/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 SingleStatement --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:44:15,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:44:16,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:44:16,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:44:16,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:44:16,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:44:16,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:44:16,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:44:16,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:44:16,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:44:16,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:44:16,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:44:16,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:44:16,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:44:16,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:44:16,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:44:16,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:44:16,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:44:16,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:44:16,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:44:16,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:44:16,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:44:16,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:44:16,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:44:16,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:44:16,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:44:16,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:44:16,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:44:16,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:44:16,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:44:16,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:44:16,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:44:16,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:44:16,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:44:16,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:44:16,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:44:16,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:44:16,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:44:16,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:44:16,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:44:16,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:44:16,103 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 20:44:16,152 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:44:16,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:44:16,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:44:16,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:44:16,154 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:44:16,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:44:16,155 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:44:16,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:44:16,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:44:16,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:44:16,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:44:16,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:44:16,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:44:16,156 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:44:16,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:44:16,157 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:44:16,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:44:16,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:44:16,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:44:16,157 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:44:16,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:44:16,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:44:16,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:44:16,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:44:16,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:44:16,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:44:16,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:44:16,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:44:16,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:44:16,159 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 -> SingleStatement 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=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:44:16,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:44:16,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:44:16,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:44:16,720 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:44:16,722 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:44:16,723 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-09-24 20:44:16,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee453b6e1/1a1bbf005da048fb87237dd95b2ecfb8/FLAGc77a1cf9c [2020-09-24 20:44:17,420 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:44:17,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-09-24 20:44:17,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee453b6e1/1a1bbf005da048fb87237dd95b2ecfb8/FLAGc77a1cf9c [2020-09-24 20:44:17,714 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee453b6e1/1a1bbf005da048fb87237dd95b2ecfb8 [2020-09-24 20:44:17,727 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:44:17,734 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:44:17,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:44:17,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:44:17,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:44:17,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:44:17" (1/1) ... [2020-09-24 20:44:17,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc54d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:17, skipping insertion in model container [2020-09-24 20:44:17,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:44:17" (1/1) ... [2020-09-24 20:44:17,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:44:17,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:44:18,043 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-24 20:44:18,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:44:18,098 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:44:18,210 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-24 20:44:18,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:44:18,264 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:44:18,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:18 WrapperNode [2020-09-24 20:44:18,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:44:18,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:44:18,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:44:18,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:44:18,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:18" (1/1) ... [2020-09-24 20:44:18,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:18" (1/1) ... [2020-09-24 20:44:18,297 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:18" (1/1) ... [2020-09-24 20:44:18,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:18" (1/1) ... [2020-09-24 20:44:18,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:18" (1/1) ... [2020-09-24 20:44:18,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:18" (1/1) ... [2020-09-24 20:44:18,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:18" (1/1) ... [2020-09-24 20:44:18,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:44:18,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:44:18,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:44:18,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:44:18,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:44:18,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:44:18,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:44:18,423 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-09-24 20:44:18,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:44:18,424 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-09-24 20:44:18,424 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-09-24 20:44:18,425 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-09-24 20:44:18,425 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-09-24 20:44:18,425 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-09-24 20:44:18,425 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-09-24 20:44:18,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:44:18,426 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-24 20:44:18,426 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 20:44:18,427 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 20:44:18,427 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 20:44:18,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 20:44:18,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 20:44:18,429 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-09-24 20:44:18,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:44:18,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:44:18,429 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-09-24 20:44:18,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 20:44:18,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 20:44:18,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 20:44:18,432 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-09-24 20:44:18,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 20:44:18,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 20:44:18,433 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-09-24 20:44:18,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:44:18,433 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-09-24 20:44:18,433 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-09-24 20:44:18,433 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-09-24 20:44:18,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 20:44:18,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-24 20:44:18,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:44:18,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:44:18,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:44:19,151 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:44:19,151 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-24 20:44:19,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:44:19 BoogieIcfgContainer [2020-09-24 20:44:19,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:44:19,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:44:19,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:44:19,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:44:19,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:44:17" (1/3) ... [2020-09-24 20:44:19,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8a574f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:44:19, skipping insertion in model container [2020-09-24 20:44:19,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:18" (2/3) ... [2020-09-24 20:44:19,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8a574f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:44:19, skipping insertion in model container [2020-09-24 20:44:19,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:44:19" (3/3) ... [2020-09-24 20:44:19,169 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2020-09-24 20:44:19,180 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:44:19,191 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:44:19,209 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:44:19,238 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:44:19,238 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:44:19,238 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:44:19,239 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:44:19,239 