/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=BIGGEST --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 [2020-10-12 21:15:36,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 21:15:36,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 21:15:36,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 21:15:36,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 21:15:36,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 21:15:36,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 21:15:36,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 21:15:36,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 21:15:36,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 21:15:36,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 21:15:36,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 21:15:36,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 21:15:36,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 21:15:36,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 21:15:36,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 21:15:36,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 21:15:36,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 21:15:36,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 21:15:36,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 21:15:36,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 21:15:36,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 21:15:36,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 21:15:36,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 21:15:36,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 21:15:36,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 21:15:36,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 21:15:36,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 21:15:36,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 21:15:36,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 21:15:36,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 21:15:36,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 21:15:36,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 21:15:36,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 21:15:36,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 21:15:36,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 21:15:36,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 21:15:36,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 21:15:36,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 21:15:36,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 21:15:36,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 21:15:36,121 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 [2020-10-12 21:15:36,143 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 21:15:36,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 21:15:36,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 21:15:36,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 21:15:36,144 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 21:15:36,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 21:15:36,145 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 21:15:36,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 21:15:36,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 21:15:36,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 21:15:36,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 21:15:36,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 21:15:36,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 21:15:36,146 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 21:15:36,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 21:15:36,147 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 21:15:36,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 21:15:36,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 21:15:36,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 21:15:36,147 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 21:15:36,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 21:15:36,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 21:15:36,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 21:15:36,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 21:15:36,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 21:15:36,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 21:15:36,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 21:15:36,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 21:15:36,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 21:15:36,149 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 21:15:36,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 21:15:36,446 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 21:15:36,449 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 21:15:36,450 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 21:15:36,451 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 21:15:36,452 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-10-12 21:15:36,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5adcc819/f5eee1d608fa4ed7afc712837b68de1e/FLAGd360fffb3 [2020-10-12 21:15:36,977 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 21:15:36,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_rec.c [2020-10-12 21:15:36,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5adcc819/f5eee1d608fa4ed7afc712837b68de1e/FLAGd360fffb3 [2020-10-12 21:15:37,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e5adcc819/f5eee1d608fa4ed7afc712837b68de1e [2020-10-12 21:15:37,342 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 21:15:37,344 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 21:15:37,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 21:15:37,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 21:15:37,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 21:15:37,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:15:37" (1/1) ... [2020-10-12 21:15:37,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2260ab44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:37, skipping insertion in model container [2020-10-12 21:15:37,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:15:37" (1/1) ... [2020-10-12 21:15:37,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 21:15:37,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 21:15:37,558 WARN L1484 CHandler]: Possible shadowing of function min [2020-10-12 21:15:37,560 WARN L1484 CHandler]: Possible shadowing of function min [2020-10-12 21:15:37,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 21:15:37,593 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 21:15:37,697 WARN L1484 CHandler]: Possible shadowing of function min [2020-10-12 21:15:37,698 WARN L1484 CHandler]: Possible shadowing of function min [2020-10-12 21:15:37,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 21:15:37,733 INFO L208 MainTranslator]: Completed translation [2020-10-12 21:15:37,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:37 WrapperNode [2020-10-12 21:15:37,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 21:15:37,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 21:15:37,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 21:15:37,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 21:15:37,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:37" (1/1) ... [2020-10-12 21:15:37,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:37" (1/1) ... [2020-10-12 21:15:37,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:37" (1/1) ... [2020-10-12 21:15:37,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:37" (1/1) ... [2020-10-12 21:15:37,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:37" (1/1) ... [2020-10-12 21:15:37,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:37" (1/1) ... [2020-10-12 21:15:37,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:37" (1/1) ... [2020-10-12 21:15:37,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 21:15:37,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 21:15:37,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 21:15:37,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 21:15:37,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:37" (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 [2020-10-12 21:15:37,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 21:15:37,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 21:15:37,844 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-10-12 21:15:37,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 21:15:37,845 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-12 21:15:37,845 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-12 21:15:37,845 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-12 21:15:37,846 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-12 21:15:37,846 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-12 21:15:37,846 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-12 21:15:37,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 21:15:37,848 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-12 21:15:37,848 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 21:15:37,848 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 21:15:37,849 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 21:15:37,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 21:15:37,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 21:15:37,849 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-10-12 21:15:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 21:15:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 21:15:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-12 21:15:37,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 21:15:37,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 21:15:37,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 21:15:37,852 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-12 21:15:37,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 21:15:37,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 21:15:37,852 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-12 21:15:37,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 21:15:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-12 21:15:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-12 21:15:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-12 21:15:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 21:15:37,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-12 21:15:37,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 21:15:37,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 21:15:37,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 21:15:38,332 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 21:15:38,332 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 21:15:38,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:15:38 BoogieIcfgContainer [2020-10-12 21:15:38,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 