/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 04:06:42,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 04:06:42,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 04:06:42,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 04:06:42,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 04:06:42,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 04:06:42,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 04:06:42,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 04:06:42,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 04:06:42,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 04:06:42,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 04:06:42,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 04:06:42,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 04:06:42,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 04:06:42,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 04:06:42,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 04:06:42,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 04:06:42,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 04:06:42,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 04:06:42,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 04:06:42,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 04:06:42,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 04:06:42,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 04:06:42,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 04:06:42,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 04:06:42,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 04:06:42,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 04:06:42,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 04:06:42,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 04:06:42,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 04:06:42,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 04:06:42,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 04:06:42,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 04:06:42,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 04:06:42,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 04:06:42,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 04:06:42,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 04:06:42,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 04:06:42,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 04:06:42,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 04:06:42,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 04:06:42,202 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 04:06:42,239 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 04:06:42,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 04:06:42,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 04:06:42,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 04:06:42,244 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 04:06:42,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 04:06:42,245 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 04:06:42,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 04:06:42,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 04:06:42,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 04:06:42,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 04:06:42,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 04:06:42,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 04:06:42,247 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 04:06:42,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 04:06:42,247 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 04:06:42,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 04:06:42,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 04:06:42,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 04:06:42,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 04:06:42,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 04:06:42,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 04:06:42,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 04:06:42,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 04:06:42,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 04:06:42,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 04:06:42,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 04:06:42,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 04:06:42,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 04:06:42,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 04:06:42,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 04:06:42,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 04:06:42,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 04:06:42,721 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 04:06:42,722 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 04:06:42,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-10-27 04:06:42,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efba0e496/d1b862fd48db44268125d016d54f319d/FLAG3fafd87b6 [2020-10-27 04:06:43,473 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 04:06:43,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-10-27 04:06:43,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efba0e496/d1b862fd48db44268125d016d54f319d/FLAG3fafd87b6 [2020-10-27 04:06:43,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efba0e496/d1b862fd48db44268125d016d54f319d [2020-10-27 04:06:43,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 04:06:43,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 04:06:43,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 04:06:43,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 04:06:43,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 04:06:43,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:06:43" (1/1) ... [2020-10-27 04:06:43,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c7d27ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:43, skipping insertion in model container [2020-10-27 04:06:43,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:06:43" (1/1) ... [2020-10-27 04:06:43,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 04:06:43,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 04:06:44,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:06:44,042 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 04:06:44,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 04:06:44,074 INFO L208 MainTranslator]: Completed translation [2020-10-27 04:06:44,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:44 WrapperNode [2020-10-27 04:06:44,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 04:06:44,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 04:06:44,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 04:06:44,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 04:06:44,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:44" (1/1) ... [2020-10-27 04:06:44,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:44" (1/1) ... [2020-10-27 04:06:44,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:44" (1/1) ... [2020-10-27 04:06:44,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:44" (1/1) ... [2020-10-27 04:06:44,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:44" (1/1) ... [2020-10-27 04:06:44,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:44" (1/1) ... [2020-10-27 04:06:44,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:44" (1/1) ... [2020-10-27 04:06:44,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 04:06:44,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 04:06:44,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 04:06:44,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 04:06:44,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 04:06:44,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 04:06:44,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 04:06:44,182 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 04:06:44,182 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-27 04:06:44,183 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-10-27 04:06:44,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 04:06:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 04:06:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 04:06:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 04:06:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 04:06:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 04:06:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-27 04:06:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-10-27 04:06:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 04:06:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 04:06:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 04:06:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 04:06:44,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 04:06:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 04:06:44,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 04:06:44,435 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 04:06:44,435 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 04:06:44,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:06:44 BoogieIcfgContainer [2020-10-27 04:06:44,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 04:06:44,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 04:06:44,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 04:06:44,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 04:06:44,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:06:43" (1/3) ... [2020-10-27 04:06:44,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b93fd76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:06:44, skipping insertion in model container [2020-10-27 04:06:44,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:06:44" (2/3) ... [2020-10-27 04:06:44,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b93fd76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:06:44, skipping insertion in model container [2020-10-27 04:06:44,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:06:44" (3/3) ... [2020-10-27 04:06:44,466 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2020-10-27 04:06:44,480 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 04:06:44,485 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 04:06:44,500 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 04:06:44,534 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 04:06:44,534 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 04:06:44,535 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 04:06:44,535 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 04:06:44,535 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 04:06:44,535 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 04:06:44,535 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 04:06:44,535 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 04:06:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-27 04:06:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 