/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:46:31,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:46:31,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:46:31,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:46:31,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:46:31,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:46:31,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:46:31,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:46:31,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:46:31,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:46:31,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:46:31,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:46:31,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:46:31,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:46:31,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:46:31,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:46:31,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:46:31,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:46:31,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:46:31,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:46:31,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:46:32,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:46:32,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:46:32,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:46:32,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:46:32,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:46:32,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:46:32,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:46:32,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:46:32,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:46:32,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:46:32,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:46:32,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:46:32,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:46:32,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:46:32,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:46:32,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:46:32,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:46:32,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:46:32,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:46:32,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:46:32,051 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 [2020-10-29 08:46:32,083 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:46:32,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:46:32,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:46:32,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:46:32,086 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:46:32,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:46:32,087 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:46:32,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:46:32,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:46:32,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:46:32,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:46:32,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:46:32,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:46:32,089 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:46:32,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:46:32,089 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:46:32,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:46:32,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:46:32,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:46:32,091 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:46:32,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:46:32,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:46:32,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:46:32,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:46:32,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:46:32,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:46:32,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:46:32,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:46:32,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:46:32,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:46:32,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:46:32,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:46:32,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:46:32,666 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:46:32,667 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:46:32,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label18.c [2020-10-29 08:46:32,768 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7dae9a7f8/1731344ca8404fae9b0cc272ae7e9687/FLAG59e2104bc [2020-10-29 08:46:34,026 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:46:34,032 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label18.c [2020-10-29 08:46:34,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7dae9a7f8/1731344ca8404fae9b0cc272ae7e9687/FLAG59e2104bc [2020-10-29 08:46:34,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7dae9a7f8/1731344ca8404fae9b0cc272ae7e9687 [2020-10-29 08:46:34,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:46:34,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:46:34,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:46:34,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:46:34,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:46:34,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:46:34" (1/1) ... [2020-10-29 08:46:34,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1732d00d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:34, skipping insertion in model container [2020-10-29 08:46:34,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:46:34" (1/1) ... [2020-10-29 08:46:34,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:46:34,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:46:36,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:46:36,896 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:46:38,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:46:38,179 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:46:38,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:38 WrapperNode [2020-10-29 08:46:38,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:46:38,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:46:38,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:46:38,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:46:38,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:38" (1/1) ... [2020-10-29 08:46:38,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:38" (1/1) ... [2020-10-29 08:46:38,312 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:38" (1/1) ... [2020-10-29 08:46:38,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:38" (1/1) ... [2020-10-29 08:46:38,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:38" (1/1) ... [2020-10-29 08:46:38,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:38" (1/1) ... [2020-10-29 08:46:38,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:38" (1/1) ... [2020-10-29 08:46:38,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:46:38,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:46:38,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:46:38,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:46:38,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:38" (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 [2020-10-29 08:46:39,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:46:39,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:46:39,050 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:46:39,051 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:46:39,051 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:46:39,051 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:46:39,051 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:46:39,051 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:46:39,051 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:46:39,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:46:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:46:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:46:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:46:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:46:39,052 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:46:39,053 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:46:39,053 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:46:39,053 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:46:39,053 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:46:39,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:46:39,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:46:39,053 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:46:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:46:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:46:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:46:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:46:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:46:39,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:46:39,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:46:54,669 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:46:54,671 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:46:54,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:46:54 BoogieIcfgContainer [2020-10-29 08:46:54,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:46:54,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:46:54,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:46:54,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:46:54,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:46:34" (1/3) ... [2020-10-29 08:46:54,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8add0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:46:54, skipping insertion in model