/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 --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 05:00:44,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 05:00:44,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 05:00:44,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 05:00:44,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 05:00:44,497 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 05:00:44,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 05:00:44,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 05:00:44,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 05:00:44,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 05:00:44,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 05:00:44,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 05:00:44,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 05:00:44,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 05:00:44,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 05:00:44,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 05:00:44,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 05:00:44,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 05:00:44,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 05:00:44,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 05:00:44,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 05:00:44,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 05:00:44,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 05:00:44,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 05:00:44,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 05:00:44,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 05:00:44,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 05:00:44,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 05:00:44,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 05:00:44,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 05:00:44,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 05:00:44,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 05:00:44,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 05:00:44,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 05:00:44,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 05:00:44,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 05:00:44,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 05:00:44,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 05:00:44,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 05:00:44,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 05:00:44,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 05:00:44,555 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 05:00:44,595 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 05:00:44,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 05:00:44,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 05:00:44,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 05:00:44,598 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 05:00:44,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 05:00:44,598 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 05:00:44,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 05:00:44,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 05:00:44,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 05:00:44,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 05:00:44,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 05:00:44,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 05:00:44,601 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 05:00:44,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 05:00:44,601 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 05:00:44,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 05:00:44,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 05:00:44,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 05:00:44,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 05:00:44,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 05:00:44,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 05:00:44,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 05:00:44,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 05:00:44,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 05:00:44,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 05:00:44,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 05:00:44,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 05:00:44,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 05:00:44,604 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.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 05:00:44,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 05:00:44,933 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 05:00:44,937 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 05:00:44,939 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 05:00:44,939 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 05:00:44,940 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-10-15 05:00:44,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fceb8d52e/73207208424e4f53b5c7cc5f0792febb/FLAGbf9316deb [2020-10-15 05:00:45,391 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 05:00:45,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-10-15 05:00:45,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fceb8d52e/73207208424e4f53b5c7cc5f0792febb/FLAGbf9316deb [2020-10-15 05:00:45,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fceb8d52e/73207208424e4f53b5c7cc5f0792febb [2020-10-15 05:00:45,825 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 05:00:45,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 05:00:45,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 05:00:45,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 05:00:45,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 05:00:45,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:00:45" (1/1) ... [2020-10-15 05:00:45,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5319fc4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:00:45, skipping insertion in model container [2020-10-15 05:00:45,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:00:45" (1/1) ... [2020-10-15 05:00:45,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 05:00:45,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 05:00:46,052 WARN L1484 CHandler]: Possible shadowing of function min [2020-10-15 05:00:46,054 WARN L1484 CHandler]: Possible shadowing of function min [2020-10-15 05:00:46,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 05:00:46,084 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 05:00:46,190 WARN L1484 CHandler]: Possible shadowing of function min [2020-10-15 05:00:46,192 WARN L1484 CHandler]: Possible shadowing of function min [2020-10-15 05:00:46,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 05:00:46,222 INFO L208 MainTranslator]: Completed translation [2020-10-15 05:00:46,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:00:46 WrapperNode [2020-10-15 05:00:46,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 05:00:46,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 05:00:46,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 05:00:46,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 05:00:46,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:00:46" (1/1) ... [2020-10-15 05:00:46,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:00:46" (1/1) ... [2020-10-15 05:00:46,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:00:46" (1/1) ... [2020-10-15 05:00:46,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:00:46" (1/1) ... [2020-10-15 05:00:46,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:00:46" (1/1) ... [2020-10-15 05:00:46,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:00:46" (1/1) ... [2020-10-15 05:00:46,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:00:46" (1/1) ... [2020-10-15 05:00:46,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 05:00:46,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 05:00:46,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 05:00:46,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 05:00:46,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:00:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 05:00:46,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 05:00:46,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 05:00:46,425 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-10-15 05:00:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 05:00:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-15 05:00:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-15 05:00:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-15 05:00:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-15 05:00:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-15 05:00:46,427 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-15 05:00:46,427 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 05:00:46,429 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-15 05:00:46,430 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-15 05:00:46,430 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-15 05:00:46,430 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-15 05:00:46,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-15 05:00:46,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-15 05:00:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-10-15 05:00:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 05:00:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 05:00:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-15 05:00:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-15 05:00:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 05:00:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-15 05:00:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-15 05:00:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-15 05:00:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-15 05:00:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-15 05:00:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 05:00:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-15 05:00:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-15 05:00:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-15 