/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:22:29,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:22:29,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:22:29,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:22:29,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:22:29,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:22:29,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:22:29,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:22:29,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:22:29,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:22:29,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:22:29,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:22:29,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:22:29,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:22:29,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:22:29,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:22:29,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:22:29,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:22:29,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:22:29,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:22:29,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:22:29,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:22:29,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:22:29,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:22:29,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:22:29,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:22:29,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:22:29,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:22:29,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:22:29,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:22:29,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:22:29,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:22:29,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:22:29,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:22:29,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:22:29,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:22:29,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:22:29,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:22:29,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:22:29,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:22:29,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:22:29,256 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 [2020-09-21 11:22:29,303 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:22:29,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:22:29,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:22:29,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:22:29,306 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:22:29,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:22:29,306 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:22:29,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:22:29,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:22:29,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:22:29,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:22:29,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:22:29,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:22:29,309 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:22:29,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:22:29,309 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:22:29,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:22:29,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:22:29,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:22:29,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:22:29,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:22:29,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:22:29,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:22:29,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:22:29,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:22:29,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:22:29,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:22:29,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:22:29,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:22:29,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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.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;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:22:29,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:22:29,779 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:22:29,784 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:22:29,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:22:29,786 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:22:29,787 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-09-21 11:22:29,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f70c08b1b/cf216fa718b944a08d210840d79820b3/FLAG117bc02f4 [2020-09-21 11:22:30,402 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:22:30,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-09-21 11:22:30,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f70c08b1b/cf216fa718b944a08d210840d79820b3/FLAG117bc02f4 [2020-09-21 11:22:30,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f70c08b1b/cf216fa718b944a08d210840d79820b3 [2020-09-21 11:22:30,723 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:22:30,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:22:30,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:22:30,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:22:30,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:22:30,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:22:30" (1/1) ... [2020-09-21 11:22:30,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b865e63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:30, skipping insertion in model container [2020-09-21 11:22:30,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:22:30" (1/1) ... [2020-09-21 11:22:30,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:22:30,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:22:31,072 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-21 11:22:31,075 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-21 11:22:31,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:22:31,137 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:22:31,159 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-21 11:22:31,160 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-21 11:22:31,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:22:31,288 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:22:31,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:31 WrapperNode [2020-09-21 11:22:31,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:22:31,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:22:31,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:22:31,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:22:31,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:31" (1/1) ... [2020-09-21 11:22:31,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:31" (1/1) ... [2020-09-21 11:22:31,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:31" (1/1) ... [2020-09-21 11:22:31,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:31" (1/1) ... [2020-09-21 11:22:31,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:31" (1/1) ... [2020-09-21 11:22:31,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:31" (1/1) ... [2020-09-21 11:22:31,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:31" (1/1) ... [2020-09-21 11:22:31,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:22:31,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:22:31,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:22:31,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:22:31,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:31" (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 [2020-09-21 11:22:31,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:22:31,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:22:31,424 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:22:31,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:22:31,424 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-09-21 11:22:31,424 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-09-21 11:22:31,425 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-09-21 11:22:31,425 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-09-21 11:22:31,425 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-09-21 11:22:31,425 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-09-21 11:22:31,425 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:22:31,425 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-21 11:22:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 11:22:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 11:22:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 11:22:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:22:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 11:22:31,426 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:22:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:22:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:22:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:22:31,427 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-09-21 11:22:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 11:22:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:22:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 11:22:31,430 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-09-21 11:22:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 11:22:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-09-21 11:22:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:22:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:22:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-09-21 11:22:31,431 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-09-21 11:22:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-09-21 11:22:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:22:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-21 11:22:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:22:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:22:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:22:31,952 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:22:31,952 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:22:31,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:22:31 BoogieIcfgContainer [2020-09-21 11:22:31,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:22:31,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:22:31,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:22:31,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:22:31,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:22:30" (1/3) ... [2020-09-21 11:22:31,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c013cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:22:31, skipping insertion in model container [2020-09-21 11:22:31,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:22:31" (2/3) ... [2020-09-21 11:22:31,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c013cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:22:31, skipping insertion in model container [2020-09-21 11:22:31,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:22:31" (3/3) ... [2020-09-21 11:22:31,968 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2020-09-21 11:22:31,979 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:22:31,990 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:22:32,013 