/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:35:30,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:35:30,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:35:30,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:35:30,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:35:30,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:35:30,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:35:30,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:35:30,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:35:30,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:35:30,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:35:30,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:35:30,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:35:30,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:35:30,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:35:30,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:35:30,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:35:30,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:35:30,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:35:30,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:35:30,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:35:30,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:35:30,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:35:30,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:35:30,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:35:30,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:35:30,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:35:30,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:35:30,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:35:30,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:35:30,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:35:30,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:35:30,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:35:30,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:35:30,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:35:30,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:35:30,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:35:30,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:35:30,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:35:30,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:35:30,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:35:30,644 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:35:30,671 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:35:30,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:35:30,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:35:30,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:35:30,673 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:35:30,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:35:30,673 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:35:30,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:35:30,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:35:30,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:35:30,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:35:30,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:35:30,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:35:30,675 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:35:30,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:35:30,675 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:35:30,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:35:30,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:35:30,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:35:30,676 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:35:30,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:35:30,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:35:30,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:35:30,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:35:30,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:35:30,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:35:30,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:35:30,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:35:30,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:35:30,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:35:31,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:35:31,125 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:35:31,131 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:35:31,135 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:35:31,136 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:35:31,137 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-09-24 21:35:31,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0f8658ec/13cec94b8b6540e7816972acfc3326cf/FLAG3e1088390 [2020-09-24 21:35:31,784 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:35:31,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_del_rec_incorrect.c [2020-09-24 21:35:31,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0f8658ec/13cec94b8b6540e7816972acfc3326cf/FLAG3e1088390 [2020-09-24 21:35:32,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0f8658ec/13cec94b8b6540e7816972acfc3326cf [2020-09-24 21:35:32,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:35:32,136 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:35:32,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:35:32,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:35:32,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:35:32,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:35:32" (1/1) ... [2020-09-24 21:35:32,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@369e4506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:32, skipping insertion in model container [2020-09-24 21:35:32,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:35:32" (1/1) ... [2020-09-24 21:35:32,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:35:32,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:35:32,407 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-24 21:35:32,410 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-24 21:35:32,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:35:32,466 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:35:32,576 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-24 21:35:32,578 WARN L1484 CHandler]: Possible shadowing of function min [2020-09-24 21:35:32,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:35:32,615 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:35:32,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:32 WrapperNode [2020-09-24 21:35:32,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:35:32,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:35:32,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:35:32,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:35:32,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:32" (1/1) ... [2020-09-24 21:35:32,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:32" (1/1) ... [2020-09-24 21:35:32,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:32" (1/1) ... [2020-09-24 21:35:32,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:32" (1/1) ... [2020-09-24 21:35:32,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:32" (1/1) ... [2020-09-24 21:35:32,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:32" (1/1) ... [2020-09-24 21:35:32,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:32" (1/1) ... [2020-09-24 21:35:32,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:35:32,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:35:32,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:35:32,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:35:32,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:35:32,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:35:32,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:35:32,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:35:32,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:35:32,763 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-09-24 21:35:32,763 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-09-24 21:35:32,763 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2020-09-24 21:35:32,763 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-09-24 21:35:32,764 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-09-24 21:35:32,764 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-09-24 21:35:32,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:35:32,764 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-24 21:35:32,764 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-24 21:35:32,765 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 21:35:32,765 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-24 21:35:32,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:35:32,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 21:35:32,765 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:35:32,766 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:35:32,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:35:32,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:35:32,768 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-09-24 21:35:32,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 21:35:32,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:35:32,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 21:35:32,769 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-09-24 21:35:32,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 21:35:32,769 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2020-09-24 21:35:32,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:35:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:35:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-09-24 21:35:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-09-24 21:35:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-09-24 21:35:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:35:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-24 21:35:32,770 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:35:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:35:32,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:35:33,372 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:35:33,372 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:35:33,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:35:33 BoogieIcfgContainer [2020-09-24 21:35:33,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:35:33,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:35:33,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:35:33,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:35:33,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:35:32" (1/3) ... [2020-09-24 21:35:33,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf2b744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:35:33, skipping insertion in model container [2020-09-24 21:35:33,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:35:32" (2/3) ... [2020-09-24 21:35:33,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf2b744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:35:33, skipping insertion in model container [2020-09-24 21:35:33,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:35:33" (3/3) ... [2020-09-24 21:35:33,392 