05:00:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 05:00:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-15 05:00:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 05:00:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 05:00:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 05:00:47,016 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 05:00:47,016 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-15 05:00:47,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:00:47 BoogieIcfgContainer [2020-10-15 05:00:47,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 05:00:47,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 05:00:47,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 05:00:47,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 05:00:47,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:00:45" (1/3) ... [2020-10-15 05:00:47,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1985660e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:00:47, skipping insertion in model container [2020-10-15 05:00:47,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:00:46" (2/3) ... [2020-10-15 05:00:47,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1985660e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:00:47, skipping insertion in model container [2020-10-15 05:00:47,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:00:47" (3/3) ... [2020-10-15 05:00:47,037 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2020-10-15 05:00:47,046 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 05:00:47,053 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 05:00:47,067 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 05:00:47,092 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 05:00:47,092 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 05:00:47,092 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 05:00:47,092 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 05:00:47,093 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 05:00:47,093 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 05:00:47,093 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 05:00:47,093 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 05:00:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states. [2020-10-15 05:00:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 05:00:47,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 05:00:47,123 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] [2020-10-15 05:00:47,124 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 05:00:47,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 05:00:47,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1057238675, now seen corresponding path program 1 times [2020-10-15 05:00:47,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 05:00:47,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637809471] [2020-10-15 05:00:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 05:00:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:47,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:47,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:47,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 05:00:47,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:47,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-15 05:00:47,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:47,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:47,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 05:00:47,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-15 05:00:47,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 05:00:47,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 05:00:47,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 05:00:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:47,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:47,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:47,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 05:00:47,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:47,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 05:00:47,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:47,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:47,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:00:47,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:47,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:00:47,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:47,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-15 05:00:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:47,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:47,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:47,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 05:00:47,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:47,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 05:00:47,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:47,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:47,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:00:47,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:47,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:00:47,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:47,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-15 05:00:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:47,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:47,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:47,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:47,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:47,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 05:00:47,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:47,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:47,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:00:47,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:47,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:00:47,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:47,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-15 05:00:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:47,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:47,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:47,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:47,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:47,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 05:00:47,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:47,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:47,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 05:00:47,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:47,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 05:00:47,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:47,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-15 05:00:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:47,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:48,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:48,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:48,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:48,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 05:00:48,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:48,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:48,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 05:00:48,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 05:00:48,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 05:00:48,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:48,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-15 05:00:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:48,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:48,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:48,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 05:00:48,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:48,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 05:00:48,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:48,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:48,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:00:48,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 05:00:48,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:00:48,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:48,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-15 05:00:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:48,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:48,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:48,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:48,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:48,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 05:00:48,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:48,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:48,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:00:48,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-15 05:00:48,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:00:48,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 05:00:48,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637809471] [2020-10-15 05:00:48,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 05:00:48,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-15 05:00:48,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450073107] [2020-10-15 05:00:48,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 05:00:48,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 05:00:48,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 05:00:48,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-15 05:00:48,124 INFO L87 Difference]: Start difference. First operand 97 states. Second operand 11 states. [2020-10-15 05:00:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 05:00:48,849 INFO L93 Difference]: Finished difference Result 171 states and 229 transitions. [2020-10-15 05:00:48,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 05:00:48,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-15 05:00:48,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 05:00:48,880 INFO L225 Difference]: With dead ends: 171 [2020-10-15 05:00:48,880 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 05:00:48,885 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 [2020-10-15 05:00:48,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 05:00:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-10-15 