/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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-eb0fd7c [2020-09-21 12:37:14,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:37:14,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:37:14,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:37:14,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:37:14,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:37:14,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:37:14,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:37:14,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:37:14,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:37:14,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:37:14,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:37:14,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:37:14,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:37:14,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:37:14,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:37:14,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:37:14,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:37:14,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:37:14,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:37:14,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:37:14,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:37:14,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:37:14,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:37:14,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:37:14,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:37:14,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:37:14,719 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:37:14,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:37:14,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:37:14,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:37:14,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:37:14,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:37:14,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:37:14,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:37:14,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:37:14,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:37:14,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:37:14,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:37:14,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:37:14,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:37:14,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 12:37:14,754 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:37:14,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:37:14,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:37:14,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:37:14,757 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:37:14,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:37:14,757 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:37:14,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:37:14,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:37:14,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:37:14,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:37:14,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:37:14,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:37:14,759 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:37:14,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:37:14,759 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:37:14,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:37:14,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:37:14,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:37:14,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:37:14,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:37:14,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:37:14,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:37:14,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:37:14,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:37:14,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:37:14,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:37:14,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:37:14,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:37:14,762 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:37:15,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:37:15,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:37:15,288 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:37:15,290 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:37:15,291 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:37:15,293 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-09-21 12:37:15,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c70a4696f/0f78c85b87434c6680f3447641f09c90/FLAG74d3df4ba [2020-09-21 12:37:15,974 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:37:15,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_iter.c [2020-09-21 12:37:15,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c70a4696f/0f78c85b87434c6680f3447641f09c90/FLAG74d3df4ba [2020-09-21 12:37:16,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c70a4696f/0f78c85b87434c6680f3447641f09c90 [2020-09-21 12:37:16,290 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:37:16,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:37:16,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:37:16,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:37:16,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:37:16,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:37:16" (1/1) ... [2020-09-21 12:37:16,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bee85d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:16, skipping insertion in model container [2020-09-21 12:37:16,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:37:16" (1/1) ... [2020-09-21 12:37:16,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:37:16,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:37:16,579 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-21 12:37:16,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:37:16,615 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:37:16,641 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-21 12:37:16,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:37:16,763 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:37:16,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:16 WrapperNode [2020-09-21 12:37:16,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:37:16,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:37:16,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:37:16,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:37:16,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:16" (1/1) ... [2020-09-21 12:37:16,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:16" (1/1) ... [2020-09-21 12:37:16,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:16" (1/1) ... [2020-09-21 12:37:16,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:16" (1/1) ... [2020-09-21 12:37:16,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:16" (1/1) ... [2020-09-21 12:37:16,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:16" (1/1) ... [2020-09-21 12:37:16,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:16" (1/1) ... [2020-09-21 12:37:16,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:37:16,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:37:16,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:37:16,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:37:16,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:37:16,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:37:16,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:37:16,923 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_cycle_if_not [2020-09-21 12:37:16,923 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:37:16,923 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-09-21 12:37:16,923 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-09-21 12:37:16,923 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-09-21 12:37:16,924 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-09-21 12:37:16,924 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-09-21 12:37:16,924 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-09-21 12:37:16,924 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:37:16,924 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-21 12:37:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-21 12:37:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 12:37:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-21 12:37:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:37:16,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-21 12:37:16,927 INFO L130 BoogieDeclarations]: Found specification of procedure assume_cycle_if_not [2020-09-21 12:37:16,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:37:16,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:37:16,928 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-09-21 12:37:16,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:37:16,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 12:37:16,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 12:37:16,930 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-09-21 12:37:16,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 12:37:16,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 12:37:16,930 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-09-21 12:37:16,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:37:16,931 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-09-21 12:37:16,931 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-09-21 12:37:16,931 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-09-21 12:37:16,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 12:37:16,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-21 12:37:16,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:37:16,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:37:16,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:37:17,488 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:37:17,488 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 12:37:17,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:37:17 BoogieIcfgContainer [2020-09-21 12:37:17,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:37:17,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:37:17,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:37:17,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:37:17,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:37:16" (1/3) ... [2020-09-21 12:37:17,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350c26e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:37:17, skipping insertion in model container [2020-09-21 12:37:17,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:37:16" (2/3) ... [2020-09-21 12:37:17,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350c26e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:37:17, skipping insertion in model container [2020-09-21 12:37:17,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:37:17" (3/3) ... [2020-09-21 12:37:17,507 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter.c [2020-09-21 12:37:17,519 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:37:17,530 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:37:17,554 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:37:17,588 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:37:17,588 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:37:17,588 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:37:17,588 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:37:17,588 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:37:17,589 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:37:17,589 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:37:17,589 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:37:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2020-09-21 12:37:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 12:37:17,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:17,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:17,634 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:17,643 INFO L82 PathProgramCache]: Analyzing trace with hash 806421993, now seen corresponding path program 1 times [2020-09-21 12:37:17,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:17,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356386908] [2020-09-21 12:37:17,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:17,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:18,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:18,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-21 12:37:18,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:18,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-09-21 12:37:18,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:18,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:37:18,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 12:37:18,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 