container [2020-10-29 08:46:54,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:38" (2/3) ... [2020-10-29 08:46:54,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8add0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:46:54, skipping insertion in model container [2020-10-29 08:46:54,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:46:54" (3/3) ... [2020-10-29 08:46:54,693 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label18.c [2020-10-29 08:46:54,712 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:46:54,721 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:46:54,738 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:46:54,792 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:46:54,792 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:46:54,792 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:46:54,792 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:46:54,792 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:46:54,793 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:46:54,793 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:46:54,793 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:46:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:46:54,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 08:46:54,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:46:54,875 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] [2020-10-29 08:46:54,876 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:46:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:46:54,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1156502962, now seen corresponding path program 1 times [2020-10-29 08:46:54,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:46:54,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816425550] [2020-10-29 08:46:54,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:46:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:46:55,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:55,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:46:55,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 08:46:55,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:46:55,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-29 08:46:55,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:46:55,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:46:55,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:46:55,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:46:55,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 08:46:55,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:46:56,129 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:46:56,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:46:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:46:56,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:56,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:46:56,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:46:56,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:46:56,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-29 08:46:56,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:46:56,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:46:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:46:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:46:56,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:46:56,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:46:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:46:56,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816425550] [2020-10-29 08:46:56,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:46:56,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 08:46:56,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987944131] [2020-10-29 08:46:56,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:46:56,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:46:56,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:46:56,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:46:56,375 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-29 08:46:56,555 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:47:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:47:46,138 INFO L93 Difference]: Finished difference Result 6577 states and 12487 transitions. [2020-10-29 08:47:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 08:47:46,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-29 08:47:46,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:47:46,213 INFO L225 Difference]: With dead ends: 6577 [2020-10-29 08:47:46,213 INFO L226 Difference]: Without dead ends: 4728 [2020-10-29 08:47:46,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:47:46,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4728 states. [2020-10-29 08:47:46,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4728 to 4641. [2020-10-29 08:47:46,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4641 states. [2020-10-29 08:47:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 7458 transitions. [2020-10-29 08:47:46,609 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 7458 transitions. Word has length 37 [2020-10-29 08:47:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:47:46,612 INFO L481 AbstractCegarLoop]: Abstraction has 4641 states and 7458 transitions. [2020-10-29 08:47:46,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:47:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 7458 transitions. [2020-10-29 08:47:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-29 08:47:46,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:47:46,632 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:47:46,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:47:46,633 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:47:46,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:47:46,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1324709718, now seen corresponding path program 1 times [2020-10-29 08:47:46,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:47:46,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278507743] [2020-10-29 08:47:46,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:47:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:47:46,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:47,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:48,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:48,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:47:48,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 08:47:48,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:47:48,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1679 [2020-10-29 08:47:48,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:47:48,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:47:48,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:47:48,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:47:48,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:47:48,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:47:48,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:47:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:47:48,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:48,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:47:48,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:47:48,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:47:48,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 08:47:48,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:47:48,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:47:48,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:47:48,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:47:48,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:47:48,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:47:48,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:47:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:47:48,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:48,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:47:48,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:47:48,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:47:48,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-29 08:47:48,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:47:48,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:47:48,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:47:48,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:47:48,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:47:48,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:47:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:47:49,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278507743] [2020-10-29 08:47:49,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:47:49,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:47:49,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406753910] [2020-10-29 08:47:49,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:47:49,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:47:49,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:47:49,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:47:49,193 INFO L87 Difference]: Start difference. First operand 4641 states and 7458 transitions. Second operand 7 states. [2020-10-29 08:47:49,353 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:48:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:48:36,814 INFO L93 Difference]: Finished difference Result 13780 states and 22508 transitions. [2020-10-29 08:48:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:48:36,818 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 112 [2020-10-29 08:48:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:48:36,889 INFO L225 Difference]: With dead ends: 13780 [2020-10-29 08:48:36,889 INFO L226 Difference]: Without dead ends: 9145 [2020-10-29 08:48:36,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:48:36,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2020-10-29 08:48:37,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 9021. [2020-10-29 