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_del_rec_incorrect.c [2020-09-24 21:35:33,405 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:35:33,422 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:35:33,446 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:35:33,484 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:35:33,484 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:35:33,484 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:35:33,484 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:35:33,485 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:35:33,485 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:35:33,485 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:35:33,485 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:35:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states. [2020-09-24 21:35:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 21:35:33,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:35:33,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:35:33,532 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:35:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:35:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1242734485, now seen corresponding path program 1 times [2020-09-24 21:35:33,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:35:33,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969639858] [2020-09-24 21:35:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:35:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:33,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:34,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:34,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-24 21:35:34,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:34,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-09-24 21:35:34,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:35:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-24 21:35:34,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:35:34,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:35:34,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:35:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:34,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:34,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:34,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:34,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:34,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:35:34,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:34,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:34,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:34,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:34,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:34,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 21:35:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:34,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:34,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:34,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:34,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:34,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:35:34,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:34,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:34,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:34,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:34,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:34,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 21:35:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:34,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:34,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:34,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:34,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:34,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:35:34,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:34,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:34,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:34,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:34,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:34,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 21:35:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:34,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:34,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:34,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:34,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:34,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:35:34,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:34,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:35:34,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:34,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:35:34,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:34,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 21:35:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:34,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:34,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:34,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:35:34,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:34,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:35:34,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:34,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:35:34,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 21:35:34,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:35:34,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:34,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-24 21:35:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:34,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:34,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:34,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:35:34,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:34,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:35:34,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:34,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:34,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-24 21:35:34,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:34,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:34,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:35:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:34,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:34,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:34,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:35:34,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:34,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:35:34,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:34,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:34,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:35:34,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:34,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:35:34,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969639858] [2020-09-24 21:35:34,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:35:34,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 21:35:34,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202232772] [2020-09-24 21:35:34,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:35:34,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:35:34,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:35:34,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:35:34,857 INFO L87 Difference]: Start difference. First operand 183 states. Second operand 11 states. [2020-09-24 21:35:36,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:35:36,116 INFO L93 Difference]: Finished difference Result 324 states and 379 transitions. [2020-09-24 21:35:36,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:35:36,119 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-09-24 21:35:36,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:35:36,138 INFO L225 Difference]: With dead ends: 324 [2020-09-24 21:35:36,138 INFO L226 Difference]: Without dead ends: 188 [2020-09-24 21:35:36,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:35:36,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-09-24 21:35:36,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 175. [2020-09-24 21:35:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-24 21:35:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 198 transitions. [2020-09-24 21:35:36,230 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 198 transitions. Word has length 60 [2020-09-24 21:35:36,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:35:36,231 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 198 transitions. [2020-09-24 21:35:36,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:35:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 198 transitions. [2020-09-24 21:35:36,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-24 21:35:36,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:35:36,237 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:35:36,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:35:36,238 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:35:36,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:35:36,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1686429873, now seen corresponding path program 1 times [2020-09-24 21:35:36,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:35:36,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598782305] [2020-09-24 21:35:36,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:35:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:36,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:36,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:36,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:40,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:40,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-09-24 21:35:40,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:35:40,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4503 [2020-09-24 21:35:40,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:40,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:35:40,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:35:40,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 21:35:40,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:35:40,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:35:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:40,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:40,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:40,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:40,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:40,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:35:40,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:40,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:40,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 21:35:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:40,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:40,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:40,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:40,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:40,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 21:35:40,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:40,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:35:40,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:40,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:35:40,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:41,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 