05:00:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-15 05:00:48,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2020-10-15 05:00:48,953 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 44 [2020-10-15 05:00:48,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 05:00:48,953 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2020-10-15 05:00:48,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 05:00:48,954 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2020-10-15 05:00:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 05:00:48,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 05:00:48,958 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] [2020-10-15 05:00:48,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 05:00:48,959 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 05:00:48,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 05:00:48,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1861604494, now seen corresponding path program 1 times [2020-10-15 05:00:48,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 05:00:48,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14152125] [2020-10-15 05:00:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 05:00:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:48,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:49,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:49,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:51,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:51,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-15 05:00:51,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 05:00:51,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2707 [2020-10-15 05:00:51,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:51,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 05:00:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-15 05:00:51,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-15 05:00:51,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:51,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 05:00:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:51,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:51,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:51,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 05:00:51,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:51,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 05:00:51,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:51,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:51,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:00:51,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:51,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:00:51,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:51,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-15 05:00:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:51,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:51,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:51,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 05:00:51,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:51,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 05:00:51,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:51,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:51,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:00:51,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:51,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:00:51,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:51,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-15 05:00:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:51,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:51,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:51,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:51,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:51,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 05:00:51,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:51,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:51,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:00:51,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:51,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:00:51,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:51,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-15 05:00:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:51,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:51,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:51,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-15 05:00:51,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:51,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-15 05:00:51,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:51,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:51,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 05:00:51,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:51,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 05:00:51,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:51,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 05:00:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:51,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:51,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:51,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:51,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:51,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 05:00:51,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:51,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:00:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:51,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 05:00:51,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:51,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-15 05:00:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:51,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:51,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:51,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:51,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:51,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 05:00:51,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:51,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:51,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:00:51,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:51,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 05:00:51,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:51,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-15 05:00:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:51,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:51,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:51,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:51,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:51,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 05:00:51,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:51,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:00:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:51,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 05:00:51,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:51,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-15 05:00:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:51,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:51,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:51,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 05:00:51,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:51,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 05:00:51,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:51,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:00:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:51,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 05:00:51,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:51,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-15 05:00:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:51,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:51,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:51,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:51,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:51,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 05:00:51,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:51,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:51,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 05:00:51,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 05:00:51,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 05:00:51,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 05:00:51,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14152125] [2020-10-15 05:00:51,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 05:00:51,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 05:00:51,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325994763] [2020-10-15 05:00:51,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 05:00:51,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 05:00:51,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 05:00:51,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-15 05:00:51,974 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand 11 states. [2020-10-15 05:00:52,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 05:00:52,644 INFO L93 Difference]: Finished difference Result 152 states and 194 transitions. [2020-10-15 05:00:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 05:00:52,645 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-15 05:00:52,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 05:00:52,648 INFO L225 Difference]: With dead ends: 152 [2020-10-15 05:00:52,648 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 05:00:52,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-15 05:00:52,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 05:00:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-10-15 05:00:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 05:00:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 121 transitions. [2020-10-15 05:00:52,670 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 121 transitions. Word has length 56 [2020-10-15 05:00:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 