21:15:38,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 21:15:38,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 21:15:38,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 21:15:38,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:15:37" (1/3) ... [2020-10-12 21:15:38,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d60d759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:15:38, skipping insertion in model container [2020-10-12 21:15:38,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:15:37" (2/3) ... [2020-10-12 21:15:38,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d60d759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:15:38, skipping insertion in model container [2020-10-12 21:15:38,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:15:38" (3/3) ... [2020-10-12 21:15:38,349 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2020-10-12 21:15:38,361 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 21:15:38,369 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 21:15:38,383 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 21:15:38,408 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 21:15:38,408 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 21:15:38,409 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 21:15:38,409 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 21:15:38,409 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 21:15:38,409 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 21:15:38,409 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 21:15:38,409 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 21:15:38,430 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states. [2020-10-12 21:15:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 21:15:38,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:15:38,439 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] [2020-10-12 21:15:38,439 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:15:38,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:15:38,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1057238675, now seen corresponding path program 1 times [2020-10-12 21:15:38,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:15:38,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122112695] [2020-10-12 21:15:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:15:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:38,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:39,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:39,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 21:15:39,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:39,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-12 21:15:39,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:39,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 21:15:39,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 21:15:39,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 21:15:39,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 21:15:39,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:15:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:39,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:39,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:39,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:39,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:39,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 21:15:39,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:39,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:39,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:39,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:39,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16 [2020-10-12 21:15:39,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 21:15:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:39,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:39,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:39,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:39,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:39,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 21:15:39,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:39,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:39,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 21:15:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:39,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:39,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:39,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:39,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:39,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 21:15:39,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:39,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:39,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:39,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:39,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:39,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 21:15:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:39,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:39,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:39,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:39,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:39,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 21:15:39,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:39,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 21:15:39,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 21:15:39,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:39,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 21:15:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:39,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:39,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:39,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:39,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:39,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 21:15:39,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:39,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 21:15:39,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 21:15:39,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 21:15:39,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:39,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 21:15:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:39,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:39,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:39,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:39,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:39,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 21:15:39,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:39,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:39,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 21:15:39,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:39,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:39,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 21:15:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:39,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:39,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:39,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:39,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:39,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 21:15:39,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:39,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:39,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 21:15:39,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:39,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 21:15:39,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122112695] [2020-10-12 21:15:39,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:15:39,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 21:15:39,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525541770] [2020-10-12 21:15:39,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 21:15:39,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:15:39,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 21:15:39,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 21:15:39,441 INFO L87 Difference]: Start difference. First operand 97 states. Second operand 11 states. [2020-10-12 21:15:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:15:40,205 INFO L93 Difference]: Finished difference Result 171 states and 229 transitions. [2020-10-12 21:15:40,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 21:15:40,207 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-12 21:15:40,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:15:40,222 INFO L225 Difference]: With dead ends: 171 [2020-10-12 21:15:40,222 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 21:15:40,227 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 [2020-10-12 21:15:40,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 21:15:40,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-10-12 21:15:40,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 21:15:40,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2020-10-12 21:15:40,297 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 44 [2020-10-12 21:15:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:15:40,298 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2020-10-12 21:15:40,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 21:15:40,299 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2020-10-12 21:15:40,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 21:15:40,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:15:40,303 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] [2020-10-12 21:15:40,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 21:15:40,304 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:15:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:15:40,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1861604494, now seen corresponding path program 1 times [2020-10-12 21:15:40,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:15:40,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300055450] [2020-10-12 21:15:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:15:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:40,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:40,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:40,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:43,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:43,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 21:15:43,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 21:15:43,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2993 [2020-10-12 21:15:43,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:43,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 21:15:43,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 