/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 15:56:16,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 15:56:16,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 15:56:16,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 15:56:16,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 15:56:16,589 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 15:56:16,591 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 15:56:16,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 15:56:16,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 15:56:16,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 15:56:16,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 15:56:16,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 15:56:16,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 15:56:16,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 15:56:16,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 15:56:16,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 15:56:16,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 15:56:16,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 15:56:16,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 15:56:16,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 15:56:16,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 15:56:16,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 15:56:16,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 15:56:16,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 15:56:16,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 15:56:16,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 15:56:16,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 15:56:16,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 15:56:16,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 15:56:16,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 15:56:16,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 15:56:16,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 15:56:16,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 15:56:16,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 15:56:16,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 15:56:16,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 15:56:16,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 15:56:16,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 15:56:16,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 15:56:16,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 15:56:16,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 15:56:16,656 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 15:56:16,692 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 15:56:16,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 15:56:16,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 15:56:16,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 15:56:16,695 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 15:56:16,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 15:56:16,695 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 15:56:16,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 15:56:16,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 15:56:16,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 15:56:16,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 15:56:16,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 15:56:16,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 15:56:16,697 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 15:56:16,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 15:56:16,698 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 15:56:16,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 15:56:16,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 15:56:16,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 15:56:16,699 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 15:56:16,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 15:56:16,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:56:16,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 15:56:16,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 15:56:16,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 15:56:16,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 15:56:16,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 15:56:16,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 15:56:16,700 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 15:56:16,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 15:56:17,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 15:56:17,034 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 15:56:17,039 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 15:56:17,042 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 15:56:17,042 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 15:56:17,043 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-10-13 15:56:17,110 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de8a49d7a/5ded10466e134439add4c47ada03d4de/FLAG55f2b6188 [2020-10-13 15:56:17,571 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 15:56:17,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_iter_incorrect.c [2020-10-13 15:56:17,579 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de8a49d7a/5ded10466e134439add4c47ada03d4de/FLAG55f2b6188 [2020-10-13 15:56:17,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de8a49d7a/5ded10466e134439add4c47ada03d4de [2020-10-13 15:56:17,976 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 15:56:17,977 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 15:56:17,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 15:56:17,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 15:56:17,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 15:56:17,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:56:17" (1/1) ... [2020-10-13 15:56:17,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16661b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:56:17, skipping insertion in model container [2020-10-13 15:56:17,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:56:17" (1/1) ... [2020-10-13 15:56:17,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 15:56:18,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 15:56:18,208 WARN L1484 CHandler]: Possible shadowing of function min [2020-10-13 15:56:18,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:56:18,238 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 15:56:18,349 WARN L1484 CHandler]: Possible shadowing of function min [2020-10-13 15:56:18,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:56:18,384 INFO L208 MainTranslator]: Completed translation [2020-10-13 15:56:18,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:56:18 WrapperNode [2020-10-13 15:56:18,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 15:56:18,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 15:56:18,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 15:56:18,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 15:56:18,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:56:18" (1/1) ... [2020-10-13 15:56:18,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:56:18" (1/1) ... [2020-10-13 15:56:18,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:56:18" (1/1) ... [2020-10-13 15:56:18,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:56:18" (1/1) ... [2020-10-13 15:56:18,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:56:18" (1/1) ... [2020-10-13 15:56:18,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:56:18" (1/1) ... [2020-10-13 15:56:18,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:56:18" (1/1) ... [2020-10-13 15:56:18,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 15:56:18,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 15:56:18,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 15:56:18,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 15:56:18,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:56:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:56:18,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 15:56:18,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 15:56:18,512 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 15:56:18,512 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 15:56:18,512 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-13 15:56:18,513 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-10-13 15:56:18,514 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-10-13 15:56:18,514 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-10-13 15:56:18,514 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-10-13 15:56:18,514 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-13 15:56:18,515 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 15:56:18,515 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-13 15:56:18,515 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 15:56:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 15:56:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 15:56:18,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 15:56:18,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 15:56:18,518 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 15:56:18,518 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 15:56:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 15:56:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 15:56:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-13 15:56:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 15:56:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 15:56:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 15:56:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-10-13 15:56:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 15:56:18,522 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-10-13 15:56:18,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 15:56:18,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 15:56:18,522 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-10-13 15:56:18,522 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-10-13 15:56:18,522 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-13 15:56:18,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 15:56:18,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-13 15:56:18,523 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 15:56:18,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 15:56:18,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 15:56:19,017 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 15:56:19,018 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 15:56:19,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:56:19 BoogieIcfgContainer [2020-10-13 15:56:19,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 15:56:19,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 15:56:19,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 15:56:19,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 15:56:19,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 03:56:17" (1/3) ... [2020-10-13 15:56:19,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a01d4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:56:19, skipping insertion in model container [2020-10-13 15:56:19,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:56:18" (2/3) ... [2020-10-13 15:56:19,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a01d4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:56:19, skipping insertion in model container [2020-10-13 15:56:19,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:56:19" (3/3) ... [2020-10-13 15:56:19,033 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2020-10-13 15:56:19,044 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 15:56:19,052 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 15:56:19,065 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 15:56:19,091 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 15:56:19,091 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 15:56:19,091 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 15:56:19,092 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 15:56:19,092 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 15:56:19,092 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 15:56:19,092 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 15:56:19,093 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 15:56:19,114 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2020-10-13 15:56:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 15:56:19,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:19,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:19,125 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:19,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:19,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1213743031, now seen corresponding path program 1 times [2020-10-13 