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:22:32,046 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:22:32,046 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:22:32,046 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:22:32,046 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:22:32,047 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:22:32,047 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:22:32,047 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:22:32,047 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:22:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2020-09-21 11:22:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 11:22:32,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:22:32,085 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] [2020-09-21 11:22:32,086 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:22:32,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:22:32,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1217563597, now seen corresponding path program 1 times [2020-09-21 11:22:32,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:22:32,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887212013] [2020-09-21 11:22:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:22:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:32,295 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:32,296 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:32,296 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:32,296 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:32,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-21 11:22:32,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:32,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:22:32,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:32,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:32,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-09-21 11:22:32,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:32,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:22:32,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:22:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:32,411 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:32,413 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:32,414 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:32,414 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:32,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:32,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:32,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 11:22:32,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:32,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:32,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:22:32,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:22:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:32,472 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:32,472 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:32,472 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:32,473 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:32,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:32,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:32,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:22:32,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:32,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:32,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:32,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:32,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:32,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:22:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:32,491 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:32,491 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:32,491 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:32,493 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:32,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:32,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:32,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:22:32,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:32,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:32,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:32,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:22:32,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 11:22:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:32,510 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:32,510 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:32,511 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:32,511 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:32,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:32,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:32,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:22:32,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:32,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:32,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:32,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:32,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-09-21 11:22:32,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 11:22:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:32,532 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:32,532 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:32,532 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:32,533 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:32,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:32,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:32,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:22:32,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:32,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:32,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 11:22:32,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:32,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:32,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 11:22:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:32,550 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:32,550 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:32,550 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:32,550 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:32,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:32,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:32,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:32,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:32,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:32,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:22:32,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:32,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:32,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 11:22:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:32,600 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:32,601 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:32,601 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:32,601 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:32,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:32,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:32,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:32,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:32,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:32,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:22:32,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:32,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:22:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:22:32,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887212013] [2020-09-21 11:22:32,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:22:32,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 11:22:32,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400061478] [2020-09-21 11:22:32,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:22:32,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:22:32,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:22:32,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:22:32,650 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 6 states. [2020-09-21 11:22:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:22:33,125 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2020-09-21 11:22:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:22:33,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-09-21 11:22:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:22:33,143 INFO L225 Difference]: With dead ends: 165 [2020-09-21 11:22:33,143 INFO L226 Difference]: Without dead ends: 93 [2020-09-21 11:22:33,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:22:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-21 11:22:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-09-21 11:22:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-21 11:22:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2020-09-21 11:22:33,214 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 44 [2020-09-21 11:22:33,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:22:33,215 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2020-09-21 11:22:33,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:22:33,215 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2020-09-21 11:22:33,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 11:22:33,219 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:22:33,219 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] [2020-09-21 11:22:33,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:22:33,220 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:22:33,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:22:33,220 INFO L82 PathProgramCache]: Analyzing trace with hash -471380145, now seen corresponding path program 1 times [2020-09-21 11:22:33,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:22:33,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111160875] [2020-09-21 11:22:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:22:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:33,300 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:33,300 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:33,300 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:33,300 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:33,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-21 11:22:33,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:33,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 11:22:33,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:22:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 11:22:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:22:33,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:33,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:22:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:33,388 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:33,388 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:33,389 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:33,389 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:33,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:33,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:33,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:33,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:33,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:33,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:22:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:33,413 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:33,413 