12:37:18,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:37:18,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:18,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:18,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:18,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:18,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:18,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:37:18,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:18,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:18,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:18,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:18,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:18,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:37:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:18,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:18,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:18,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:18,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:18,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-21 12:37:18,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:18,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:18,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:18,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:18,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:18,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 12:37:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:18,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:18,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:18,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:18,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:18,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 12:37:18,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:18,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:18,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:18,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:18,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:18,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 12:37:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:18,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:18,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:18,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:18,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:18,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 12:37:18,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:18,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:18,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:18,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:37:18,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:37:18,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 12:37:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:18,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:18,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:18,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:18,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:18,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 12:37:18,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:18,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:37:18,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:37:18,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:18,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:18,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 12:37:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:18,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:18,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:18,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:18,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:18,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:37:18,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:37:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:18,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:18,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 12:37:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:18,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:18,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:18,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:18,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:18,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:37:18,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:18,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:18,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:37:18,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:18,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:37:18,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356386908] [2020-09-21 12:37:18,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:37:18,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-21 12:37:18,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148660354] [2020-09-21 12:37:18,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:37:18,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:18,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:37:18,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:37:18,929 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 11 states. [2020-09-21 12:37:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:19,751 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2020-09-21 12:37:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:37:19,754 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-21 12:37:19,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:19,773 INFO L225 Difference]: With dead ends: 174 [2020-09-21 12:37:19,773 INFO L226 Difference]: Without dead ends: 98 [2020-09-21 12:37:19,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-21 12:37:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-21 12:37:19,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-09-21 12:37:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-21 12:37:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2020-09-21 12:37:19,886 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 44 [2020-09-21 12:37:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:19,888 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2020-09-21 12:37:19,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:37:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2020-09-21 12:37:19,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 12:37:19,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:19,895 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:19,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:37:19,896 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:19,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1561052270, now seen corresponding path program 1 times [2020-09-21 12:37:19,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:19,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309541371] [2020-09-21 12:37:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:19,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:20,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:20,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:20,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:20,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-21 12:37:20,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:37:20,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:37:20,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:20,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:37:20,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:37:20,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:37:20,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:20,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:20,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:20,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:20,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:20,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:20,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:37:20,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:20,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:20,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:21,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:37:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:21,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:21,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:21,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:21,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:21,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:37:21,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:21,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:21,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:21,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:21,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:21,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 12:37:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:21,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:21,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:21,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:21,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:21,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 12:37:21,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:21,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:37:21,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:21,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:37:21,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:21,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 12:37:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:21,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:21,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:21,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:37:21,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:21,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-21 12:37:21,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:21,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:37:21,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:37:21,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 12:37:21,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:21,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 12:37:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:21,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:21,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:21,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:21,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:21,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:37:21,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:21,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:21,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:21,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:21,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:21,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:37:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:21,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:21,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:21,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:21,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:21,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:37:21,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:21,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:21,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:21,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:21,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:21,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 12:37:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:21,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:21,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:21,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:21,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:21,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:37:21,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:21,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:37:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:21,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:21,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 12:37:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:21,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:21,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:21,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:21,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:21,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:37:21,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:21,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:37:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:21,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:21,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-21 12:37:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:21,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:21,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:21,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:21,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:21,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:37:21,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:21,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:21,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:37:21,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:21,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-21 