08:48:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9021 states. [2020-10-29 08:48:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9021 states to 9021 states and 13184 transitions. [2020-10-29 08:48:37,329 INFO L78 Accepts]: Start accepts. Automaton has 9021 states and 13184 transitions. Word has length 112 [2020-10-29 08:48:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:48:37,333 INFO L481 AbstractCegarLoop]: Abstraction has 9021 states and 13184 transitions. [2020-10-29 08:48:37,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:48:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 9021 states and 13184 transitions. [2020-10-29 08:48:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-29 08:48:37,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:48:37,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:48:37,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:48:37,347 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:48:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:48:37,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1459511784, now seen corresponding path program 1 times [2020-10-29 08:48:37,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:48:37,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440195310] [2020-10-29 08:48:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:48:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:37,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:37,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:39,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:40,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:48:40,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-29 08:48:40,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:48:40,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2795 [2020-10-29 08:48:40,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:48:40,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:48:40,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:48:40,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:48:40,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-29 08:48:40,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:48:40,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:48:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:40,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:40,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:48:40,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:48:40,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:48:40,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 08:48:40,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:48:40,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:48:40,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:48:40,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:48:40,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:48:40,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:48:40,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:48:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:40,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:40,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:48:40,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 08:48:40,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:48:40,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-29 08:48:40,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:48:40,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:48:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:48:40,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:48:40,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-29 08:48:40,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:48:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:48:41,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440195310] [2020-10-29 08:48:41,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:48:41,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:48:41,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487701918] [2020-10-29 08:48:41,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:48:41,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:48:41,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:48:41,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:48:41,072 INFO L87 Difference]: Start difference. First operand 9021 states and 13184 transitions. Second operand 7 states. [2020-10-29 08:48:41,225 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:48:43,210 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:49:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:49:39,413 INFO L93 Difference]: Finished difference Result 27339 states and 41565 transitions. [2020-10-29 08:49:39,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:49:39,420 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 138 [2020-10-29 08:49:39,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:49:39,529 INFO L225 Difference]: With dead ends: 27339 [2020-10-29 08:49:39,529 INFO L226 Difference]: Without dead ends: 18324 [2020-10-29 08:49:39,561 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 [2020-10-29 08:49:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18324 states. [2020-10-29 08:49:40,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18324 to 18053. [2020-10-29 08:49:40,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18053 states. [2020-10-29 08:49:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18053 states to 18053 states and 24213 transitions. [2020-10-29 08:49:40,329 INFO L78 Accepts]: Start accepts. Automaton has 18053 states and 24213 transitions. Word has length 138 [2020-10-29 08:49:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:49:40,335 INFO L481 AbstractCegarLoop]: Abstraction has 18053 states and 24213 transitions. [2020-10-29 08:49:40,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:49:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 18053 states and 24213 transitions. [2020-10-29 08:49:40,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-29 08:49:40,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:49:40,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:49:40,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:49:40,344 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:49:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:49:40,346 INFO L82 PathProgramCache]: Analyzing trace with hash 487847012, now seen corresponding path program 1 times [2020-10-29 08:49:40,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:49:40,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901558007] [2020-10-29 08:49:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:49:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:40,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:40,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:40,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:41,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:42,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:42,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-29 08:49:42,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:49:42,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1758 [2020-10-29 08:49:42,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:42,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:42,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:49:42,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:49:42,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-29 08:49:42,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:49:42,339 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:49:42,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:49:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:42,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:42,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:42,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:49:42,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:49:42,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 08:49:42,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:42,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:42,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:49:42,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:49:42,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:49:42,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 08:49:42,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:49:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:42,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:42,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:42,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:42,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 08:49:42,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:49:42,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-29 08:49:42,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:42,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:42,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:49:42,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:49:42,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 08:49:42,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:49:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:49:42,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901558007] [2020-10-29 08:49:42,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:49:42,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:49:42,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939165237] [2020-10-29 08:49:42,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:49:42,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:49:42,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:49:42,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:49:42,869 INFO L87 Difference]: Start difference. First operand 18053 states and 24213 transitions. Second operand 7 states. [2020-10-29 08:49:43,066 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 68