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:33,414 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:33,414 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:33,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:33,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:33,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:33,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:33,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:33,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:33,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:22:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:33,422 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:33,422 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:33,423 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:33,423 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:33,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:33,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:33,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:33,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:33,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:33,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:33,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:33,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:33,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 11:22:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:33,437 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:33,437 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:33,437 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:33,437 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:33,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:33,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:33,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:22:33,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:33,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:22:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:22:33,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:33,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 11:22:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:33,490 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:33,491 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:33,491 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:33,491 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:33,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:33,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:33,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 11:22:33,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:33,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:22:33,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:22:33,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:22:33,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:33,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 11:22:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:33,562 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:33,563 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:33,563 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:33,563 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:33,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:33,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:33,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:33,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:33,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:33,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:22:33,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:33,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:33,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 11:22:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:33,598 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:33,599 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:33,599 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:33,599 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:33,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:33,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:33,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:33,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:33,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:22:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:33,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:22:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:22:33,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111160875] [2020-09-21 11:22:33,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:22:33,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 11:22:33,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411492711] [2020-09-21 11:22:33,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:22:33,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:22:33,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:22:33,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:22:33,619 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 11 states. [2020-09-21 11:22:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:22:34,373 INFO L93 Difference]: Finished difference Result 151 states and 194 transitions. [2020-09-21 11:22:34,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:22:34,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-21 11:22:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:22:34,377 INFO L225 Difference]: With dead ends: 151 [2020-09-21 11:22:34,377 INFO L226 Difference]: Without dead ends: 95 [2020-09-21 11:22:34,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:22:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-21 11:22:34,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-09-21 11:22:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-21 11:22:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-09-21 11:22:34,398 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 44 [2020-09-21 11:22:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:22:34,398 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-09-21 11:22:34,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:22:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-09-21 11:22:34,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 11:22:34,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:22:34,401 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-09-21 11:22:34,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:22:34,402 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:22:34,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:22:34,402 INFO L82 PathProgramCache]: Analyzing trace with hash 800610240, now seen corresponding path program 1 times [2020-09-21 11:22:34,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:22:34,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129435832] [2020-09-21 11:22:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:22:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:34,466 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:34,466 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:34,466 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:34,467 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:34,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-21 11:22:34,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:34,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 11:22:34,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:34,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:22:34,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:22:34,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:22:34,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:34,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:22:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:34,610 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:34,610 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:34,610 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:34,611 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:34,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:34,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:34,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:34,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:34,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:34,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:34,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:34,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:34,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:22:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:34,648 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:34,649 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:34,649 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:34,649 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:34,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:34,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:34,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 11:22:34,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:34,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:22:34,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:34,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:22:34,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:34,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:22:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:34,685 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:34,686 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:34,686 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:34,686 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:34,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:34,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:34,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:22:34,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:34,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:22:34,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:34,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:22:34,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:34,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 11:22:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:34,730 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:34,730 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:34,731 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:34,731 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:34,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:22:34,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:34,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 11:22:34,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:34,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:22:34,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:22:34,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:22:34,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:34,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:22:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:34,809 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:34,810 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:34,810 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:34,810 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:34,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:34,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:34,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:22:34,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:34,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:22:34,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:34,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:22:34,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:34,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 