12:37:21,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309541371] [2020-09-21 12:37:21,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:21,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:37:21,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215946539] [2020-09-21 12:37:21,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:37:21,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:21,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:37:21,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:37:21,334 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand 11 states. [2020-09-21 12:37:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:22,258 INFO L93 Difference]: Finished difference Result 165 states and 212 transitions. [2020-09-21 12:37:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:37:22,259 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-09-21 12:37:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:22,263 INFO L225 Difference]: With dead ends: 165 [2020-09-21 12:37:22,263 INFO L226 Difference]: Without dead ends: 100 [2020-09-21 12:37:22,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-09-21 12:37:22,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-21 12:37:22,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2020-09-21 12:37:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-21 12:37:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-09-21 12:37:22,287 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 56 [2020-09-21 12:37:22,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:22,288 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-09-21 12:37:22,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:37:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-09-21 12:37:22,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-21 12:37:22,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:22,301 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:22,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:37:22,301 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash 449887654, now seen corresponding path program 1 times [2020-09-21 12:37:22,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:22,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739234486] [2020-09-21 12:37:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:22,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:22,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-21 12:37:23,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:37:23,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-21 12:37:23,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:37:23,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:37:23,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:37:23,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:23,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:23,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:23,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:23,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:37:23,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:23,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:23,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:37:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:23,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:23,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:23,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 12:37:23,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:37:23,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:23,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:37:23,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:23,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 12:37:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:23,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 12:37:23,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:23,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-21 12:37:23,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:37:23,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:37:23,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 12:37:23,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:23,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 12:37:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:23,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:23,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:23,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:37:23,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:23,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:23,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:23,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:23,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:37:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:23,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:23,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:23,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-21 12:37:23,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:23,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:23,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:23,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:37:23,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 12:37:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:23,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:37:23,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:23,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 12:37:23,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:23,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:37:23,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:23,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:23,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 12:37:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:23,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:23,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:23,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:37:23,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:23,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:23,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:23,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:23,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:37:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:23,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:23,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:23,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:37:23,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:23,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:23,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:23,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:23,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 12:37:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:23,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:23,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:23,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:37:23,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:23,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:37:23,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:23,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:23,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-21 12:37:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:23,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:23,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:23,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:37:23,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:23,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 12:37:23,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:23,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:23,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-21 12:37:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:23,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:23,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:23,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:23,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:23,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:37:23,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:23,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:23,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-21 12:37:23,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:23,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 12:37:23,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739234486] [2020-09-21 12:37:23,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:23,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 12:37:23,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785776362] [2020-09-21 12:37:23,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 12:37:23,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:23,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 12:37:23,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:37:23,786 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 12 states. [2020-09-21 12:37:24,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:24,552 INFO L93 Difference]: Finished difference Result 167 states and 214 transitions. [2020-09-21 12:37:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:37:24,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-09-21 12:37:24,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:24,556 INFO L225 Difference]: With dead ends: 167 [2020-09-21 12:37:24,557 INFO L226 Difference]: Without dead ends: 99 [2020-09-21 12:37:24,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-09-21 12:37:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-21 12:37:24,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-09-21 12:37:24,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-21 12:37:24,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2020-09-21 12:37:24,577 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 69 [2020-09-21 12:37:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:24,578 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2020-09-21 12:37:24,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 12:37:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2020-09-21 12:37:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-21 12:37:24,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:24,580 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:24,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:37:24,584 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:24,585 INFO L82 PathProgramCache]: Analyzing trace with hash -62868055, now seen corresponding path program 1 times [2020-09-21 12:37:24,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:24,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489117175] [2020-09-21 12:37:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:24,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:24,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:24,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:25,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:25,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-09-21 12:37:25,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:37:25,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1024 [2020-09-21 12:37:25,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:37:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-09-21 12:37:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-21 12:37:25,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:25,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:37:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:25,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:25,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:25,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:25,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:25,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:37:25,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:25,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:25,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:25,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:25,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:25,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 12:37:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:25,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:25,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:25,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 12:37:25,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:25,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 12:37:25,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:25,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:25,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:25,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:25,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:25,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-21 