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:44:19,239 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:44:19,239 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:44:19,239 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:44:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states. [2020-09-24 20:44:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 20:44:19,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:44:19,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:44:19,281 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:44:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:44:19,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1657225032, now seen corresponding path program 1 times [2020-09-24 20:44:19,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:44:19,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323362406] [2020-09-24 20:44:19,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:44:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:19,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:20,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:20,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-24 20:44:20,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:20,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-09-24 20:44:20,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:20,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:44:20,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-24 20:44:20,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 20:44:20,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 20:44:20,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:44:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:20,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:20,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:20,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:20,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:20,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 20:44:20,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:20,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:20,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:20,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:20,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:44:20,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 20:44:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:20,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:20,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:20,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:20,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:20,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 20:44:20,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:20,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:20,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:20,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:20,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 20:44:20,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 20:44:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:20,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:20,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:20,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:20,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:20,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:44:20,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:20,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:20,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:20,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:20,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 20:44:20,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 20:44:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:20,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:20,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:20,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:20,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:20,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 20:44:20,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:44:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:44:20,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:44:20,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 20:44:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:20,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:20,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:20,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:44:20,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:20,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 20:44:20,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:20,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:44:20,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 20:44:20,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:44:20,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-24 20:44:20,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-24 20:44:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:20,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:20,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 20:44:20,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:20,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:44:20,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:20,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:20,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-24 20:44:20,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:20,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:20,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 20:44:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:20,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:20,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:20,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 20:44:20,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:20,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:44:20,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:20,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:20,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 20:44:20,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:20,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:44:20,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323362406] [2020-09-24 20:44:20,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:44:20,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 20:44:20,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218677221] [2020-09-24 20:44:20,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:44:20,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:44:20,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:44:20,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:44:20,630 INFO L87 Difference]: Start difference. First operand 206 states. Second operand 11 states. [2020-09-24 20:44:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:44:21,980 INFO L93 Difference]: Finished difference Result 366 states and 427 transitions. [2020-09-24 20:44:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:44:21,983 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-24 20:44:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:44:22,004 INFO L225 Difference]: With dead ends: 366 [2020-09-24 20:44:22,004 INFO L226 Difference]: Without dead ends: 210 [2020-09-24 20:44:22,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-24 20:44:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-24 20:44:22,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 196. [2020-09-24 20:44:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-09-24 20:44:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 220 transitions. [2020-09-24 20:44:22,115 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 220 transitions. Word has length 60 [2020-09-24 20:44:22,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:44:22,116 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 220 transitions. [2020-09-24 20:44:22,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:44:22,116 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 220 transitions. [2020-09-24 20:44:22,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-24 20:44:22,133 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:44:22,133 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:44:22,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:44:22,134 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:44:22,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:44:22,134 INFO L82 PathProgramCache]: Analyzing trace with hash -290171790, now seen corresponding path program 1 times [2020-09-24 20:44:22,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:44:22,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446145441] [2020-09-24 20:44:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:44:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:22,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:22,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:22,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:26,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:26,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-09-24 20:44:26,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:44:26,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4521 [2020-09-24 20:44:26,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:26,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 20:44:26,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:44:26,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 20:44:26,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:44:26,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:44:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:26,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:26,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:26,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:26,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:26,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:44:26,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:26,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:26,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:26,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:26,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:26,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 20:44:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:26,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:26,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:26,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:26,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:26,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 20:44:26,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:26,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:44:26,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:26,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:44:26,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:26,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 20:44:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:26,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:26,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:26,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:26,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:26,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:44:26,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 20:44:26,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:26,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:44:26,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:26,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 20:44:26,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:44:26,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 