/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --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_max_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:33:06,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:33:06,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:33:06,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:33:06,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:33:06,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:33:06,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:33:06,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:33:06,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:33:06,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:33:06,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:33:06,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:33:06,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:33:06,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:33:06,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:33:06,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:33:06,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:33:06,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:33:06,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:33:06,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:33:06,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:33:06,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:33:06,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:33:06,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:33:06,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:33:06,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:33:06,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:33:06,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:33:06,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:33:06,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:33:06,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:33:06,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:33:06,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:33:06,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:33:06,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:33:06,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:33:06,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:33:06,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:33:06,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:33:06,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:33:06,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:33:06,407 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 [2020-09-25 14:33:06,457 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:33:06,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:33:06,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:33:06,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:33:06,460 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:33:06,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:33:06,460 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:33:06,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:33:06,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:33:06,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:33:06,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:33:06,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:33:06,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:33:06,463 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:33:06,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:33:06,464 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:33:06,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:33:06,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:33:06,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:33:06,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:33:06,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:33:06,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:33:06,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:33:06,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:33:06,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:33:06,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:33:06,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:33:06,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:33:06,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:33:06,467 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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:33:06,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:33:06,943 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:33:06,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:33:06,951 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:33:06,951 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:33:06,952 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-09-25 14:33:07,054 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cefe08288/c91910909d2e4f9b8dfae002a783ab51/FLAG91f50b242 [2020-09-25 14:33:07,613 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:33:07,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-09-25 14:33:07,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cefe08288/c91910909d2e4f9b8dfae002a783ab51/FLAG91f50b242 [2020-09-25 14:33:07,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cefe08288/c91910909d2e4f9b8dfae002a783ab51 [2020-09-25 14:33:07,987 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:33:07,992 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:33:07,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:33:07,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:33:07,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:33:07,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:33:07" (1/1) ... [2020-09-25 14:33:08,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ae2094d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:33:08, skipping insertion in model container [2020-09-25 14:33:08,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:33:07" (1/1) ... [2020-09-25 14:33:08,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:33:08,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:33:08,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:33:08,348 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:33:08,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:33:08,395 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:33:08,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:33:08 WrapperNode [2020-09-25 14:33:08,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:33:08,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:33:08,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:33:08,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:33:08,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:33:08" (1/1) ... [2020-09-25 14:33:08,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:33:08" (1/1) ... [2020-09-25 14:33:08,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:33:08" (1/1) ... [2020-09-25 14:33:08,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:33:08" (1/1) ... [2020-09-25 14:33:08,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:33:08" (1/1) ... [2020-09-25 14:33:08,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:33:08" (1/1) ... [2020-09-25 14:33:08,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:33:08" (1/1) ... [2020-09-25 14:33:08,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:33:08,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:33:08,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:33:08,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:33:08,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:33:08" (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 [2020-09-25 14:33:08,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:33:08,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:33:08,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 14:33:08,597 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-09-25 14:33:08,597 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-09-25 14:33:08,598 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 14:33:08,598 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-09-25 14:33:08,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:33:08,598 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 14:33:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 14:33:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:33:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 14:33:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:33:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 14:33:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-09-25 14:33:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 14:33:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 14:33:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 14:33:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-09-25 14:33:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 14:33:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 14:33:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 14:33:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-09-25 14:33:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:33:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:33:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:33:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 