/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_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:46:22,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:46:22,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:46:22,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:46:22,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:46:22,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:46:22,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:46:22,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:46:22,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:46:22,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:46:22,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:46:22,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:46:22,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:46:22,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:46:22,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:46:22,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:46:22,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:46:22,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:46:22,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:46:22,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:46:22,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:46:22,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:46:22,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:46:22,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:46:22,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:46:22,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:46:22,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:46:22,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:46:22,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:46:22,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:46:22,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:46:22,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:46:22,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:46:22,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:46:22,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:46:22,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:46:22,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:46:22,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:46:22,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:46:22,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:46:22,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:46:22,223 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 08:46:22,263 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:46:22,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:46:22,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:46:22,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:46:22,267 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:46:22,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:46:22,267 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:46:22,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:46:22,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:46:22,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:46:22,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:46:22,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:46:22,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:46:22,270 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:46:22,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:46:22,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:46:22,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:46:22,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:46:22,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:46:22,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:46:22,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:46:22,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:46:22,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:46:22,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:46:22,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:46:22,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:46:22,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:46:22,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:46:22,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:46:22,275 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:46:22,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:46:22,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:46:22,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:46:22,889 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:46:22,890 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:46:22,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label15.c [2020-10-29 08:46:22,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca56c14aa/eb47fd1904d34d118e6ab1e3530ceb54/FLAGa515ebabd [2020-10-29 08:46:24,296 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:46:24,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label15.c [2020-10-29 08:46:24,355 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca56c14aa/eb47fd1904d34d118e6ab1e3530ceb54/FLAGa515ebabd [2020-10-29 08:46:24,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca56c14aa/eb47fd1904d34d118e6ab1e3530ceb54 [2020-10-29 08:46:24,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:46:24,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:46:24,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:46:24,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:46:24,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:46:24,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:46:24" (1/1) ... [2020-10-29 08:46:24,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@670e345a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:24, skipping insertion in model container [2020-10-29 08:46:24,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:46:24" (1/1) ... [2020-10-29 08:46:24,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:46:24,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:46:27,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:46:27,371 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:46:28,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:46:28,635 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:46:28,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:28 WrapperNode [2020-10-29 08:46:28,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:46:28,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:46:28,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:46:28,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:46:28,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:28" (1/1) ... [2020-10-29 08:46:28,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:28" (1/1) ... [2020-10-29 08:46:28,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:28" (1/1) ... [2020-10-29 08:46:28,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:28" (1/1) ... [2020-10-29 08:46:28,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:28" (1/1) ... [2020-10-29 08:46:29,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:28" (1/1) ... [2020-10-29 08:46:29,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:28" (1/1) ... [2020-10-29 08:46:29,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:46:29,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:46:29,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:46:29,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:46:29,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:28" (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 08:46:29,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:46:29,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:46:29,427 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:46:29,427 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:46:29,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:46:29,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:46:29,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:46:29,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:46:29,429 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:46:29,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:46:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:46:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:46:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:46:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:46:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:46:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:46:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:46:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:46:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:46:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:46:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:46:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:46:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:46:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:46:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:46:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:46:29,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:46:29,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:46:29,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:46:46,271 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:46:46,272 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:46:46,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:46:46 BoogieIcfgContainer [2020-10-29 08:46:46,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:46:46,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:46:46,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:46:46,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:46:46,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:46:24" (1/3) ... [2020-10-29 08:46:46,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6ef863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:46:46, skipping insertion in model container [2020-10-29 08:46:46,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:46:28" (2/3) ... [2020-10-29 