04:06:44,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:44,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:06:44,586 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:44,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:44,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1481297807, now seen corresponding path program 1 times [2020-10-27 04:06:44,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:44,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449264912] [2020-10-27 04:06:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:44,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:44,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:45,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:45,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 04:06:45,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:06:45,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-27 04:06:45,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:45,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:06:45,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:06:45,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 04:06:45,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 04:06:45,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:06:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:45,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:45,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:45,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:06:45,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:45,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 04:06:45,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:45,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:45,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:45,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:45,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:45,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:06:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:45,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:45,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:45,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:06:45,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:45,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 04:06:45,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:45,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 04:06:45,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 04:06:45,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 04:06:45,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 04:06:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:06:45,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449264912] [2020-10-27 04:06:45,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:06:45,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 04:06:45,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744517905] [2020-10-27 04:06:45,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 04:06:45,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:06:45,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 04:06:45,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 04:06:45,646 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 6 states. [2020-10-27 04:06:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:06:45,980 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-10-27 04:06:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 04:06:45,983 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-27 04:06:45,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:06:46,004 INFO L225 Difference]: With dead ends: 42 [2020-10-27 04:06:46,005 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 04:06:46,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:06:46,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 04:06:46,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-27 04:06:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 04:06:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-27 04:06:46,082 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 15 [2020-10-27 04:06:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:06:46,082 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-27 04:06:46,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 04:06:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-27 04:06:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 04:06:46,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:46,087 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] [2020-10-27 04:06:46,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 04:06:46,088 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:46,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:46,092 INFO L82 PathProgramCache]: Analyzing trace with hash 262491562, now seen corresponding path program 1 times [2020-10-27 04:06:46,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:46,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102815188] [2020-10-27 04:06:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:46,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:46,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:46,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:46,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 04:06:46,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:06:46,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 654 [2020-10-27 04:06:46,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:46,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:06:46,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:06:46,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 04:06:46,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:06:46,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:06:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:46,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:46,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:46,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:06:46,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:46,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 04:06:46,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:46,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:46,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:46,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:46,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 04:06:46,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:06:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:46,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:46,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:46,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 04:06:46,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:46,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 04:06:46,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:46,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 04:06:46,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 04:06:46,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 04:06:46,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:46,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:46,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:46,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:46,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:06:46,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:46,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 04:06:46,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:46,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 04:06:46,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:46,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 04:06:46,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 04:06:47,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102815188] [2020-10-27 04:06:47,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 04:06:47,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 04:06:47,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261681117] [2020-10-27 04:06:47,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 04:06:47,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:06:47,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 04:06:47,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 04:06:47,020 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2020-10-27 04:06:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:06:47,415 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-27 04:06:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 04:06:47,415 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 04:06:47,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:06:47,417 INFO L225 Difference]: With dead ends: 36 [2020-10-27 04:06:47,417 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 04:06:47,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-27 04:06:47,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 04:06:47,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-27 04:06:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 04:06:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-27 04:06:47,428 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-10-27 04:06:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:06:47,428 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-27 04:06:47,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 04:06:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-27 04:06:47,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 04:06:47,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:47,430 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 04:06:47,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 04:06:47,430 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:47,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:47,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1067256061, now seen corresponding path program 1 times [2020-10-27 04:06:47,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:47,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771994709] [2020-10-27 04:06:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:47,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:47,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:48,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:48,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 04:06:48,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:06:48,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-27 04:06:48,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:48,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 04:06:48,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:06:48,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 