11:22:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:34,822 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:34,822 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:34,822 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:34,823 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:34,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:34,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:34,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:22:34,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:34,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:22:34,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:34,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:22:34,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:34,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 11:22:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:34,831 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:34,831 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:34,831 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:34,832 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:34,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:34,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:34,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:34,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:34,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:34,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:22:34,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:34,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:34,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 11:22:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:34,864 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:34,864 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:34,865 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:34,865 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:34,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:34,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:34,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:34,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:34,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:34,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:22:34,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:34,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:34,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-21 11:22:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:34,913 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:34,913 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:34,913 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:34,913 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:34,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:34,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:34,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:34,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:34,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:34,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:22:34,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:34,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-21 11:22:34,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129435832] [2020-09-21 11:22:34,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:22:34,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:22:34,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295099099] [2020-09-21 11:22:34,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:22:34,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:22:34,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:22:34,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:22:34,925 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 12 states. [2020-09-21 11:22:35,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:22:35,728 INFO L93 Difference]: Finished difference Result 161 states and 206 transitions. [2020-09-21 11:22:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:22:35,728 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-09-21 11:22:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:22:35,730 INFO L225 Difference]: With dead ends: 161 [2020-09-21 11:22:35,731 INFO L226 Difference]: Without dead ends: 94 [2020-09-21 11:22:35,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:22:35,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-21 11:22:35,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-09-21 11:22:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-21 11:22:35,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2020-09-21 11:22:35,754 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 56 [2020-09-21 11:22:35,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:22:35,754 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2020-09-21 11:22:35,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:22:35,755 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2020-09-21 11:22:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-21 11:22:35,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:22:35,757 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-21 11:22:35,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:22:35,758 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:22:35,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:22:35,758 INFO L82 PathProgramCache]: Analyzing trace with hash 487198237, now seen corresponding path program 1 times [2020-09-21 11:22:35,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:22:35,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854522707] [2020-09-21 11:22:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:22:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:35,848 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:35,848 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:35,848 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:35,848 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:35,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-09-21 11:22:35,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:35,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-21 11:22:35,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:35,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:22:35,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:22:35,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 11:22:35,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:35,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:22:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:35,908 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:35,908 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:35,908 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:35,909 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:35,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:35,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:35,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:35,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:35,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:35,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:35,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:35,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:22:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:35,956 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:35,956 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:35,957 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:35,957 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:35,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:22:35,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:35,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 11:22:35,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:35,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:22:35,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:35,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:22:35,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:36,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:22:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:36,006 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:36,007 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:36,007 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:36,007 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:36,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:36,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:36,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:22:36,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:22:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:36,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:22:36,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:36,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:22:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:36,017 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:36,017 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:36,018 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:36,018 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:36,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:36,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:36,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:36,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:36,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:22:36,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:36,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:22:36,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:36,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 11:22:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:36,029 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:36,030 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:36,030 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:36,030 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:36,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:36,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:36,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:22:36,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:36,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:22:36,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:22:36,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:22:36,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:36,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:22:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:36,070 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:36,070 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:36,070 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:36,070 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:36,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:22:36,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:36,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:36,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:36,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:36,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 11:22:36,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:36,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:36,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:22:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:36,078 