05:00:52,671 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 121 transitions. [2020-10-15 05:00:52,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 05:00:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 121 transitions. [2020-10-15 05:00:52,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 05:00:52,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 05:00:52,674 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-15 05:00:52,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 05:00:52,675 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 05:00:52,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 05:00:52,676 INFO L82 PathProgramCache]: Analyzing trace with hash -283306239, now seen corresponding path program 1 times [2020-10-15 05:00:52,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 05:00:52,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089186232] [2020-10-15 05:00:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 05:00:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:52,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:52,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:52,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:53,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:55,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:55,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-15 05:00:55,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 05:00:55,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2580 [2020-10-15 05:00:55,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:55,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:55,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 05:00:55,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-15 05:00:55,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-15 05:00:55,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:55,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 05:00:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:55,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:55,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:55,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 05:00:55,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:55,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 05:00:55,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:55,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:00:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:55,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:00:55,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:55,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-15 05:00:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:55,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:55,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:55,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 05:00:55,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:55,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 05:00:55,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:55,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:55,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:00:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:00:55,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:55,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-15 05:00:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:55,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:55,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:55,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:55,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:55,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 05:00:55,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:55,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:55,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 05:00:55,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:55,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-15 05:00:55,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:55,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-15 05:00:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:55,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:55,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:55,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:55,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-15 05:00:55,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 05:00:55,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-15 05:00:55,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:55,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:55,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:00:55,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:55,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 05:00:55,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:55,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 05:00:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:55,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:55,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:55,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:55,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:55,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 05:00:55,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:55,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:00:55,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:55,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:00:55,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:55,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-15 05:00:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:55,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:55,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:55,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:55,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:55,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 05:00:55,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:55,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:55,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:00:55,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:55,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:00:55,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:55,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-15 05:00:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:55,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:55,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:55,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:55,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:55,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 05:00:55,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:55,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:55,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:00:55,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:55,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 05:00:55,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:55,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-15 05:00:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:55,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:55,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:55,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 05:00:55,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:55,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 05:00:55,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:55,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:00:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 05:00:55,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:55,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-15 05:00:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:55,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:55,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:55,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-15 05:00:55,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:55,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-15 05:00:55,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:55,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:55,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 05:00:55,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 05:00:55,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 05:00:55,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:55,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 05:00:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:55,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:55,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:55,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:55,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:55,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 05:00:55,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:55,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:55,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:00:55,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:55,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 05:00:55,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:55,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-15 05:00:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:55,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:55,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:55,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:00:55,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:00:55,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 05:00:55,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:55,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:55,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:00:55,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:00:55,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 05:00:55,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-15 05:00:55,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089186232] [2020-10-15 05:00:55,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 05:00:55,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 05:00:55,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460063100] [2020-10-15 