/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:07:28,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:07:28,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:07:28,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:07:28,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:07:28,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:07:28,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:07:28,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:07:28,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:07:28,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:07:28,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:07:28,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:07:28,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:07:28,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:07:28,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:07:28,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:07:28,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:07:28,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:07:28,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:07:28,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:07:28,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:07:28,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:07:28,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:07:28,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:07:28,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:07:28,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:07:28,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:07:28,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:07:28,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:07:28,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:07:28,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:07:28,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:07:28,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:07:28,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:07:28,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:07:28,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:07:28,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:07:28,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:07:28,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:07:28,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:07:28,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:07:28,270 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 14:07:28,313 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:07:28,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:07:28,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:07:28,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:07:28,319 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:07:28,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:07:28,320 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:07:28,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:07:28,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:07:28,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:07:28,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:07:28,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:07:28,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:07:28,323 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:07:28,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:07:28,324 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:07:28,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:07:28,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:07:28,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:07:28,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:07:28,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:07:28,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:07:28,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:07:28,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:07:28,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:07:28,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:07:28,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:07:28,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:07:28,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:07:28,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:07:28,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:07:28,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:07:28,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:07:28,900 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:07:28,901 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:07:28,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label20.c [2020-10-28 14:07:29,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcafdd263/c00d9ff2bc1e4aa68627df5ca1576287/FLAG914d3f55d [2020-10-28 14:07:30,461 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:07:30,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label20.c [2020-10-28 14:07:30,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcafdd263/c00d9ff2bc1e4aa68627df5ca1576287/FLAG914d3f55d [2020-10-28 14:07:30,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcafdd263/c00d9ff2bc1e4aa68627df5ca1576287 [2020-10-28 14:07:30,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:07:30,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:07:30,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:07:30,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:07:30,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:07:30,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:07:30" (1/1) ... [2020-10-28 14:07:30,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33672ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:30, skipping insertion in model container [2020-10-28 14:07:30,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:07:30" (1/1) ... [2020-10-28 14:07:30,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:07:30,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:07:33,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:07:33,312 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:07:34,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:07:34,783 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:07:34,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:34 WrapperNode [2020-10-28 14:07:34,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:07:34,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:07:34,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:07:34,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:07:34,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:34" (1/1) ... [2020-10-28 14:07:34,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:34" (1/1) ... [2020-10-28 14:07:34,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:34" (1/1) ... [2020-10-28 14:07:34,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:34" (1/1) ... [2020-10-28 14:07:35,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:34" (1/1) ... [2020-10-28 14:07:35,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:34" (1/1) ... [2020-10-28 14:07:35,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:34" (1/1) ... [2020-10-28 14:07:35,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:07:35,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:07:35,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:07:35,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:07:35,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:07:35,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:07:35,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:07:35,685 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:07:35,685 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:07:35,685 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:07:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:07:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:07:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:07:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:07:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:07:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:07:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:07:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:07:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:07:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:07:35,689 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:07:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:07:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:07:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:07:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:07:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:07:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:07:35,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:07:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:07:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:07:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:07:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:07:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:07:35,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:07:52,356 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:07:52,356 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:07:52,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:07:52 BoogieIcfgContainer [2020-10-28 14:07:52,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:07:52,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:07:52,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:07:52,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:07:52,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:07:30" (1/3) ... [2020-10-28 14:07:52,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b47002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:07:52, skipping insertion in model container [2020-10-28 14:07:52,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:07:34" (2/3) ... [2020-10-28 