21:15:43,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 21:15:43,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:43,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:15:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:43,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:43,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:43,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:43,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:43,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 21:15:43,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:43,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:43,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 21:15:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:43,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:43,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:43,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:43,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:43,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 21:15:43,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:43,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 21:15:43,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:43,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 21:15:43,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:43,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-12 21:15:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:43,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:43,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:43,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:43,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:43,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 21:15:43,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 21:15:43,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 21:15:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:43,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 21:15:43,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:43,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 21:15:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:43,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:43,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:43,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 21:15:43,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:43,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 21:15:43,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:43,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 21:15:43,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 21:15:43,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 21:15:43,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:43,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 21:15:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:43,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:43,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:43,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:43,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:43,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 21:15:43,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:43,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:43,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:43,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 21:15:43,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:43,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 21:15:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:43,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:43,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:43,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:43,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:43,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 21:15:43,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:43,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:43,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 21:15:43,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:43,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 21:15:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:43,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:43,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:43,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:43,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:43,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:15:43,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:43,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:43,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 21:15:43,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:43,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:43,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 21:15:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:43,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:43,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:43,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:43,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:43,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 21:15:43,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:43,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:43,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 21:15:43,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:43,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:43,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 21:15:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:43,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:43,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:43,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:43,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 21:15:43,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:43,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:43,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 21:15:43,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:43,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 21:15:43,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300055450] [2020-10-12 21:15:43,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 21:15:43,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 21:15:43,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573585714] [2020-10-12 21:15:43,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 21:15:43,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:15:43,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 21:15:43,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 21:15:43,736 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand 14 states. [2020-10-12 21:15:44,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:15:44,828 INFO L93 Difference]: Finished difference Result 180 states and 236 transitions. [2020-10-12 21:15:44,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 21:15:44,829 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-12 21:15:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:15:44,832 INFO L225 Difference]: With dead ends: 180 [2020-10-12 21:15:44,832 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 21:15:44,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-12 21:15:44,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 21:15:44,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-10-12 21:15:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 21:15:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2020-10-12 21:15:44,852 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 56 [2020-10-12 21:15:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:15:44,853 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2020-10-12 21:15:44,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 21:15:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2020-10-12 21:15:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 21:15:44,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:15:44,856 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 21:15:44,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 21:15:44,857 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:15:44,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:15:44,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1030140767, now seen corresponding path program 1 times [2020-10-12 21:15:44,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:15:44,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536211495] [2020-10-12 21:15:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:15:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:44,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:44,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:44,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-12 21:15:49,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 21:15:49,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4145 [2020-10-12 21:15:49,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 21:15:49,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 21:15:49,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 21:15:49,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:49,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 21:15:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:49,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:49,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:49,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 21:15:49,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:49,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:49,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:49,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:49,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-12 21:15:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:49,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 21:15:49,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:49,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-12 21:15:49,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 21:15:49,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:49,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 21:15:49,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 21:15:49,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-12 21:15:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:49,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:49,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:49,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 21:15:49,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 21:15:49,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:49,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 21:15:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:49,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:49,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:49,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 