05:00:55,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 05:00:55,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 05:00:55,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 05:00:55,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-15 05:00:55,617 INFO L87 Difference]: Start difference. First operand 96 states and 121 transitions. Second operand 11 states. [2020-10-15 05:00:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 05:00:56,356 INFO L93 Difference]: Finished difference Result 168 states and 215 transitions. [2020-10-15 05:00:56,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 05:00:56,357 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-15 05:00:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 05:00:56,359 INFO L225 Difference]: With dead ends: 168 [2020-10-15 05:00:56,359 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 05:00:56,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-15 05:00:56,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 05:00:56,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2020-10-15 05:00:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 05:00:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2020-10-15 05:00:56,375 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 68 [2020-10-15 05:00:56,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 05:00:56,376 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2020-10-15 05:00:56,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 05:00:56,376 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2020-10-15 05:00:56,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-15 05:00:56,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 05:00:56,379 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-15 05:00:56,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 05:00:56,380 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 05:00:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 05:00:56,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2028374671, now seen corresponding path program 1 times [2020-10-15 05:00:56,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 05:00:56,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651246351] [2020-10-15 05:00:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 05:00:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:56,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:56,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:56,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:00:59,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:00:59,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-15 05:00:59,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 05:00:59,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3538 [2020-10-15 05:00:59,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:00:59,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:00:59,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 05:00:59,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 05:00:59,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-15 05:00:59,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:00:59,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 05:00:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:00:59,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:01:00,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 05:01:00,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:01:00,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 05:01:00,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:01:00,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:01:00,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:01:00,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:01:00,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:01:00,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:01:00,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-15 05:01:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:01:00,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:01:00,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 05:01:00,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:01:00,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 05:01:00,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:01:00,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:01:00,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 05:01:00,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:01:00,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-15 05:01:00,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 05:01:00,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-15 05:01:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:01:00,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:01:00,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-15 05:01:00,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 05:01:00,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-15 05:01:00,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:01:00,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:01:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:01:00,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:01:00,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 05:01:00,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 05:01:00,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 05:01:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:01:00,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:01:00,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:01:00,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:01:00,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 05:01:00,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:01:00,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:01:00,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:01:00,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:01:00,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:01:00,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:01:00,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-15 05:01:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:01:00,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:01:00,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:01:00,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:01:00,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 05:01:00,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:01:00,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:01:00,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:01:00,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:01:00,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:01:00,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:01:00,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-15 05:01:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:01:00,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:01:00,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-15 05:01:00,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 05:01:00,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-15 05:01:00,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:01:00,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:01:00,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:01:00,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:01:00,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 05:01:00,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:01:00,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 05:01:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:01:00,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:01:00,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:01:00,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:01:00,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 05:01:00,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:01:00,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:01:00,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:01:00,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:01:00,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:01:00,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:01:00,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-15 05:01:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:01:00,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:01:00,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:01:00,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:01:00,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 05:01:00,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:01:00,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:01:00,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 05:01:00,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:01:00,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 05:01:00,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:01:00,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-15 05:01:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:01:00,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:01:00,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:01:00,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:01:00,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 05:01:00,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:01:00,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:01:00,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:01:00,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:01:00,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 05:01:00,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:01:00,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-15 05:01:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:01:00,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:01:00,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 05:01:00,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:01:00,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 05:01:00,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:01:00,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:01:00,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:01:00,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:01:00,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 