14:07:52,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b47002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:07:52, skipping insertion in model container [2020-10-28 14:07:52,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:07:52" (3/3) ... [2020-10-28 14:07:52,378 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label20.c [2020-10-28 14:07:52,394 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:07:52,402 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:07:52,420 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:07:52,480 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:07:52,480 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:07:52,480 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:07:52,480 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:07:52,480 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:07:52,481 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:07:52,481 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:07:52,481 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:07:52,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:07:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:07:52,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:07:52,560 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] [2020-10-28 14:07:52,561 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:07:52,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:07:52,569 INFO L82 PathProgramCache]: Analyzing trace with hash 162938141, now seen corresponding path program 1 times [2020-10-28 14:07:52,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:07:52,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047938063] [2020-10-28 14:07:52,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:07:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:07:52,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:53,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:07:53,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:07:53,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:07:53,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-28 14:07:53,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:07:53,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:07:53,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:07:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:07:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 14:07:53,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:07:53,591 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:07:53,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:07:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:07:53,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:07:53,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:07:53,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:07:53,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:07:53,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-28 14:07:53,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:07:53,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:07:53,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:07:53,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:07:53,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:07:53,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:07:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:07:53,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047938063] [2020-10-28 14:07:53,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:07:53,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:07:53,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265167065] [2020-10-28 14:07:53,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:07:53,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:07:53,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:07:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:07:53,757 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-28 14:07:53,960 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:08:27,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:08:27,223 INFO L93 Difference]: Finished difference Result 5036 states and 9459 transitions. [2020-10-28 14:08:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:08:27,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-28 14:08:27,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:08:27,270 INFO L225 Difference]: With dead ends: 5036 [2020-10-28 14:08:27,271 INFO L226 Difference]: Without dead ends: 3191 [2020-10-28 14:08:27,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:08:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2020-10-28 14:08:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3185. [2020-10-28 14:08:27,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3185 states. [2020-10-28 14:08:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 4966 transitions. [2020-10-28 14:08:27,557 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 4966 transitions. Word has length 50 [2020-10-28 14:08:27,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:08:27,561 INFO L481 AbstractCegarLoop]: Abstraction has 3185 states and 4966 transitions. [2020-10-28 14:08:27,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:08:27,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 4966 transitions. [2020-10-28 14:08:27,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 14:08:27,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:08:27,583 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:08:27,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:08:27,584 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:08:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:08:27,585 INFO L82 PathProgramCache]: Analyzing trace with hash 55848255, now seen corresponding path program 1 times [2020-10-28 14:08:27,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:08:27,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964145525] [2020-10-28 14:08:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:08:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:08:27,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:27,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:28,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:28,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:29,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:08:29,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 14:08:29,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:08:29,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2211 [2020-10-28 14:08:29,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:08:29,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:08:29,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:08:29,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-28 14:08:29,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:08:29,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:08:30,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:08:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:08:30,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:30,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:08:30,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:08:30,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:08:30,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:08:30,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:08:30,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:08:30,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:08:30,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:08:30,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:08:30,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:08:30,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:08:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:08:30,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:08:30,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:08:30,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:08:30,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:08:30,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-28 14:08:30,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:08:30,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:08:30,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:08:30,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 14:08:30,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:08:30,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:08:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:08:30,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964145525] [2020-10-28 14:08:30,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:08:30,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:08:30,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315197655] [2020-10-28 14:08:30,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:08:30,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:08:30,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:08:30,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:08:30,259 INFO L87 Difference]: Start difference. First operand 3185 states and 4966 transitions. Second operand 5 states. [2020-10-28 14:09:16,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:09:16,696 INFO L93 Difference]: Finished difference Result 9220 states and 14514 transitions. [2020-10-28 14:09:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:09:16,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2020-10-28 14:09:16,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:09:16,750 INFO L225 Difference]: With dead ends: 9220 [2020-10-28 14:09:16,750 INFO L226 Difference]: Without dead ends: 6041 [2020-10-28 14:09:16,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:09:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6041 states. [2020-10-28 14:09:16,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6041 to 6025. [2020-10-28 