15:56:19,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:19,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560758899] [2020-10-13 15:56:19,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:19,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:19,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:19,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 15:56:19,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:19,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-13 15:56:19,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:19,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:19,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 15:56:19,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:19,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 15:56:19,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:19,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:19,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:19,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:19,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:19,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 15:56:19,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:19,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:19,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:19,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:19,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:19,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:56:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:19,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:19,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:19,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:19,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:19,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 15:56:19,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:19,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:19,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:19,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:19,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:19,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 15:56:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:19,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:19,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:19,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:19,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:19,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:56:19,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:19,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:19,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:19,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:19,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:19,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:56:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:19,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:19,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:19,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:19,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:19,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:56:19,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:19,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:19,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:19,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:19,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:19,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 15:56:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:19,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:19,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:19,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:19,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:19,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:56:19,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:19,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:19,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 15:56:19,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:19,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:19,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 15:56:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:19,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:19,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:19,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:19,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:19,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:56:19,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 15:56:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:19,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:19,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 15:56:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:19,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:19,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:19,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:19,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:19,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:56:19,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:19,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:19,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 15:56:19,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:19,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:56:19,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560758899] [2020-10-13 15:56:19,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:56:19,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 15:56:19,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215330141] [2020-10-13 15:56:19,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 15:56:19,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:19,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 15:56:19,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:56:19,760 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 6 states. [2020-10-13 15:56:20,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:20,203 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2020-10-13 15:56:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:56:20,205 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-13 15:56:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:20,217 INFO L225 Difference]: With dead ends: 168 [2020-10-13 15:56:20,218 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 15:56:20,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 15:56:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 15:56:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2020-10-13 15:56:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 15:56:20,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2020-10-13 15:56:20,285 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 44 [2020-10-13 15:56:20,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:20,286 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2020-10-13 15:56:20,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 15:56:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2020-10-13 15:56:20,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 15:56:20,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:20,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:20,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 15:56:20,290 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:20,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1392280523, now seen corresponding path program 1 times [2020-10-13 15:56:20,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:20,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682805640] [2020-10-13 15:56:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:20,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:20,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:20,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 15:56:20,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:20,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-13 15:56:20,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:20,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 15:56:20,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 15:56:20,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 15:56:20,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:20,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:20,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:20,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:20,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:20,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:20,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:20,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:20,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:20,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:20,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:56:20,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:20,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:20,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:20,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:20,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:20,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:56:20,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:20,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:20,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:20,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:20,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 15:56:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:20,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:20,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:20,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:20,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:20,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:20,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:20,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:20,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:20,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:20,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:20,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:56:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:20,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:20,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:20,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:20,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:20,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:56:20,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:20,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:56:20,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:20,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 15:56:20,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:20,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-13 15:56:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:20,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:20,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:20,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:20,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:20,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:56:20,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:20,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:56:20,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 15:56:20,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:20,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:20,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 15:56:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:20,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:20,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:20,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:20,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:20,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 15:56:20,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:20,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:20,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 15:56:20,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:20,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:20,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 15:56:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:20,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:20,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:20,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:20,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:20,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:56:20,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:20,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:20,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 15:56:20,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:20,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 15:56:20,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682805640] [2020-10-13 