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:36,078 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:36,078 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:36,079 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:36,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:36,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:36,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:36,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:36,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:36,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:36,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:36,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:36,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 11:22:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:36,084 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:36,084 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:36,084 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:36,084 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:36,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:36,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:36,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:36,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:36,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:36,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:36,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:36,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:36,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 11:22:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:36,089 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:36,089 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:36,090 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:36,090 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:36,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:36,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:36,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:22:36,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:22:36,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:36,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:36,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 11:22:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:36,108 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:36,108 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:36,108 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:36,108 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:36,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:36,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:36,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:36,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:36,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:36,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:22:36,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:36,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:36,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-21 11:22:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:36,135 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:36,135 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:36,135 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:36,135 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:36,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:36,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:36,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:36,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:36,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:36,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 11:22:36,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:36,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-09-21 11:22:36,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854522707] [2020-09-21 11:22:36,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:22:36,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-21 11:22:36,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467440089] [2020-09-21 11:22:36,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:22:36,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:22:36,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:22:36,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:22:36,151 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 13 states. [2020-09-21 11:22:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:22:36,904 INFO L93 Difference]: Finished difference Result 160 states and 205 transitions. [2020-09-21 11:22:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:22:36,904 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-09-21 11:22:36,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:22:36,906 INFO L225 Difference]: With dead ends: 160 [2020-09-21 11:22:36,906 INFO L226 Difference]: Without dead ends: 96 [2020-09-21 11:22:36,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:22:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-21 11:22:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-09-21 11:22:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-21 11:22:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-09-21 11:22:36,922 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 66 [2020-09-21 11:22:36,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:22:36,922 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-09-21 11:22:36,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:22:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-09-21 11:22:36,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 11:22:36,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:22:36,925 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:22:36,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:22:36,925 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:22:36,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:22:36,926 INFO L82 PathProgramCache]: Analyzing trace with hash -505239167, now seen corresponding path program 1 times [2020-09-21 11:22:36,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:22:36,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199234075] [2020-09-21 11:22:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:22:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:36,999 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:36,999 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,000 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,000 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-09-21 11:22:37,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-21 11:22:37,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:22:37,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:22:37,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-21 11:22:37,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:37,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:22:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:37,061 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:37,062 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,062 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,062 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:37,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:37,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:37,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:37,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:37,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:37,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 11:22:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:37,107 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:37,107 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,108 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,108 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:22:37,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:22:37,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:22:37,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:37,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:22:37,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:37,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 11:22:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:37,155 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:37,156 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,156 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,156 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:37,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:37,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:22:37,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:37,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:22:37,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:37,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 11:22:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:37,165 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:37,165 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,165 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,166 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:37,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:37,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:22:37,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:37,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:22:37,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:37,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 11:22:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:37,179 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:37,179 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,179 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,180 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:22:37,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:37,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:22:37,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:37,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 11:22:37,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:37,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:22:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:37,189 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:37,189 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,189 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,189 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:37,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:37,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:37,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:37,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:37,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:37,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 11:22:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:37,194 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:37,194 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,195 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,195 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:37,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:37,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:37,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:37,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:37,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:37,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 11:22:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:37,204 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:37,204 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,205 