04:06:48,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:48,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:06:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:48,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:48,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:48,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:06:48,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:48,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 04:06:48,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:48,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:48,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:48,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:48,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:48,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:06:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:48,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:48,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:48,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 04:06:48,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:48,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-27 04:06:48,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:48,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 04:06:48,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 04:06:48,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 04:06:48,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:48,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:48,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:48,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:48,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 04:06:48,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:48,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 04:06:48,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:48,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 04:06:48,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:48,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 04:06:48,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:48,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:48,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:48,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:48,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:06:48,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:48,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 04:06:48,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 04:06:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 04:06:48,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 04:06:48,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771994709] [2020-10-27 04:06:48,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 04:06:48,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 04:06:48,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351471501] [2020-10-27 04:06:48,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 04:06:48,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:06:48,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 04:06:48,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 04:06:48,277 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2020-10-27 04:06:48,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:06:48,584 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-27 04:06:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 04:06:48,585 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 04:06:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:06:48,586 INFO L225 Difference]: With dead ends: 42 [2020-10-27 04:06:48,586 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 04:06:48,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-27 04:06:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 04:06:48,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-10-27 04:06:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 04:06:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-27 04:06:48,596 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2020-10-27 04:06:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:06:48,596 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-27 04:06:48,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 04:06:48,596 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-27 04:06:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 04:06:48,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:48,598 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 04:06:48,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 04:06:48,598 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:48,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:48,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1416908450, now seen corresponding path program 1 times [2020-10-27 04:06:48,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:48,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940836271] [2020-10-27 04:06:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:48,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:48,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:49,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:49,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 04:06:49,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:06:49,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1132 [2020-10-27 04:06:49,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:49,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 04:06:49,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:06:49,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 04:06:49,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:49,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:06:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:49,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:49,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:49,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:06:49,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 04:06:49,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:49,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:49,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:49,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:06:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:49,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:49,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:49,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 04:06:49,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:49,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 04:06:49,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:49,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 04:06:49,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 04:06:49,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 04:06:49,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:49,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:49,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:49,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:49,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 04:06:49,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:49,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 04:06:49,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:49,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 04:06:49,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:49,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 04:06:49,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:06:49,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:49,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:50,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:50,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 04:06:50,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:50,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 04:06:50,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:50,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 04:06:50,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:50,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 04:06:50,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:06:50,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:50,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:50,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:50,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:06:50,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:50,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:06:50,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:50,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 04:06:50,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:50,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 04:06:50,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:06:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 04:06:50,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940836271] [2020-10-27 04:06:50,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 04:06:50,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 04:06:50,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975798680] [2020-10-27 04:06:50,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 04:06:50,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:06:50,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 04:06:50,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 04:06:50,081 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 11 states. [2020-10-27 04:06:50,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:06:50,487 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-27 04:06:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 04:06:50,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 04:06:50,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:06:50,489 INFO L225 Difference]: With dead ends: 48 [2020-10-27 04:06:50,489 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 04:06:50,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-27 04:06:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 04:06:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-10-27 04:06:50,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 04:06:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-27 04:06:50,499 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 33 [2020-10-27 04:06:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:06:50,499 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-27 04:06:50,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 04:06:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-27 04:06:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 04:06:50,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:50,501 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:06:50,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 04:06:50,501 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:50,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1482575991, now seen corresponding path program 2 times [2020-10-27 04:06:50,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:50,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006968303] [2020-10-27 