21:35:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:41,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:41,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:41,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:41,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:41,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:35:41,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-24 21:35:41,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:41,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:35:41,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:41,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 21:35:41,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 21:35:41,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 21:35:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:41,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:41,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:41,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 21:35:41,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:41,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-24 21:35:41,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:41,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:35:41,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 21:35:41,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 21:35:41,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:41,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 21:35:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:41,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:41,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:41,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:41,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:41,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:35:41,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:41,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:35:41,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:41,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:35:41,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:41,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:35:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:41,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:41,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:41,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:41,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:41,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:35:41,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:41,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:35:41,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:41,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:35:41,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:41,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-24 21:35:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:41,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:41,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:41,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:35:41,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:41,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:35:41,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:41,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:41,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 21:35:41,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:41,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:41,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-24 21:35:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:41,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:41,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:41,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:35:41,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:41,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:35:41,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-24 21:35:41,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:41,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:41,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-24 21:35:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:41,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:41,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:41,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:35:41,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:41,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:35:41,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:41,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:41,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:35:41,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:41,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 21:35:41,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598782305] [2020-09-24 21:35:41,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:35:41,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 21:35:41,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086582621] [2020-09-24 21:35:41,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 21:35:41,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:35:41,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 21:35:41,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:35:41,398 INFO L87 Difference]: Start difference. First operand 175 states and 198 transitions. Second operand 14 states. [2020-09-24 21:35:43,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:35:43,137 INFO L93 Difference]: Finished difference Result 350 states and 404 transitions. [2020-09-24 21:35:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 21:35:43,138 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-09-24 21:35:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:35:43,141 INFO L225 Difference]: With dead ends: 350 [2020-09-24 21:35:43,142 INFO L226 Difference]: Without dead ends: 189 [2020-09-24 21:35:43,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:35:43,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-24 21:35:43,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 179. [2020-09-24 21:35:43,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-09-24 21:35:43,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 204 transitions. [2020-09-24 21:35:43,166 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 204 transitions. Word has length 80 [2020-09-24 21:35:43,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:35:43,166 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 204 transitions. [2020-09-24 21:35:43,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 21:35:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 204 transitions. [2020-09-24 21:35:43,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-24 21:35:43,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:35:43,170 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:35:43,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:35:43,170 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:35:43,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:35:43,170 INFO L82 PathProgramCache]: Analyzing trace with hash -646256580, now seen corresponding path program 1 times [2020-09-24 21:35:43,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:35:43,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304299900] [2020-09-24 21:35:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:35:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:43,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:43,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:43,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-09-24 21:35:48,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:35:48,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-09-24 21:35:48,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:35:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:35:48,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-09-24 21:35:48,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:48,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:35:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:48,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:48,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:48,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:35:48,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:48,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:48,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:48,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 21:35:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:48,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 21:35:48,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:48,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-09-24 21:35:48,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:35:48,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:48,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 21:35:48,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:48,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-24 21:35:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:48,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:48,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:48,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 21:35:48,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:35:48,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:48,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:35:48,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:48,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-24 21:35:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:48,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:48,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:48,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 21:35:48,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:35:48,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:48,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:35:48,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:48,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-24 21:35:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:48,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 21:35:48,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:48,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-24 21:35:48,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:35:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:48,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 21:35:48,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:48,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 21:35:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:48,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:48,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:48,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:35:48,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:48,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:48,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:48,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:48,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-24 