20:44:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:26,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:27,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:27,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 20:44:27,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:27,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-24 20:44:27,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:27,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:44:27,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 20:44:27,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 20:44:27,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:27,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 20:44:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:27,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:27,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:27,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:27,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:27,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:44:27,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:27,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:44:27,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:27,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 20:44:27,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:27,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:44:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:27,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:27,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:27,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:27,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:27,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:44:27,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:27,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:44:27,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:27,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 20:44:27,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:27,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-24 20:44:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:27,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:27,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:27,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:44:27,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:27,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:44:27,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 20:44:27,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:27,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:27,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 20:44:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:27,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:27,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:27,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 20:44:27,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:27,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 20:44:27,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:27,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:27,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-24 20:44:27,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:27,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:27,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 20:44:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:27,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:27,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:27,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 20:44:27,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:27,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:44:27,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:27,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:27,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 20:44:27,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:27,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:44:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 20:44:27,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446145441] [2020-09-24 20:44:27,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:44:27,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 20:44:27,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392514453] [2020-09-24 20:44:27,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 20:44:27,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:44:27,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 20:44:27,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:44:27,211 INFO L87 Difference]: Start difference. First operand 196 states and 220 transitions. Second operand 14 states. [2020-09-24 20:44:29,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:44:29,382 INFO L93 Difference]: Finished difference Result 393 states and 449 transitions. [2020-09-24 20:44:29,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 20:44:29,383 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-09-24 20:44:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:44:29,388 INFO L225 Difference]: With dead ends: 393 [2020-09-24 20:44:29,388 INFO L226 Difference]: Without dead ends: 211 [2020-09-24 20:44:29,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-09-24 20:44:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-24 20:44:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 200. [2020-09-24 20:44:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-24 20:44:29,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 226 transitions. [2020-09-24 20:44:29,418 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 226 transitions. Word has length 80 [2020-09-24 20:44:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:44:29,419 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 226 transitions. [2020-09-24 20:44:29,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 20:44:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 226 transitions. [2020-09-24 20:44:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-24 20:44:29,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:44:29,422 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:44:29,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:44:29,423 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:44:29,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:44:29,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1397703292, now seen corresponding path program 1 times [2020-09-24 20:44:29,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:44:29,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945675881] [2020-09-24 20:44:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:44:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:29,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:29,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:29,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:34,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:34,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-24 20:44:34,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:44:34,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-24 20:44:34,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 20:44:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 20:44:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-09-24 20:44:34,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:34,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:44:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:34,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:34,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:34,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:34,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:34,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 20:44:34,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:34,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:34,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:34,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:34,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:34,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 20:44:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:34,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:34,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:34,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 20:44:34,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:34,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-09-24 20:44:34,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:34,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:44:34,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:34,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 20:44:34,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:44:34,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 20:44:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:34,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:34,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:34,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:34,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:34,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 20:44:34,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:34,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:44:34,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:34,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 20:44:34,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:34,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 20:44:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:34,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:34,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:34,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:34,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:34,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 20:44:34,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:34,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:44:34,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:34,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 20:44:34,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:44:34,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 20:44:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:34,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:34,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:34,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 20:44:34,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:34,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 20:44:34,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:34,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:44:34,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:34,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 20:44:34,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:34,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 20:44:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:34,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:34,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:34,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:34,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:34,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:44:34,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:34,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:34,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:34,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:34,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:34,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-24 