14:33:08,964 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:33:08,964 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 14:33:08,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:33:08 BoogieIcfgContainer [2020-09-25 14:33:08,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:33:08,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:33:08,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:33:08,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:33:08,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:33:07" (1/3) ... [2020-09-25 14:33:08,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fea4b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:33:08, skipping insertion in model container [2020-09-25 14:33:08,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:33:08" (2/3) ... [2020-09-25 14:33:08,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fea4b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:33:08, skipping insertion in model container [2020-09-25 14:33:08,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:33:08" (3/3) ... [2020-09-25 14:33:08,983 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2020-09-25 14:33:08,999 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:33:09,012 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:33:09,037 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:33:09,073 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:33:09,074 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:33:09,074 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:33:09,074 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:33:09,074 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:33:09,074 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:33:09,075 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:33:09,075 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:33:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-09-25 14:33:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 14:33:09,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:33:09,113 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] [2020-09-25 14:33:09,114 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:33:09,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:33:09,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1509507830, now seen corresponding path program 1 times [2020-09-25 14:33:09,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:33:09,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848124670] [2020-09-25 14:33:09,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:33:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:33:09,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:33:09,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:33:10,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:33:10,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 14:33:10,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:33:10,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-09-25 14:33:10,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:33:10,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:33:10,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:33:10,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 14:33:10,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 14:33:10,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 14:33:10,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:33:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:33:10,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:33:10,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:33:10,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:33:10,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:33:10,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 14:33:10,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:33:10,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:33:10,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:33:10,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:33:10,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:33:10,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:33:10,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 14:33:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:33:10,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:33:10,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:33:10,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:33:10,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:33:10,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 14:33:10,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:33:10,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:33:10,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:33:10,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:33:10,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:33:10,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:33:10,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 14:33:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:33:10,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:33:10,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:33:10,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:33:10,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:33:10,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-25 14:33:10,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:33:10,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:33:10,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:33:10,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:33:10,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:33:10,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:33:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:33:10,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848124670] [2020-09-25 14:33:10,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:33:10,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-25 14:33:10,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483947470] [2020-09-25 14:33:10,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 14:33:10,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:33:10,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 14:33:10,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-25 14:33:10,749 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 9 states. [2020-09-25 14:33:11,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:33:11,804 INFO L93 Difference]: Finished difference Result 134 states and 163 transitions. [2020-09-25 14:33:11,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 14:33:11,807 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-09-25 14:33:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:33:11,824 INFO L225 Difference]: With dead ends: 134 [2020-09-25 14:33:11,824 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 14:33:11,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-25 14:33:11,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 14:33:11,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-09-25 14:33:11,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 14:33:11,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-09-25 14:33:11,901 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 33 [2020-09-25 14:33:11,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:33:11,902 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-09-25 14:33:11,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 14:33:11,903 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-09-25 14:33:11,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 14:33:11,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:33:11,908 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] [2020-09-25 14:33:11,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:33:11,909 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:33:11,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:33:11,909 INFO L82 PathProgramCache]: Analyzing trace with hash -297358705, now seen corresponding path program 1 times [2020-09-25 14:33:11,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:33:11,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995981050] [2020-09-25 14:33:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:33:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:33:11,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:33:11,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:33:13,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:33:13,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-25 14:33:13,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:33:13,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1150 [2020-09-25 14:33:13,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:33:13,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:33:13,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 14:33:13,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:33:13,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 14:33:13,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:33:13,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:33:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:33:13,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:33:13,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:33:13,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:33:13,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:33:13,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 