05:01:00,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:01:00,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-15 05:01:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:01:00,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:01:00,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-15 05:01:00,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:01:00,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-15 05:01:00,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:01:00,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:01:00,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 05:01:00,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-15 05:01:00,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 05:01:00,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:01:00,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 05:01:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:01:00,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:01:00,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:01:00,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:01:00,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 05:01:00,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:01:00,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:01:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:01:00,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:01:00,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 05:01:00,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 05:01:00,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-15 05:01:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 05:01:00,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 05:01:00,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 05:01:00,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 05:01:00,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 05:01:00,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 05:01:00,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 05:01:00,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 05:01:00,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 05:01:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 05:01:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 05:01:00,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 05:01:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-15 05:01:00,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651246351] [2020-10-15 05:01:00,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 05:01:00,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 05:01:00,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253215393] [2020-10-15 05:01:00,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 05:01:00,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 05:01:00,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 05:01:00,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-15 05:01:00,300 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand 12 states. [2020-10-15 05:01:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 05:01:01,087 INFO L93 Difference]: Finished difference Result 170 states and 217 transitions. [2020-10-15 05:01:01,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 05:01:01,087 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-10-15 05:01:01,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 05:01:01,092 INFO L225 Difference]: With dead ends: 170 [2020-10-15 05:01:01,092 INFO L226 Difference]: Without dead ends: 101 [2020-10-15 05:01:01,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-10-15 05:01:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-15 05:01:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-15 05:01:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 05:01:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2020-10-15 05:01:01,119 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 81 [2020-10-15 05:01:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 05:01:01,119 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2020-10-15 05:01:01,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 05:01:01,119 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2020-10-15 05:01:01,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-15 05:01:01,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 05:01:01,125 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] [2020-10-15 05:01:01,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 05:01:01,125 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 05:01:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 05:01:01,125 INFO L82 PathProgramCache]: Analyzing trace with hash -299285422, now seen corresponding path program 1 times [2020-10-15 05:01:01,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 05:01:01,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504201155] [2020-10-15 05:01:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 05:01:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 05:01:01,162 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-15 05:01:01,162 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 05:01:01,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 05:01:01,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 05:01:01 BoogieIcfgContainer [2020-10-15 05:01:01,195 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 05:01:01,200 INFO L168 Benchmark]: Toolchain (without parser) took 15370.47 ms. Allocated memory was 146.3 MB in the beginning and 428.3 MB in the end (delta: 282.1 MB). Free memory was 100.3 MB in the beginning and 349.3 MB in the end (delta: -249.0 MB). Peak memory consumption was 33.0 MB. Max. memory is 7.1 GB. [2020-10-15 05:01:01,203 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 146.3 MB. Free memory was 119.6 MB in the beginning and 119.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-15 05:01:01,212 INFO L168 Benchmark]: CACSL2BoogieTranslator took 390.90 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 100.3 MB in the beginning and 177.9 MB in the end (delta: -77.6 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-10-15 05:01:01,212 INFO L168 Benchmark]: Boogie Preprocessor took 104.60 ms. Allocated memory is still 202.4 MB. Free memory was 177.9 MB in the beginning and 176.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-15 05:01:01,216 INFO L168 Benchmark]: RCFGBuilder took 695.89 ms. Allocated memory is still 202.4 MB. Free memory was 176.0 MB in the beginning and 141.6 MB in the end (delta: 34.4 MB). Peak memory consumption was 34.4 MB. Max. memory is 7.1 GB. [2020-10-15 05:01:01,217 INFO L168 Benchmark]: TraceAbstraction took 14167.34 ms. Allocated memory was 202.4 MB in the beginning and 428.3 MB in the end (delta: 226.0 MB). Free memory was 140.7 MB in the beginning and 349.3 MB in the end (delta: -208.6 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-10-15 05:01:01,224 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 146.3 MB. Free memory was 119.6 MB in the beginning and 119.1 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 390.90 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 100.3 MB in the beginning and 177.9 MB in the end (delta: -77.6 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.60 ms. Allocated memory is still 202.4 MB. Free memory was 177.9 MB in the beginning and 176.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 695.89 ms. Allocated memory is still 202.4 MB. Free memory was 176.0 MB in the beginning and 141.6 MB in the end (delta: 34.4 MB). Peak memory consumption was 34.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14167.34 ms. Allocated memory was 202.4 MB in the beginning and 428.3 MB in the end (delta: 226.0 MB). Free memory was 140.7 MB in the beginning and 349.3 MB in the end (delta: -208.6 MB). Peak memory consumption was 17.3 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: [L100] 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; [L100] RET, EXPR nondet_tree() [L100] CALL task(nondet_tree()) [L76] CALL, EXPR min(t) [L35] COND FALSE !(!n) [L38] EXPR n->data [L38] int a = n->data; [L39] EXPR n->left [L39] CALL, EXPR min(n->left) [L35] COND TRUE !n [L36] return 2147483647; [L39] RET, EXPR min(n->left) [L39] int b = min(n->left); [L40] EXPR n->right [L40] CALL, EXPR min(n->right) [L35] COND TRUE !n [L36] return 2147483647; [L40] RET, EXPR min(n->right) [L40] int c = min(n->right); [L41] COND TRUE b <= a && b <= c [L41] return b; [L76] RET, EXPR min(t) [L76] int a = min(t); [L77] int b; [L79] CALL, EXPR size(t) [L71] COND FALSE !(!t) [L72] EXPR t->left [L72] CALL, EXPR size(t->left) [L71] COND TRUE !t [L71] return 0; [L72] RET, EXPR size(t->left) [L72] EXPR t->right [L72] CALL, EXPR size(t->right) [L71] COND TRUE !t [L71] return 0; [L72] RET, EXPR size(t->right) [L72] return size(t->left) + size(t->right) + 1; [L79] RET, EXPR size(t) [L79] int n = size(t); [L80] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) [L80] RET assume_cycle_if_not(n != 0) [L81] EXPR, FCALL calloc(n, sizeof(int)) [L81] int *x = calloc(n, sizeof(int)); [L82] CALL tree_inorder(t, x, n) [L60] COND FALSE !(!t) [L63] EXPR t->left [L63] CALL, EXPR tree_inorder(t->left, a, i) [L60] COND TRUE !t [L61] return i; [L63] RET, EXPR tree_inorder(t->left, a, i) [L63] i = tree_inorder(t->left, a, i) [L64] EXPR i++ [L64] EXPR t->data [L64] a[i++] = t->data [L65] EXPR t->right [L65] CALL, EXPR tree_inorder(t->right, a, i) [L60] COND TRUE !t [L61] return i; [L65] RET, EXPR tree_inorder(t->right, a, i) [L65] i = tree_inorder(t->right, a, i) [L66] return i; [L82] RET tree_inorder(t, x, n) [L83] EXPR x[0] [L83] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 97 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.0s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 348 SDtfs, 510 SDslu, 1235 SDs, 0 SdLazy, 1703 SolverSat, 528 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 141 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=4, 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, 4 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 10.5s InterpolantComputationTime, 340 NumberOfCodeBlocks, 340 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 245 ConstructedInterpolants, 0 QuantifiedInterpolants, 64491 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 66/72 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...