20:44:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:34,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:34,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:34,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:34,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:34,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:44:34,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:34,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:34,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:34,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:34,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:34,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-24 20:44:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:34,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:34,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:34,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 20:44:34,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:34,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 20:44:34,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:34,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:44:34,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:34,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 20:44:34,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:34,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 20:44:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:34,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:34,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:34,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:34,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:34,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:44:34,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:34,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:34,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:34,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:34,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:44:34,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 20:44:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:34,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:34,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:34,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:44:34,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:34,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:44:34,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:34,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:44:34,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-24 20:44:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:34,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:34,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:34,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 20:44:34,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:34,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 20:44:34,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:34,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:44:34,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:34,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 20:44:34,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:35,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 20:44:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:35,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:35,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:35,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 20:44:35,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:35,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 20:44:35,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:35,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 20:44:35,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:35,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 20:44:35,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:35,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-24 20:44:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:35,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:35,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:35,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 20:44:35,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:35,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 20:44:35,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:35,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:44:35,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 20:44:35,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 20:44:35,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 20:44:35,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945675881] [2020-09-24 20:44:35,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:44:35,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-24 20:44:35,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190765470] [2020-09-24 20:44:35,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 20:44:35,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:44:35,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 20:44:35,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:44:35,157 INFO L87 Difference]: Start difference. First operand 200 states and 226 transitions. Second operand 14 states. [2020-09-24 20:44:36,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:44:36,568 INFO L93 Difference]: Finished difference Result 336 states and 378 transitions. [2020-09-24 20:44:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 20:44:36,568 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 127 [2020-09-24 20:44:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:44:36,575 INFO L225 Difference]: With dead ends: 336 [2020-09-24 20:44:36,575 INFO L226 Difference]: Without dead ends: 211 [2020-09-24 20:44:36,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-09-24 20:44:36,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-24 20:44:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2020-09-24 20:44:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-09-24 20:44:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 230 transitions. [2020-09-24 20:44:36,604 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 230 transitions. Word has length 127 [2020-09-24 20:44:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:44:36,605 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 230 transitions. [2020-09-24 20:44:36,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 20:44:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 230 transitions. [2020-09-24 20:44:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-24 20:44:36,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:44:36,608 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:44:36,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:44:36,608 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:44:36,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:44:36,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1130815571, now seen corresponding path program 1 times [2020-09-24 20:44:36,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:44:36,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418220023] [2020-09-24 20:44:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:44:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:44:36,661 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:44:36,661 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:44:36,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:44:36,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:44:36 BoogieIcfgContainer [2020-09-24 20:44:36,695 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:44:36,699 INFO L168 Benchmark]: Toolchain (without parser) took 18968.34 ms. Allocated memory was 138.9 MB in the beginning and 399.0 MB in the end (delta: 260.0 MB). Free memory was 101.9 MB in the beginning and 255.2 MB in the end (delta: -153.3 MB). Peak memory consumption was 106.8 MB. Max. memory is 7.1 GB. [2020-09-24 20:44:36,700 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 20:44:36,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 530.89 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 101.3 MB in the beginning and 176.8 MB in the end (delta: -75.5 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-09-24 20:44:36,702 INFO L168 Benchmark]: Boogie Preprocessor took 73.37 ms. Allocated memory is still 200.3 MB. Free memory was 176.8 MB in the beginning and 173.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-24 20:44:36,703 INFO L168 Benchmark]: RCFGBuilder took 819.19 ms. Allocated memory is still 200.3 MB. Free memory was 173.4 MB in the beginning and 129.0 MB in the end (delta: 44.4 MB). Peak memory consumption was 44.4 MB. Max. memory is 7.1 GB. [2020-09-24 20:44:36,704 INFO L168 Benchmark]: TraceAbstraction took 17534.95 ms. Allocated memory was 200.3 MB in the beginning and 399.0 MB in the end (delta: 198.7 MB). Free memory was 128.3 MB in the beginning and 255.2 MB in the end (delta: -126.8 MB). Peak memory consumption was 71.9 MB. Max. memory is 7.1 GB. [2020-09-24 20:44:36,707 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 530.89 ms. Allocated memory was 138.9 MB in the beginning and 200.3 MB in the end (delta: 61.3 MB). Free memory was 101.3 MB in the beginning and 176.8 MB in the end (delta: -75.5 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 73.37 ms. Allocated memory is still 200.3 MB. Free memory was 176.8 MB in the beginning and 173.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 819.19 ms. Allocated memory is still 200.3 MB. Free memory was 173.4 MB in the beginning and 129.0 MB in the end (delta: 44.4 MB). Peak memory consumption was 44.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17534.95 ms. Allocated memory was 200.3 MB in the beginning and 399.0 MB in the end (delta: 198.7 MB). Free memory was 128.3 MB in the beginning and 255.2 MB in the end (delta: -126.8 MB). Peak memory consumption was 71.9 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: [L108] 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; [L108] RET, EXPR nondet_tree() [L108] CALL task(nondet_tree()) [L84] 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; [L84] RET, EXPR min(t) [L84] int a = min(t); [L85] int b; [L87] CALL, EXPR size(t) [L79] COND FALSE !(!t) [L80] EXPR t->left [L80] CALL, EXPR size(t->left) [L79] COND TRUE !t [L79] return 0; [L80] RET, EXPR size(t->left) [L80] EXPR t->right [L80] CALL, EXPR size(t->right) [L79] COND TRUE !t [L79] return 0; [L80] RET, EXPR size(t->right) [L80] return size(t->left) + size(t->right) + 1; [L87] RET, EXPR size(t) [L87] int n = size(t); [L88] CALL assume_cycle_if_not(n != 0) [L9] COND FALSE !(!cond) [L88] RET assume_cycle_if_not(n != 0) [L89] EXPR, FCALL calloc(n, sizeof(int)) [L89] int *x = calloc(n, sizeof(int)); [L90] CALL tree_inorder(t, x, n) [L68] COND FALSE !(!t) [L71] EXPR t->left [L71] CALL, EXPR tree_inorder(t->left, a, i) [L68] COND TRUE !t [L69] return i; [L71] RET, EXPR tree_inorder(t->left, a, i) [L71] i = tree_inorder(t->left, a, i) [L72] EXPR i++ [L72] EXPR t->data [L72] a[i++] = t->data [L73] EXPR t->right [L73] CALL, EXPR tree_inorder(t->right, a, i) [L68] COND TRUE !t [L69] return i; [L73] RET, EXPR tree_inorder(t->right, a, i) [L73] i = tree_inorder(t->right, a, i) [L74] return i; [L90] RET tree_inorder(t, x, n) [L91] EXPR x[0] [L91] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 206 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.4s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 544 SDtfs, 1037 SDslu, 1716 SDs, 0 SdLazy, 3513 SolverSat, 355 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 118 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=206occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 34 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 426 NumberOfCodeBlocks, 426 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 78674 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 48/50 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...