12:37:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:25,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:25,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:25,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:25,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:25,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:37:25,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:25,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:25,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:25,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:25,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:25,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:37:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:25,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:25,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:25,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:25,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:25,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:37:25,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:25,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:25,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:25,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:25,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:25,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 12:37:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:25,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:25,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:25,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 12:37:25,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:25,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-21 12:37:25,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:25,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:37:25,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:25,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 12:37:25,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:37:26,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 12:37:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:26,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:26,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:26,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:26,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:26,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-21 12:37:26,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:26,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:26,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:26,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:26,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:26,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:37:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:26,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:26,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:26,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:26,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:26,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 12:37:26,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:26,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:26,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:26,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:26,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:26,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 12:37:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:26,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:26,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:26,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:26,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:37:26,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:37:26,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-21 12:37:26,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:26,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:26,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:26,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 12:37:26,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:26,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 12:37:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:26,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:26,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:26,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:26,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:26,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:37:26,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:26,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:26,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:26,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:26,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:26,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 12:37:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:26,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:26,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:26,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:26,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:26,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 12:37:26,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:26,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:37:26,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:26,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:37:26,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:26,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-21 12:37:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:26,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:26,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:26,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:26,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:26,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 12:37:26,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:26,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:26,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:26,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-21 12:37:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:26,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:26,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:26,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:37:26,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 12:37:26,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:37:26,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:37:26,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:37:26,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:26,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 12:37:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:37:26,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:37:26,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:37:26,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:37:26,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:37:26,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-21 12:37:26,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:37:26,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:37:26,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:37:26,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:37:26,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:37:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-09-21 12:37:26,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489117175] [2020-09-21 12:37:26,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:37:26,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:37:26,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31141992] [2020-09-21 12:37:26,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:37:26,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:37:26,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:37:26,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:37:26,357 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand 11 states. [2020-09-21 12:37:27,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:37:27,176 INFO L93 Difference]: Finished difference Result 152 states and 194 transitions. [2020-09-21 12:37:27,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 12:37:27,176 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-09-21 12:37:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:37:27,180 INFO L225 Difference]: With dead ends: 152 [2020-09-21 12:37:27,180 INFO L226 Difference]: Without dead ends: 99 [2020-09-21 12:37:27,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-21 12:37:27,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-21 12:37:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-09-21 12:37:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-21 12:37:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2020-09-21 12:37:27,197 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 79 [2020-09-21 12:37:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:37:27,197 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2020-09-21 12:37:27,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:37:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2020-09-21 12:37:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-21 12:37:27,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:37:27,199 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:37:27,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:37:27,200 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:37:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:37:27,200 INFO L82 PathProgramCache]: Analyzing trace with hash -708508396, now seen corresponding path program 1 times [2020-09-21 12:37:27,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:37:27,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420500487] [2020-09-21 12:37:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:37:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 12:37:27,251 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 12:37:27,251 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 12:37:27,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:37:27,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:37:27 BoogieIcfgContainer [2020-09-21 12:37:27,283 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:37:27,286 INFO L168 Benchmark]: Toolchain (without parser) took 10993.26 ms. Allocated memory was 138.9 MB in the beginning and 315.6 MB in the end (delta: 176.7 MB). Free memory was 101.6 MB in the beginning and 198.2 MB in the end (delta: -96.6 MB). Peak memory consumption was 80.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:37:27,287 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-21 12:37:27,288 INFO L168 Benchmark]: CACSL2BoogieTranslator took 467.11 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 101.2 MB in the beginning and 180.4 MB in the end (delta: -79.2 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-09-21 12:37:27,289 INFO L168 Benchmark]: Boogie Preprocessor took 83.59 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 178.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:37:27,290 INFO L168 Benchmark]: RCFGBuilder took 646.51 ms. Allocated memory is still 202.4 MB. Free memory was 177.1 MB in the beginning and 142.3 MB in the end (delta: 34.8 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:37:27,291 INFO L168 Benchmark]: TraceAbstraction took 9786.64 ms. Allocated memory was 202.4 MB in the beginning and 315.6 MB in the end (delta: 113.2 MB). Free memory was 141.3 MB in the beginning and 198.2 MB in the end (delta: -57.0 MB). Peak memory consumption was 56.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:37:27,295 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.1 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 467.11 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 101.2 MB in the beginning and 180.4 MB in the end (delta: -79.2 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 83.59 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 178.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 646.51 ms. Allocated memory is still 202.4 MB. Free memory was 177.1 MB in the beginning and 142.3 MB in the end (delta: 34.8 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9786.64 ms. Allocated memory was 202.4 MB in the beginning and 315.6 MB in the end (delta: 113.2 MB). Free memory was 141.3 MB in the beginning and 198.2 MB in the end (delta: -57.0 MB). Peak memory consumption was 56.3 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: [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, 98 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.6s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 343 SDtfs, 533 SDslu, 1194 SDs, 0 SdLazy, 1700 SolverSat, 472 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred 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, 4 MinimizatonAttempts, 20 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 339 NumberOfCodeBlocks, 339 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 244 ConstructedInterpolants, 0 QuantifiedInterpolants, 63065 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 63/69 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...