21:35:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:48,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:48,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:48,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:35:48,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:48,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:48,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:48,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:48,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-24 21:35:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:48,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 21:35:48,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:48,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 21:35:48,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:35:48,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:48,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 21:35:48,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:48,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 21:35:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:48,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:48,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:48,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:35:48,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:48,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:48,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:48,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:48,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 21:35:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:48,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:35:48,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:48,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:35:48,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:35:48,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:48,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:35:48,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:35:48,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-24 21:35:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:48,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:35:48,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:48,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:35:48,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:35:48,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:48,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:35:48,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:48,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 21:35:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:48,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-24 21:35:48,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:48,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:35:48,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:35:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:35:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 21:35:48,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:48,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-09-24 21:35:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:35:48,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:35:48,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:35:48,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:35:48,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:35:48,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 21:35:48,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:35:48,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:35:48,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 21:35:48,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 21:35:48,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:35:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-24 21:35:48,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304299900] [2020-09-24 21:35:48,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:35:48,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-24 21:35:48,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430929323] [2020-09-24 21:35:48,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 21:35:48,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:35:48,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 21:35:48,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:35:48,881 INFO L87 Difference]: Start difference. First operand 179 states and 204 transitions. Second operand 14 states. [2020-09-24 21:35:50,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:35:50,292 INFO L93 Difference]: Finished difference Result 298 states and 339 transitions. [2020-09-24 21:35:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 21:35:50,292 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2020-09-24 21:35:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:35:50,297 INFO L225 Difference]: With dead ends: 298 [2020-09-24 21:35:50,297 INFO L226 Difference]: Without dead ends: 189 [2020-09-24 21:35:50,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-09-24 21:35:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-24 21:35:50,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 181. [2020-09-24 21:35:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-09-24 21:35:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 207 transitions. [2020-09-24 21:35:50,323 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 207 transitions. Word has length 124 [2020-09-24 21:35:50,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:35:50,324 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 207 transitions. [2020-09-24 21:35:50,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 21:35:50,324 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 207 transitions. [2020-09-24 21:35:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-24 21:35:50,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:35:50,327 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:35:50,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:35:50,327 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:35:50,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:35:50,328 INFO L82 PathProgramCache]: Analyzing trace with hash -435645933, now seen corresponding path program 1 times [2020-09-24 21:35:50,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:35:50,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551871288] [2020-09-24 21:35:50,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:35:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:35:50,381 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:35:50,381 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:35:50,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:35:50,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:35:50 BoogieIcfgContainer [2020-09-24 21:35:50,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:35:50,419 INFO L168 Benchmark]: Toolchain (without parser) took 18285.76 ms. Allocated memory was 147.8 MB in the beginning and 343.4 MB in the end (delta: 195.6 MB). Free memory was 102.8 MB in the beginning and 186.2 MB in the end (delta: -83.3 MB). Peak memory consumption was 112.2 MB. Max. memory is 7.1 GB. [2020-09-24 21:35:50,420 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 147.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 21:35:50,421 INFO L168 Benchmark]: CACSL2BoogieTranslator took 479.26 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 102.2 MB in the beginning and 181.0 MB in the end (delta: -78.8 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-09-24 21:35:50,422 INFO L168 Benchmark]: Boogie Preprocessor took 66.19 ms. Allocated memory is still 205.0 MB. Free memory was 181.0 MB in the beginning and 179.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-24 21:35:50,423 INFO L168 Benchmark]: RCFGBuilder took 697.53 ms. Allocated memory is still 205.0 MB. Free memory was 178.5 MB in the beginning and 138.1 MB in the end (delta: 40.3 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2020-09-24 21:35:50,424 INFO L168 Benchmark]: TraceAbstraction took 17033.21 ms. Allocated memory was 205.0 MB in the beginning and 343.4 MB in the end (delta: 138.4 MB). Free memory was 138.1 MB in the beginning and 186.2 MB in the end (delta: -48.0 MB). Peak memory consumption was 90.4 MB. Max. memory is 7.1 GB. [2020-09-24 21:35:50,427 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 147.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 479.26 ms. Allocated memory was 147.8 MB in the beginning and 205.0 MB in the end (delta: 57.1 MB). Free memory was 102.2 MB in the beginning and 181.0 MB in the end (delta: -78.8 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.19 ms. Allocated memory is still 205.0 MB. Free memory was 181.0 MB in the beginning and 179.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 697.53 ms. Allocated memory is still 205.0 MB. Free memory was 178.5 MB in the beginning and 138.1 MB in the end (delta: 40.3 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17033.21 ms. Allocated memory was 205.0 MB in the beginning and 343.4 MB in the end (delta: 138.4 MB). Free memory was 138.1 MB in the beginning and 186.2 MB in the end (delta: -48.0 MB). Peak memory consumption was 90.4 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: [L96] 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; [L96] RET, EXPR nondet_tree() [L96] CALL task(nondet_tree()) [L74] 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; [L74] RET, EXPR min(t) [L74] int a = min(t); [L75] int b; [L77] CALL, EXPR size(t) [L69] COND FALSE !(!t) [L70] EXPR t->left [L70] CALL, EXPR size(t->left) [L69] COND TRUE !t [L69] return 0; [L70] RET, EXPR size(t->left) [L70] EXPR t->right [L70] CALL, EXPR size(t->right) [L69] COND TRUE !t [L69] return 0; [L70] RET, EXPR size(t->right) [L70] return size(t->left) + size(t->right) + 1; [L77] RET, EXPR size(t) [L77] int n = size(t); [L78] CALL assume_abort_if_not(n != 0) [L10] COND FALSE !(!cond) [L78] RET assume_abort_if_not(n != 0) [L79] EXPR, FCALL calloc(n, sizeof(int)) [L79] int *x = calloc(n, sizeof(int)); [L80] CALL tree_inorder(t, x, n) [L58] COND FALSE !(!t) [L61] EXPR t->left [L61] CALL, EXPR tree_inorder(t->left, a, i) [L58] COND TRUE !t [L59] return i; [L61] RET, EXPR tree_inorder(t->left, a, i) [L61] i = tree_inorder(t->left, a, i) [L62] EXPR i++ [L62] EXPR t->data [L62] a[i++] = t->data [L63] EXPR t->right [L63] CALL, EXPR tree_inorder(t->right, a, i) [L58] COND TRUE !t [L59] return i; [L63] RET, EXPR tree_inorder(t->right, a, i) [L63] i = tree_inorder(t->right, a, i) [L64] return i; [L80] RET tree_inorder(t, x, n) [L81] EXPR x[0] [L81] CALL __VERIFIER_assert(a == x[0]) [L14] COND TRUE !cond [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 183 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.9s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 496 SDtfs, 744 SDslu, 1845 SDs, 0 SdLazy, 3009 SolverSat, 312 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 118 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 31 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 420 NumberOfCodeBlocks, 420 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 261 ConstructedInterpolants, 0 QuantifiedInterpolants, 82406 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 48/50 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...