15:56:20,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:56:20,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 15:56:20,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144585225] [2020-10-13 15:56:20,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 15:56:20,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:20,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 15:56:20,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-13 15:56:20,832 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand 11 states. [2020-10-13 15:56:21,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:21,439 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2020-10-13 15:56:21,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 15:56:21,440 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-13 15:56:21,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:21,443 INFO L225 Difference]: With dead ends: 154 [2020-10-13 15:56:21,443 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 15:56:21,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-13 15:56:21,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 15:56:21,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2020-10-13 15:56:21,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 15:56:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-10-13 15:56:21,463 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 44 [2020-10-13 15:56:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:21,463 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-10-13 15:56:21,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 15:56:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-10-13 15:56:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 15:56:21,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:21,466 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:21,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 15:56:21,466 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:21,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1672920772, now seen corresponding path program 1 times [2020-10-13 15:56:21,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:21,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132160062] [2020-10-13 15:56:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:21,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:21,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:21,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:24,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:24,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 15:56:24,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 15:56:24,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2633 [2020-10-13 15:56:24,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:24,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 15:56:24,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 15:56:24,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 15:56:24,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 15:56:24,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:24,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:24,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:24,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:24,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:24,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:56:24,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:24,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:24,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:24,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:56:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:24,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:24,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:24,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:24,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:24,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:56:24,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:24,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:24,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:24,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:24,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:24,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 15:56:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:24,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:24,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:24,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:24,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:24,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 15:56:24,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:24,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:56:24,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:24,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:24,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 15:56:24,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:56:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:24,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:24,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:24,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:56:24,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:24,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-13 15:56:24,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:24,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:56:24,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 15:56:24,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 15:56:24,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:24,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 15:56:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:24,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:24,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:24,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:24,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:24,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:56:24,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:24,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:24,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:24,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:24,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:24,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 15:56:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:24,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:24,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:24,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:24,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:24,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:56:24,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:24,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:24,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:24,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:24,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:24,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-13 15:56:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:24,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:24,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:24,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:24,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:24,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:24,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:24,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:24,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 15:56:24,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:24,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:24,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 15:56:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:24,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:24,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:24,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:24,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:24,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:24,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:24,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:24,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 15:56:24,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:24,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:24,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 15:56:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:24,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:24,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:24,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:24,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:24,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:56:24,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:24,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:24,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 15:56:24,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:24,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 15:56:24,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132160062] [2020-10-13 15:56:24,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:24,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 15:56:24,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306727827] [2020-10-13 15:56:24,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 15:56:24,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:24,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 15:56:24,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-13 15:56:24,500 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 11 states. [2020-10-13 15:56:25,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:25,225 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2020-10-13 15:56:25,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 15:56:25,226 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-13 15:56:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:25,228 INFO L225 Difference]: With dead ends: 164 [2020-10-13 15:56:25,229 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 15:56:25,230 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 [2020-10-13 15:56:25,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 15:56:25,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-10-13 15:56:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 15:56:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2020-10-13 15:56:25,245 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 56 [2020-10-13 15:56:25,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:25,245 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2020-10-13 15:56:25,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 15:56:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2020-10-13 15:56:25,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 15:56:25,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:25,248 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] [2020-10-13 15:56:25,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:56:25,249 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:25,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:25,249 INFO L82 PathProgramCache]: Analyzing trace with hash -295341752, now seen corresponding path program 1 times [2020-10-13 15:56:25,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:25,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447578182] [2020-10-13 15:56:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:25,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:25,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:25,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:25,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:27,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:27,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 15:56:27,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 15:56:27,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1987 [2020-10-13 15:56:27,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:27,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 15:56:27,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 15:56:27,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 15:56:27,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:27,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:27,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:27,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:27,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:27,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:27,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:27,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:27,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:27,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:27,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:27,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:27,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:56:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:27,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:27,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:27,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:27,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:27,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:56:27,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:27,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:56:27,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:27,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 