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,205 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:22:37,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:37,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:22:37,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:37,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:22:37,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:37,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 11:22:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:37,213 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:37,213 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,213 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,213 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:37,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:37,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:37,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:37,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:37,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:37,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 11:22:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:37,218 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:37,218 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,218 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,218 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:37,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:37,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:22:37,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:37,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:22:37,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:22:37,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-21 11:22:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:37,226 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:37,226 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,226 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,226 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:37,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:37,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:22:37,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:22:37,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:37,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-21 11:22:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:37,247 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:37,247 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,247 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,248 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:22:37,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:22:37,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:22:37,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:22:37,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:22:37,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:37,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 11:22:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:22:37,276 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:22:37,277 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:22:37,277 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:22:37,277 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:22:37,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:22:37,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:22:37,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:22:37,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:22:37,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:22:37,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 11:22:37,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:22:37,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:22:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-09-21 11:22:37,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199234075] [2020-09-21 11:22:37,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:22:37,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-21 11:22:37,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520191610] [2020-09-21 11:22:37,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:22:37,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:22:37,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:22:37,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:22:37,314 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 13 states. [2020-09-21 11:22:38,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:22:38,040 INFO L93 Difference]: Finished difference Result 148 states and 189 transitions. [2020-09-21 11:22:38,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:22:38,040 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-09-21 11:22:38,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:22:38,043 INFO L225 Difference]: With dead ends: 148 [2020-09-21 11:22:38,043 INFO L226 Difference]: Without dead ends: 96 [2020-09-21 11:22:38,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:22:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-21 11:22:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-09-21 11:22:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-21 11:22:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2020-09-21 11:22:38,059 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 79 [2020-09-21 11:22:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:22:38,059 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2020-09-21 11:22:38,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:22:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2020-09-21 11:22:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-21 11:22:38,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:22:38,062 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:22:38,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:22:38,062 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:22:38,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:22:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1062270604, now seen corresponding path program 1 times [2020-09-21 11:22:38,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:22:38,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366162379] [2020-09-21 11:22:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:22:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:22:38,117 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:22:38,117 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:22:38,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:22:38,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:22:38 BoogieIcfgContainer [2020-09-21 11:22:38,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:22:38,151 INFO L168 Benchmark]: Toolchain (without parser) took 7425.11 ms. Allocated memory was 148.4 MB in the beginning and 303.6 MB in the end (delta: 155.2 MB). Free memory was 103.0 MB in the beginning and 190.0 MB in the end (delta: -87.0 MB). Peak memory consumption was 68.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:22:38,152 INFO L168 Benchmark]: CDTParser took 0.78 ms. Allocated memory is still 148.4 MB. Free memory was 121.6 MB in the beginning and 121.2 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-21 11:22:38,153 INFO L168 Benchmark]: CACSL2BoogieTranslator took 558.56 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 102.5 MB in the beginning and 181.9 MB in the end (delta: -79.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:22:38,154 INFO L168 Benchmark]: Boogie Preprocessor took 60.81 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 179.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:22:38,155 INFO L168 Benchmark]: RCFGBuilder took 607.70 ms. Allocated memory is still 204.5 MB. Free memory was 178.7 MB in the beginning and 146.5 MB in the end (delta: 32.3 MB). Peak memory consumption was 32.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:22:38,156 INFO L168 Benchmark]: TraceAbstraction took 6188.53 ms. Allocated memory was 204.5 MB in the beginning and 303.6 MB in the end (delta: 99.1 MB). Free memory was 145.5 MB in the beginning and 190.0 MB in the end (delta: -44.4 MB). Peak memory consumption was 54.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:22:38,160 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.78 ms. Allocated memory is still 148.4 MB. Free memory was 121.6 MB in the beginning and 121.2 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 558.56 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 102.5 MB in the beginning and 181.9 MB in the end (delta: -79.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 60.81 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 179.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 607.70 ms. Allocated memory is still 204.5 MB. Free memory was 178.7 MB in the beginning and 146.5 MB in the end (delta: 32.3 MB). Peak memory consumption was 32.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6188.53 ms. Allocated memory was 204.5 MB in the beginning and 303.6 MB in the end (delta: 99.1 MB). Free memory was 145.5 MB in the beginning and 190.0 MB in the end (delta: -44.4 MB). Peak memory consumption was 54.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L96] CALL, EXPR nondet_tree() [L23] COND FALSE !(__VERIFIER_nondet_bool()) [L26] struct node *n = (struct node *)malloc(sizeof(struct node)); [L27] n->data = __VERIFIER_nondet_int() [L28] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; [L28] RET, EXPR nondet_tree() [L28] n->left = nondet_tree() [L29] CALL, EXPR nondet_tree() [L23] COND TRUE __VERIFIER_nondet_bool() [L24] return 0; [L29] RET, EXPR nondet_tree() [L29] n->right = nondet_tree() [L30] return n; [L96] RET, EXPR nondet_tree() [L96] CALL task(nondet_tree()) [L74] CALL, EXPR min(t) [L35] COND FALSE !(!n) [L38] EXPR n->left [L38] CALL, EXPR min(n->left) [L35] COND TRUE !n [L36] return 2147483647; [L38] RET, EXPR min(n->left) [L38] int a = min(n->left); [L39] EXPR n->right [L39] CALL, EXPR min(n->right) [L35] COND TRUE !n [L36] return 2147483647; [L39] RET, EXPR min(n->right) [L39] int b = min(n->right); [L40] COND TRUE a <= b [L40] return a; [L74] RET, EXPR min(t) [L74] int a = min(t); [L75] int b; [L77] CALL, EXPR size(t) [L69] COND FALSE !(!t) [L70] EXPR t->left [L70] CALL, EXPR size(t->left) [L69] COND TRUE !t [L69] return 0; [L70] RET, EXPR size(t->left) [L70] EXPR t->right [L70] CALL, EXPR size(t->right) [L69] COND TRUE !t [L69] return 0; [L70] RET, EXPR size(t->right) [L70] return size(t->left) + size(t->right) + 1; [L77] RET, EXPR size(t) [L77] int n = size(t); [L78] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L78] RET assume_abort_if_not(n != 0) [L79] EXPR, FCALL calloc(n, sizeof(int)) [L79] int *x = calloc(n, sizeof(int)); [L80] CALL tree_inorder(t, x, n) [L58] COND FALSE !(!t) [L61] EXPR t->left [L61] CALL, EXPR tree_inorder(t->left, a, i) [L58] COND TRUE !t [L59] return i; [L61] RET, EXPR tree_inorder(t->left, a, i) [L61] i = tree_inorder(t->left, a, i) [L62] EXPR i++ [L62] EXPR t->data [L62] a[i++] = t->data [L63] EXPR t->right [L63] CALL, EXPR tree_inorder(t->right, a, i) [L58] COND TRUE !t [L59] return i; [L63] RET, EXPR tree_inorder(t->right, a, i) [L63] i = tree_inorder(t->right, a, i) [L64] return i; [L80] RET tree_inorder(t, x, n) [L81] EXPR x[0] [L81] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.0s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 428 SDtfs, 665 SDslu, 1422 SDs, 0 SdLazy, 1860 SolverSat, 705 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 284 ConstructedInterpolants, 0 QuantifiedInterpolants, 51473 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 64/66 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...