14:09:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6025 states. [2020-10-28 14:09:16,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 8359 transitions. [2020-10-28 14:09:16,986 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 8359 transitions. Word has length 123 [2020-10-28 14:09:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:09:16,989 INFO L481 AbstractCegarLoop]: Abstraction has 6025 states and 8359 transitions. [2020-10-28 14:09:16,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:09:16,990 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 8359 transitions. [2020-10-28 14:09:16,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 14:09:16,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:09:16,995 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:09:16,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:09:16,996 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:09:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:09:16,998 INFO L82 PathProgramCache]: Analyzing trace with hash 40329537, now seen corresponding path program 1 times [2020-10-28 14:09:16,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:09:16,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662116600] [2020-10-28 14:09:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:09:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:09:17,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:17,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:17,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:18,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:09:18,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 14:09:18,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:09:18,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1781 [2020-10-28 14:09:18,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:09:18,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:09:18,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:09:18,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:09:18,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 14:09:18,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:09:19,051 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:09:19,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:09:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:09:19,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:19,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:09:19,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:09:19,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:09:19,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 14:09:19,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:09:19,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:09:19,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:09:19,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:09:19,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:09:19,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:09:19,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:09:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:09:19,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:09:19,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:09:19,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 14:09:19,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:09:19,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-28 14:09:19,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:09:19,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:09:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:09:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:09:19,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 14:09:19,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:09:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:09:19,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662116600] [2020-10-28 14:09:19,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:09:19,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:09:19,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352358] [2020-10-28 14:09:19,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:09:19,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:09:19,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:09:19,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:09:19,442 INFO L87 Difference]: Start difference. First operand 6025 states and 8359 transitions. Second operand 7 states. [2020-10-28 14:09:19,626 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:10:40,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:10:40,180 INFO L93 Difference]: Finished difference Result 18150 states and 25895 transitions. [2020-10-28 14:10:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:10:40,184 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-10-28 14:10:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:10:40,260 INFO L225 Difference]: With dead ends: 18150 [2020-10-28 14:10:40,260 INFO L226 Difference]: Without dead ends: 12131 [2020-10-28 14:10:40,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:10:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12131 states. [2020-10-28 14:10:40,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12131 to 11925. [2020-10-28 14:10:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11925 states. [2020-10-28 14:10:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11925 states to 11925 states and 15373 transitions. [2020-10-28 14:10:40,620 INFO L78 Accepts]: Start accepts. Automaton has 11925 states and 15373 transitions. Word has length 123 [2020-10-28 14:10:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:10:40,620 INFO L481 AbstractCegarLoop]: Abstraction has 11925 states and 15373 transitions. [2020-10-28 14:10:40,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:10:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 11925 states and 15373 transitions. [2020-10-28 14:10:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 14:10:40,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:10:40,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:10:40,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:10:40,623 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:10:40,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:10:40,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1138077870, now seen corresponding path program 1 times [2020-10-28 14:10:40,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:10:40,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750673218] [2020-10-28 14:10:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:10:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:10:40,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:40,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:41,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:42,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:10:42,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-28 14:10:42,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:10:42,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1859 [2020-10-28 14:10:42,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:10:42,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:10:42,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:10:42,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:10:42,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 14:10:42,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:10:42,699 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:10:42,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:10:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:10:42,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:42,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:10:42,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:10:42,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:10:42,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 14:10:42,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:10:42,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:10:42,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:10:42,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:10:42,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:10:42,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:10:42,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:10:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:10:42,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:10:42,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:10:42,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:10:42,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:10:42,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-28 14:10:42,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:10:42,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:10:42,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:10:42,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:10:42,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 14:10:42,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:10:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:10:43,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750673218] [2020-10-28 14:10:43,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:10:43,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:10:43,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538990481] [2020-10-28 14:10:43,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:10:43,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:10:43,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:10:43,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:10:43,142 INFO L87 Difference]: Start difference. First operand 11925 states and 15373 transitions. Second operand 7 states. [2020-10-28 14:10:43,304 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:10:46,712 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66