04:06:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:50,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:50,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:51,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:51,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 04:06:51,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 04:06:51,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 939 [2020-10-27 04:06:51,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:51,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 04:06:51,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 04:06:51,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 04:06:51,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:51,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 04:06:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:51,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:51,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:51,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 04:06:51,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:51,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 04:06:51,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:51,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 04:06:51,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:51,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 04:06:51,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:06:51,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 04:06:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:51,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:51,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:51,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 04:06:51,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:51,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 04:06:51,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:51,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 04:06:51,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 04:06:51,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 04:06:51,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:51,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:51,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:51,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:51,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 04:06:51,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:51,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 04:06:51,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:51,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 04:06:51,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:51,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 04:06:51,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:51,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:51,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:51,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:51,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 04:06:51,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:51,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 04:06:51,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:51,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 04:06:51,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:51,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 04:06:51,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:06:51,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:51,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:51,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:51,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 04:06:51,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:51,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 04:06:51,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:51,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 04:06:51,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:51,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 04:06:51,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 04:06:51,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-27 04:06:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 04:06:51,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 04:06:51,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 04:06:51,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 04:06:51,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 04:06:51,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 04:06:51,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 04:06:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 04:06:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 04:06:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 04:06:51,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 04:06:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-27 04:06:51,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006968303] [2020-10-27 04:06:51,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 04:06:51,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 04:06:51,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106592829] [2020-10-27 04:06:51,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 04:06:51,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 04:06:51,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 04:06:51,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 04:06:51,882 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2020-10-27 04:06:52,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 04:06:52,370 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-27 04:06:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 04:06:52,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-27 04:06:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 04:06:52,374 INFO L225 Difference]: With dead ends: 54 [2020-10-27 04:06:52,374 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 04:06:52,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-10-27 04:06:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 04:06:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-27 04:06:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 04:06:52,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-27 04:06:52,391 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 39 [2020-10-27 04:06:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 04:06:52,392 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-27 04:06:52,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 04:06:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-27 04:06:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 04:06:52,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 04:06:52,396 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 04:06:52,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 04:06:52,396 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 04:06:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 04:06:52,400 INFO L82 PathProgramCache]: Analyzing trace with hash -487565550, now seen corresponding path program 2 times [2020-10-27 04:06:52,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 04:06:52,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303663375] [2020-10-27 04:06:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 04:06:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 04:06:52,415 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 04:06:52,415 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 04:06:52,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 04:06:52,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 04:06:52 BoogieIcfgContainer [2020-10-27 04:06:52,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 04:06:52,448 INFO L168 Benchmark]: Toolchain (without parser) took 8617.56 ms. Allocated memory was 154.1 MB in the beginning and 268.4 MB in the end (delta: 114.3 MB). Free memory was 130.2 MB in the beginning and 212.8 MB in the end (delta: -82.6 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:52,449 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 154.1 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 04:06:52,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.79 ms. Allocated memory is still 154.1 MB. Free memory was 129.5 MB in the beginning and 120.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:52,453 INFO L168 Benchmark]: Boogie Preprocessor took 32.96 ms. Allocated memory is still 154.1 MB. Free memory was 120.3 MB in the beginning and 119.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:52,458 INFO L168 Benchmark]: RCFGBuilder took 346.45 ms. Allocated memory is still 154.1 MB. Free memory was 119.0 MB in the beginning and 138.1 MB in the end (delta: -19.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:52,459 INFO L168 Benchmark]: TraceAbstraction took 7985.40 ms. Allocated memory was 154.1 MB in the beginning and 268.4 MB in the end (delta: 114.3 MB). Free memory was 138.0 MB in the beginning and 212.8 MB in the end (delta: -74.8 MB). Peak memory consumption was 39.5 MB. Max. memory is 8.0 GB. [2020-10-27 04:06:52,470 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 154.1 MB. Free memory is still 128.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 240.79 ms. Allocated memory is still 154.1 MB. Free memory was 129.5 MB in the beginning and 120.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.96 ms. Allocated memory is still 154.1 MB. Free memory was 120.3 MB in the beginning and 119.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 346.45 ms. Allocated memory is still 154.1 MB. Free memory was 119.0 MB in the beginning and 138.1 MB in the end (delta: -19.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7985.40 ms. Allocated memory was 154.1 MB in the beginning and 268.4 MB in the end (delta: 114.3 MB). Free memory was 138.0 MB in the beginning and 212.8 MB in the end (delta: -74.8 MB). Peak memory consumption was 39.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L20] int input = 5; [L21] CALL, EXPR id(input) [L10] COND FALSE !(x==0) [L11] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L10] COND FALSE !(x==0) [L11] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L10] COND FALSE !(x==0) [L11] CALL, EXPR id2(x-1) [L15] COND TRUE x==0 [L15] return 0; [L11] RET, EXPR id2(x-1) [L11] return id2(x-1) + 1; [L16] RET, EXPR id(x-1) [L16] return id(x-1) + 1; [L11] RET, EXPR id2(x-1) [L11] return id2(x-1) + 1; [L16] RET, EXPR id(x-1) [L16] return id(x-1) + 1; [L11] RET, EXPR id2(x-1) [L11] return id2(x-1) + 1; [L21] RET, EXPR id(input) [L21] int result = id(input); [L22] COND TRUE result == 5 [L23] CALL reach_error() [L4] __assert_fail("0", "id2_i5_o5-1.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 96 SDtfs, 170 SDslu, 199 SDs, 0 SdLazy, 487 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 11964 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 15/34 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...