08:46:46,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6ef863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:46:46, skipping insertion in model container [2020-10-29 08:46:46,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:46:46" (3/3) ... [2020-10-29 08:46:46,289 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label15.c [2020-10-29 08:46:46,304 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:46:46,312 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:46:46,327 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:46:46,364 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:46:46,364 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:46:46,364 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:46:46,364 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:46:46,364 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:46:46,365 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:46:46,365 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:46:46,365 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:46:46,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:46:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-29 08:46:46,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:46:46,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:46:46,425 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:46:46,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:46:46,432 INFO L82 PathProgramCache]: Analyzing trace with hash 478301438, now seen corresponding path program 1 times [2020-10-29 08:46:46,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:46:46,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681404346] [2020-10-29 08:46:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:46:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:46:46,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:47,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:46:47,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 08:46:47,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:46:47,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 645 [2020-10-29 08:46:47,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:46:47,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:46:47,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:46:47,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:46:47,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 08:46:47,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:46:47,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:46:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:46:47,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:47,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:46:47,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:46:47,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:46:47,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 08:46:47,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:46:47,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:46:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:46:47,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:46:47,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:46:47,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:46:47,677 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 08:46:47,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681404346] [2020-10-29 08:46:47,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:46:47,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 08:46:47,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21134341] [2020-10-29 08:46:47,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:46:47,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:46:47,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:46:47,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:46:47,710 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-29 08:47:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:47:29,857 INFO L93 Difference]: Finished difference Result 6485 states and 12305 transitions. [2020-10-29 08:47:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 08:47:29,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-29 08:47:29,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:47:29,922 INFO L225 Difference]: With dead ends: 6485 [2020-10-29 08:47:29,922 INFO L226 Difference]: Without dead ends: 4636 [2020-10-29 08:47:29,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:47:29,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2020-10-29 08:47:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 4630. [2020-10-29 08:47:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4630 states. [2020-10-29 08:47:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4630 states to 4630 states and 7750 transitions. [2020-10-29 08:47:30,266 INFO L78 Accepts]: Start accepts. Automaton has 4630 states and 7750 transitions. Word has length 65 [2020-10-29 08:47:30,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:47:30,268 INFO L481 AbstractCegarLoop]: Abstraction has 4630 states and 7750 transitions. [2020-10-29 08:47:30,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:47:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4630 states and 7750 transitions. [2020-10-29 08:47:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-29 08:47:30,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:47:30,276 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 08:47:30,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:47:30,277 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:47:30,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:47:30,279 INFO L82 PathProgramCache]: Analyzing trace with hash -642420091, now seen corresponding path program 1 times [2020-10-29 08:47:30,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:47:30,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653285599] [2020-10-29 08:47:30,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:47:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:47:30,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:30,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:31,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:32,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:32,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:47:32,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-29 08:47:32,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:47:32,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2390 [2020-10-29 08:47:32,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:47:32,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:47:32,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 08:47:32,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:47:32,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-29 08:47:32,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:47:33,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:47:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:47:33,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:33,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:47:33,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:47:33,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:47:33,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 08:47:33,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:47:33,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:47:33,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:47:33,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:47:33,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:47:33,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:47:33,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:47:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:47:33,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:33,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:47:33,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 08:47:33,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:47:33,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-29 08:47:33,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:47:33,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:47:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:47:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:47:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 08:47:33,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:47:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 08:47:33,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653285599] [2020-10-29 08:47:33,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:47:33,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:47:33,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465071972] [2020-10-29 08:47:33,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 08:47:33,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:47:33,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 08:47:33,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:47:33,470 INFO L87 Difference]: Start difference. First operand 4630 states and 7750 transitions. Second operand 6 states. [2020-10-29 08:48:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:48:25,247 INFO L93 Difference]: Finished difference Result 13678 states and 23267 transitions. [2020-10-29 08:48:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 08:48:25,252 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2020-10-29 08:48:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:48:25,344 INFO L225 Difference]: With dead ends: 13678 [2020-10-29 08:48:25,344 INFO L226 Difference]: Without dead ends: 9054 [2020-10-29 08:48:25,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 08:48:25,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9054 states. [2020-10-29 08:48:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9054 to 8980. [2020-10-29 08:48:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8980 states. [2020-10-29 08:48:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8980 states to 8980 states and 13210 transitions. [2020-10-29 08:48:25,825 INFO L78 Accepts]: Start accepts. Automaton has 8980 states and 13210 transitions. Word has length 143 [2020-10-29 