15:56:27,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:27,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 15:56:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:27,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:27,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:27,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 15:56:27,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:27,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 15:56:27,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:56:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 15:56:27,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 15:56:27,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:27,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 15:56:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:27,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:27,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:27,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:27,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:27,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:56:27,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:27,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:27,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:27,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:27,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:27,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 15:56:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:27,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:27,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:27,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:27,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:27,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:56:27,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:27,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:27,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:27,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:27,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:27,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-13 15:56:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:27,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:27,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:27,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:56:27,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:27,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 15:56:27,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:27,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:27,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 15:56:27,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:27,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:27,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 15:56:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:27,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:27,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:27,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:27,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:27,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:27,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:27,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:27,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:27,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:27,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:27,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 15:56:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:27,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:27,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:27,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:27,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:27,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:27,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:27,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:27,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:27,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:27,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:27,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 15:56:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:27,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:27,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:27,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:27,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:27,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:27,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:27,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:27,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 15:56:27,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:27,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:27,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 15:56:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:27,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:27,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:27,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:27,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:27,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:27,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:27,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:27,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 15:56:27,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:27,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:27,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 15:56:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:27,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:27,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:27,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:27,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:27,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:27,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:27,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:27,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 15:56:27,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:27,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 15:56:27,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447578182] [2020-10-13 15:56:27,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:27,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 15:56:27,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182005823] [2020-10-13 15:56:27,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 15:56:27,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:27,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 15:56:27,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-13 15:56:27,605 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand 12 states. [2020-10-13 15:56:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:28,450 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2020-10-13 15:56:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 15:56:28,450 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-13 15:56:28,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:28,452 INFO L225 Difference]: With dead ends: 166 [2020-10-13 15:56:28,452 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 15:56:28,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-10-13 15:56:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 15:56:28,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-10-13 15:56:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 15:56:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-10-13 15:56:28,467 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 69 [2020-10-13 15:56:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:28,468 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-10-13 15:56:28,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 15:56:28,468 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-10-13 15:56:28,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 15:56:28,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:28,470 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:28,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:56:28,470 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:28,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1598247989, now seen corresponding path program 1 times [2020-10-13 15:56:28,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:28,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039414675] [2020-10-13 15:56:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:28,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:28,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:28,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:31,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:31,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 15:56:31,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 15:56:31,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3110 [2020-10-13 15:56:31,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:31,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 15:56:31,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 15:56:31,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 15:56:31,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:31,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:31,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:31,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:31,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:31,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:31,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:31,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:31,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:31,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:31,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:31,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:31,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-13 15:56:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:31,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:31,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:31,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 15:56:31,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:31,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 15:56:31,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:31,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:31,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:31,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:31,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:31,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-13 15:56:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:31,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:31,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:31,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:31,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:31,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:31,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:31,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:31,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:31,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:31,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:31,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:31,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:31,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:31,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:31,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:31,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:56:31,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:31,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:31,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:31,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:31,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:31,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-13 15:56:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:31,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:31,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:31,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 15:56:31,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:31,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:56:31,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:31,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:31,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:31,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:31,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:31,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 