbstractCegarLoop]: Abstraction has 12100 states and 16740 transitions. [2020-10-27 00:46:45,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:46:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 12100 states and 16740 transitions. [2020-10-27 00:46:45,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-27 00:46:45,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:46:45,609 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:46:45,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:46:45,609 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:46:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:46:45,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1304048758, now seen corresponding path program 1 times [2020-10-27 00:46:45,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:46:45,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574018931] [2020-10-27 00:46:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:46:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:45,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:45,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:45,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:48,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:48,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:50,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:50,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-27 00:46:50,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:46:50,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 00:46:50,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:50,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:46:50,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:46:50,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:46:50,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:46:50,834 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:46:50,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:46:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:50,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:50,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:50,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:46:50,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:46:50,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:46:50,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:50,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:46:50,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:46:50,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:46:50,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:46:50,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:46:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:50,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:51,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:51,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 00:46:51,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:46:51,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 00:46:51,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:51,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:46:51,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:46:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:46:51,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:46:51,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-27 00:46:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:46:51,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:46:51,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:46:51,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 00:46:51,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:46:51,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 00:46:51,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:46:51,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:46:51,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-27 00:46:51,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:46:51,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:46:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 88 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:46:51,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574018931] [2020-10-27 00:46:51,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:46:51,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:46:51,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644102698] [2020-10-27 00:46:51,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:46:51,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:46:51,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:46:51,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:46:51,267 INFO L87 Difference]: Start difference. First operand 12100 states and 16740 transitions. Second operand 7 states. [2020-10-27 00:46:51,441 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:47:53,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:47:53,555 INFO L93 Difference]: Finished difference Result 30445 states and 43874 transitions. [2020-10-27 00:47:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:47:53,559 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 211 [2020-10-27 00:47:53,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:47:53,634 INFO L225 Difference]: With dead ends: 30445 [2020-10-27 00:47:53,635 INFO L226 Difference]: Without dead ends: 18351 [2020-10-27 00:47:53,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:47:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18351 states. [2020-10-27 00:47:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18351 to 17861. [2020-10-27 00:47:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17861 states. [2020-10-27 00:47:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17861 states to 17861 states and 24505 transitions. [2020-10-27 00:47:54,215 INFO L78 Accepts]: Start accepts. Automaton has 17861 states and 24505 transitions. Word has length 211 [2020-10-27 00:47:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:47:54,217 INFO L481 AbstractCegarLoop]: Abstraction has 17861 states and 24505 transitions. [2020-10-27 00:47:54,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:47:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 17861 states and 24505 transitions. [2020-10-27 00:47:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-27 00:47:54,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:47:54,223 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:47:54,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:47:54,223 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:47:54,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:47:54,224 INFO L82 PathProgramCache]: Analyzing trace with hash 470924244, now seen corresponding path program 1 times [2020-10-27 00:47:54,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:47:54,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499948470] [2020-10-27 00:47:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:47:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:47:54,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:54,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:55,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:56,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:47:56,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-27 00:47:56,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:47:56,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1772 [2020-10-27 00:47:56,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:47:56,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:47:56,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:47:56,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-27 00:47:56,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:47:56,268 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:47:56,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:47:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:47:56,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:56,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:47:56,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:47:56,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:47:56,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 00:47:56,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:47:56,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:47:56,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:47:56,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:47:56,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:47:56,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:47:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:47:56,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:47:56,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:47:56,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 00:47:56,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:47:56,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 375 [2020-10-27 00:47:56,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:47:56,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:47:56,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:47:56,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-27 00:47:56,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:47:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:47:57,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499948470] [2020-10-27 00:47:57,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:47:57,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:47:57,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541692637] [2020-10-27 00:47:57,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:47:57,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:47:57,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:47:57,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:47:57,009 INFO L87 Difference]: Start difference. First operand 17861 states and 24505 transitions. Second operand 7 states. [2020-10-27 00:47:57,204 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 68