08:48:25,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:48:25,831 INFO L481 AbstractCegarLoop]: Abstraction has 8980 states and 13210 transitions. [2020-10-29 08:48:25,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 08:48:25,831 INFO L276 IsEmpty]: Start isEmpty. Operand 8980 states and 13210 transitions. [2020-10-29 08:48:25,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-29 08:48:25,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:48:25,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:48:25,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:48:25,854 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:48:25,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:48:25,855 INFO L82 PathProgramCache]: Analyzing trace with hash -914781838, now seen corresponding path program 1 times [2020-10-29 08:48:25,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:48:25,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332021795] [2020-10-29 08:48:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:48:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:25,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:26,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:26,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:28,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:48:28,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-29 08:48:28,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:48:28,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2151 [2020-10-29 08:48:28,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:48:28,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:48:28,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:48:28,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-29 08:48:28,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 08:48:28,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:48:28,312 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:48:28,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:48:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:28,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:28,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:48:28,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:48:28,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:48:28,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 08:48:28,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:48:28,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:48:28,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:48:28,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:48:28,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:48:28,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:48:28,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:48:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:48:28,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:48:28,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:48:28,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 08:48:28,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:48:28,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-29 08:48:28,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:48:28,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:48:28,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:48:28,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:48:28,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:48:28,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:48:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:48:28,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332021795] [2020-10-29 08:48:28,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:48:28,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:48:28,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032352920] [2020-10-29 08:48:28,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:48:28,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:48:28,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:48:28,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:48:28,627 INFO L87 Difference]: Start difference. First operand 8980 states and 13210 transitions. Second operand 5 states. [2020-10-29 08:48:29,540 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:49:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:49:16,455 INFO L93 Difference]: Finished difference Result 26517 states and 39838 transitions. [2020-10-29 08:49:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:49:16,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-10-29 08:49:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:49:16,545 INFO L225 Difference]: With dead ends: 26517 [2020-10-29 08:49:16,545 INFO L226 Difference]: Without dead ends: 17543 [2020-10-29 08:49:16,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:49:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17543 states. [2020-10-29 08:49:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17543 to 17489. [2020-10-29 08:49:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17489 states. [2020-10-29 08:49:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17489 states to 17489 states and 23934 transitions. [2020-10-29 08:49:17,130 INFO L78 Accepts]: Start accepts. Automaton has 17489 states and 23934 transitions. Word has length 146 [2020-10-29 08:49:17,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:49:17,132 INFO L481 AbstractCegarLoop]: Abstraction has 17489 states and 23934 transitions. [2020-10-29 08:49:17,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:49:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 17489 states and 23934 transitions. [2020-10-29 08:49:17,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-29 08:49:17,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:49:17,137 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:49:17,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:49:17,137 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:49:17,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:49:17,138 INFO L82 PathProgramCache]: Analyzing trace with hash 625648648, now seen corresponding path program 1 times [2020-10-29 08:49:17,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:49:17,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652714828] [2020-10-29 08:49:17,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:49:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:17,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:17,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:18,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:19,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:19,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-29 08:49:19,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:49:19,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2381 [2020-10-29 08:49:19,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:19,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:19,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:49:19,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:49:19,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-29 08:49:19,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:49:19,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:49:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:19,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:19,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:19,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:49:19,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:49:19,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 08:49:19,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:19,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:19,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:49:19,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:49:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:49:19,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:49:19,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:49:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:49:19,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:49:20,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:49:20,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 08:49:20,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:49:20,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-29 08:49:20,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:49:20,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:49:20,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:49:20,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:49:20,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-29 08:49:20,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:49:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:49:20,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652714828] [2020-10-29 08:49:20,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:49:20,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:49:20,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14166609] [2020-10-29 08:49:20,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:49:20,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:49:20,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:49:20,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:49:20,184 INFO L87 Difference]: Start difference. First operand 17489 states and 23934 transitions. Second operand 7 states. [2020-10-29 08:49:22,188 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:50:24,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:50:24,368 INFO L93 Difference]: Finished difference Result 51535 states and 73372 transitions. [2020-10-29 08:50:24,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:50:24,372 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 166 [2020-10-29 08:50:24,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:50:24,639 INFO L225 Difference]: With dead ends: 51535 [2020-10-29 08:50:24,639 INFO L226 Difference]: Without dead ends: 34052 [2020-10-29 08:50:24,701 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 08:50:24,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34052 states.