15:56:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:31,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:31,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:31,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:31,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:31,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:31,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:31,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:31,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:31,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:31,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 15:56:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:31,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:31,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:31,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:31,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:31,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:31,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:31,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:31,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:31,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:31,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:31,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 15:56:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:31,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:31,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:31,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 15:56:31,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:31,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-13 15:56:31,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:31,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:56:31,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:31,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 15:56:31,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:31,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-13 15:56:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:31,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:31,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:31,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:31,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:31,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:56:31,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:31,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:31,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:31,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:31,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:31,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 15:56:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:31,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:31,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:31,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:31,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:31,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:56:31,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:31,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:31,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:31,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:31,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:31,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-13 15:56:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:31,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:31,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:31,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:31,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:31,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:56:31,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:31,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:31,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:31,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:31,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:31,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-13 15:56:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:31,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:31,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:31,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:31,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:31,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:56:31,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:31,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:31,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 15:56:31,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:31,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-13 15:56:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:31,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:32,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:32,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:32,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:32,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 15:56:32,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:32,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:56:32,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 15:56:32,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:32,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 15:56:32,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039414675] [2020-10-13 15:56:32,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:32,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 15:56:32,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814147933] [2020-10-13 15:56:32,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 15:56:32,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:32,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 15:56:32,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-13 15:56:32,076 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 11 states. [2020-10-13 15:56:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:32,884 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2020-10-13 15:56:32,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 15:56:32,884 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-10-13 15:56:32,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:32,886 INFO L225 Difference]: With dead ends: 155 [2020-10-13 15:56:32,886 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 15:56:32,888 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 [2020-10-13 15:56:32,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 15:56:32,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-10-13 15:56:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 15:56:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 127 transitions. [2020-10-13 15:56:32,911 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 127 transitions. Word has length 79 [2020-10-13 15:56:32,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:32,911 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 127 transitions. [2020-10-13 15:56:32,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 15:56:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 127 transitions. [2020-10-13 15:56:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 15:56:32,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:32,914 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:32,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:56:32,915 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:32,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1471493578, now seen corresponding path program 1 times [2020-10-13 15:56:32,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:32,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705000313] [2020-10-13 15:56:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 15:56:32,946 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 15:56:32,946 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 15:56:32,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:56:32,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 03:56:32 BoogieIcfgContainer [2020-10-13 15:56:32,980 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 15:56:32,983 INFO L168 Benchmark]: Toolchain (without parser) took 15004.77 ms. Allocated memory was 148.9 MB in the beginning and 434.1 MB in the end (delta: 285.2 MB). Free memory was 105.0 MB in the beginning and 324.5 MB in the end (delta: -219.4 MB). Peak memory consumption was 65.8 MB. Max. memory is 7.1 GB. [2020-10-13 15:56:32,989 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 211.9 kB). Peak memory consumption was 211.9 kB. Max. memory is 7.1 GB. [2020-10-13 15:56:32,991 INFO L168 Benchmark]: CACSL2BoogieTranslator took 406.98 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 104.8 MB in the beginning and 181.0 MB in the end (delta: -76.2 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-10-13 15:56:32,992 INFO L168 Benchmark]: Boogie Preprocessor took 54.53 ms. Allocated memory is still 205.0 MB. Free memory was 181.0 MB in the beginning and 178.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-10-13 15:56:32,993 INFO L168 Benchmark]: RCFGBuilder took 583.28 ms. Allocated memory is still 205.0 MB. Free memory was 178.2 MB in the beginning and 143.9 MB in the end (delta: 34.2 MB). Peak memory consumption was 34.2 MB. Max. memory is 7.1 GB. [2020-10-13 15:56:32,993 INFO L168 Benchmark]: TraceAbstraction took 13953.74 ms. Allocated memory was 205.0 MB in the beginning and 434.1 MB in the end (delta: 229.1 MB). Free memory was 143.3 MB in the beginning and 324.5 MB in the end (delta: -181.2 MB). Peak memory consumption was 47.9 MB. Max. memory is 7.1 GB. [2020-10-13 15:56:33,007 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 211.9 kB). Peak memory consumption was 211.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 406.98 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 104.8 MB in the beginning and 181.0 MB in the end (delta: -76.2 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.53 ms. Allocated memory is still 205.0 MB. Free memory was 181.0 MB in the beginning and 178.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 583.28 ms. Allocated memory is still 205.0 MB. Free memory was 178.2 MB in the beginning and 143.9 MB in the end (delta: 34.2 MB). Peak memory consumption was 34.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13953.74 ms. Allocated memory was 205.0 MB in the beginning and 434.1 MB in the end (delta: 229.1 MB). Free memory was 143.3 MB in the beginning and 324.5 MB in the end (delta: -181.2 MB). Peak memory consumption was 47.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L103] 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; [L103] RET, EXPR nondet_tree() [L103] CALL task(nondet_tree()) [L81] CALL, EXPR min(t) [L35] COND FALSE !(!n) [L38] EXPR n->left [L38] CALL, EXPR min(n->left) [L35] COND TRUE !n [L36] return 2147483647; [L38] RET, EXPR min(n->left) [L38] int a = min(n->left); [L39] EXPR n->right [L39] CALL, EXPR min(n->right) [L35] COND TRUE !n [L36] return 2147483647; [L39] RET, EXPR min(n->right) [L39] int b = min(n->right); [L40] COND TRUE a <= b [L40] return a; [L81] RET, EXPR min(t) [L81] int a = min(t); [L82] int b; [L84] CALL, EXPR size(t) [L76] COND FALSE !(!t) [L77] EXPR t->left [L77] CALL, EXPR size(t->left) [L76] COND TRUE !t [L76] return 0; [L77] RET, EXPR size(t->left) [L77] EXPR t->right [L77] CALL, EXPR size(t->right) [L76] COND TRUE !t [L76] return 0; [L77] RET, EXPR size(t->right) [L77] return size(t->left) + size(t->right) + 1; [L84] RET, EXPR size(t) [L84] int n = size(t); [L85] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L85] RET assume_abort_if_not(n != 0) [L86] EXPR, FCALL calloc(n, sizeof(int)) [L86] int *x = calloc(n, sizeof(int)); [L87] CALL tree_inorder(t, x, n) [L65] COND FALSE !(!t) [L68] EXPR t->left [L68] CALL, EXPR tree_inorder(t->left, a, i) [L65] COND TRUE !t [L66] return i; [L68] RET, EXPR tree_inorder(t->left, a, i) [L68] i = tree_inorder(t->left, a, i) [L69] EXPR i++ [L69] EXPR t->data [L69] a[i++] = t->data [L70] EXPR t->right [L70] CALL, EXPR tree_inorder(t->right, a, i) [L65] COND TRUE !t [L66] return i; [L70] RET, EXPR tree_inorder(t->right, a, i) [L70] i = tree_inorder(t->right, a, i) [L71] return i; [L87] RET tree_inorder(t, x, n) [L88] EXPR x[0] [L88] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 416 SDtfs, 702 SDslu, 1142 SDs, 0 SdLazy, 1750 SolverSat, 679 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 27 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 383 NumberOfCodeBlocks, 383 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 287 ConstructedInterpolants, 0 QuantifiedInterpolants, 62731 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 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...