21:15:49,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:49,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:49,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 21:15:49,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:49,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 21:15:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:49,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 21:15:49,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:49,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 21:15:49,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:49,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:49,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 21:15:49,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:49,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 21:15:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:49,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:49,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:49,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 21:15:49,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:49,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:49,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:49,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 21:15:49,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 21:15:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:49,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:49,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:49,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 21:15:49,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:49,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:49,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:49,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:49,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 21:15:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:49,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 21:15:49,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:49,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 21:15:49,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:49,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:49,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 21:15:49,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:49,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-12 21:15:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:49,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:49,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:49,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 21:15:49,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:49,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:49,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:49,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 21:15:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:49,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:49,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:49,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 21:15:49,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 21:15:49,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:49,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 21:15:49,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:49,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-12 21:15:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:49,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:49,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:49,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 21:15:49,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:49,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:49,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 21:15:49,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:49,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-12 21:15:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:49,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 21:15:49,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:49,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 21:15:49,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 21:15:49,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 21:15:49,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 21:15:49,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:49,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-12 21:15:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 21:15:49,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 21:15:49,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 21:15:49,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 21:15:49,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 21:15:49,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 21:15:49,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 21:15:49,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 21:15:49,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 21:15:49,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 21:15:49,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 21:15:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-12 21:15:49,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536211495] [2020-10-12 21:15:49,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 21:15:49,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-12 21:15:49,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164804649] [2020-10-12 21:15:49,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 21:15:49,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 21:15:49,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 21:15:49,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 21:15:49,480 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 13 states. [2020-10-12 21:15:50,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 21:15:50,247 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2020-10-12 21:15:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 21:15:50,249 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-10-12 21:15:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 21:15:50,255 INFO L225 Difference]: With dead ends: 149 [2020-10-12 21:15:50,255 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 21:15:50,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-10-12 21:15:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 21:15:50,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-12 21:15:50,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 21:15:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2020-10-12 21:15:50,285 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 79 [2020-10-12 21:15:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 21:15:50,286 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2020-10-12 21:15:50,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 21:15:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2020-10-12 21:15:50,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 21:15:50,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 21:15:50,294 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] [2020-10-12 21:15:50,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 21:15:50,295 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 21:15:50,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 21:15:50,295 INFO L82 PathProgramCache]: Analyzing trace with hash -299285422, now seen corresponding path program 1 times [2020-10-12 21:15:50,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 21:15:50,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098821682] [2020-10-12 21:15:50,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 21:15:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 21:15:50,359 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 21:15:50,360 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 21:15:50,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 21:15:50,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 09:15:50 BoogieIcfgContainer [2020-10-12 21:15:50,398 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 21:15:50,401 INFO L168 Benchmark]: Toolchain (without parser) took 13056.52 ms. Allocated memory was 141.6 MB in the beginning and 429.4 MB in the end (delta: 287.8 MB). Free memory was 102.5 MB in the beginning and 387.5 MB in the end (delta: -285.0 MB). Peak memory consumption was 249.3 MB. Max. memory is 7.1 GB. [2020-10-12 21:15:50,402 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-12 21:15:50,404 INFO L168 Benchmark]: CACSL2BoogieTranslator took 389.31 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 102.3 MB in the beginning and 180.5 MB in the end (delta: -78.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-10-12 21:15:50,406 INFO L168 Benchmark]: Boogie Preprocessor took 54.20 ms. Allocated memory is still 204.5 MB. Free memory was 180.5 MB in the beginning and 178.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-10-12 21:15:50,411 INFO L168 Benchmark]: RCFGBuilder took 548.96 ms. Allocated memory is still 204.5 MB. Free memory was 178.0 MB in the beginning and 143.9 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. [2020-10-12 21:15:50,411 INFO L168 Benchmark]: TraceAbstraction took 12059.23 ms. Allocated memory was 204.5 MB in the beginning and 429.4 MB in the end (delta: 224.9 MB). Free memory was 143.3 MB in the beginning and 387.5 MB in the end (delta: -244.2 MB). Peak memory consumption was 227.3 MB. Max. memory is 7.1 GB. [2020-10-12 21:15:50,422 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 389.31 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 102.3 MB in the beginning and 180.5 MB in the end (delta: -78.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.20 ms. Allocated memory is still 204.5 MB. Free memory was 180.5 MB in the beginning and 178.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 548.96 ms. Allocated memory is still 204.5 MB. Free memory was 178.0 MB in the beginning and 143.9 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12059.23 ms. Allocated memory was 204.5 MB in the beginning and 429.4 MB in the end (delta: 224.9 MB). Free memory was 143.3 MB in the beginning and 387.5 MB in the end (delta: -244.2 MB). Peak memory consumption was 227.3 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: 11.9s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 263 SDtfs, 372 SDslu, 1171 SDs, 0 SdLazy, 1493 SolverSat, 380 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred 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: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 8.7s InterpolantComputationTime, 270 NumberOfCodeBlocks, 270 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 176 ConstructedInterpolants, 0 QuantifiedInterpolants, 36214 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 43/45 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...