14:33:13,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:33:13,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:33:13,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:33:13,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:33:13,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:33:13,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:33:13,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 14:33:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:33:13,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:33:13,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:33:13,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:33:13,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:33:13,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 14:33:13,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:33:13,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:33:13,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 14:33:13,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:33:13,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 14:33:13,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:33:13,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-25 14:33:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:33:13,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:33:13,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:33:13,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:33:13,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 14:33:13,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:33:13,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-25 14:33:13,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:33:13,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:33:13,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:33:13,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:33:13,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 14:33:13,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:33:13,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 14:33:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:33:13,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:33:13,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:33:13,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:33:13,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:33:13,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 14:33:13,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:33:13,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:33:13,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:33:13,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:33:13,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:33:13,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:33:13,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-25 14:33:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:33:13,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:33:13,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:33:13,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:33:13,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:33:13,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 14:33:13,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:33:13,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:33:13,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:33:13,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:33:13,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:33:13,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:33:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-25 14:33:13,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995981050] [2020-09-25 14:33:13,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:33:13,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-25 14:33:13,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685715116] [2020-09-25 14:33:13,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 14:33:13,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:33:13,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 14:33:13,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 14:33:13,441 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 10 states. [2020-09-25 14:33:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:33:14,160 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2020-09-25 14:33:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 14:33:14,162 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-09-25 14:33:14,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:33:14,166 INFO L225 Difference]: With dead ends: 105 [2020-09-25 14:33:14,167 INFO L226 Difference]: Without dead ends: 76 [2020-09-25 14:33:14,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-25 14:33:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-25 14:33:14,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-25 14:33:14,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 14:33:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-09-25 14:33:14,183 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 56 [2020-09-25 14:33:14,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:33:14,183 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-09-25 14:33:14,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 14:33:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-09-25 14:33:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-25 14:33:14,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:33:14,187 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-25 14:33:14,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:33:14,188 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:33:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:33:14,188 INFO L82 PathProgramCache]: Analyzing trace with hash 2103557100, now seen corresponding path program 1 times [2020-09-25 14:33:14,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:33:14,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505096168] [2020-09-25 14:33:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:33:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 14:33:14,240 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 14:33:14,240 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 14:33:14,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:33:14,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:33:14 BoogieIcfgContainer [2020-09-25 14:33:14,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 14:33:14,278 INFO L168 Benchmark]: Toolchain (without parser) took 6287.54 ms. Allocated memory was 141.0 MB in the beginning and 276.3 MB in the end (delta: 135.3 MB). Free memory was 102.7 MB in the beginning and 232.2 MB in the end (delta: -129.5 MB). Peak memory consumption was 5.8 MB. Max. memory is 7.1 GB. [2020-09-25 14:33:14,279 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.0 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. [2020-09-25 14:33:14,279 INFO L168 Benchmark]: CACSL2BoogieTranslator took 402.98 ms. Allocated memory is still 141.0 MB. Free memory was 102.0 MB in the beginning and 91.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-25 14:33:14,281 INFO L168 Benchmark]: Boogie Preprocessor took 121.21 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 91.6 MB in the beginning and 180.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-25 14:33:14,282 INFO L168 Benchmark]: RCFGBuilder took 454.00 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 157.7 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-09-25 14:33:14,283 INFO L168 Benchmark]: TraceAbstraction took 5300.05 ms. Allocated memory was 203.4 MB in the beginning and 276.3 MB in the end (delta: 72.9 MB). Free memory was 157.7 MB in the beginning and 232.2 MB in the end (delta: -74.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 14:33:14,287 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.0 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 402.98 ms. Allocated memory is still 141.0 MB. Free memory was 102.0 MB in the beginning and 91.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.21 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 91.6 MB in the beginning and 180.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 454.00 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 157.7 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5300.05 ms. Allocated memory was 203.4 MB in the beginning and 276.3 MB in the end (delta: 72.9 MB). Free memory was 157.7 MB in the beginning and 232.2 MB in the end (delta: -74.5 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L58] CALL, EXPR nondet_tree() [L18] COND FALSE !(__VERIFIER_nondet_bool()) [L21] struct node *n = (struct node *)malloc(sizeof(struct node)); [L22] n->data = __VERIFIER_nondet_int() [L23] CALL, EXPR nondet_tree() [L18] COND TRUE __VERIFIER_nondet_bool() [L19] return 0; [L23] RET, EXPR nondet_tree() [L23] n->left = nondet_tree() [L24] CALL, EXPR nondet_tree() [L18] COND TRUE __VERIFIER_nondet_bool() [L19] return 0; [L24] RET, EXPR nondet_tree() [L24] n->right = nondet_tree() [L25] return n; [L58] RET, EXPR nondet_tree() [L58] CALL task(nondet_tree()) [L53] CALL, EXPR max(n) [L30] COND FALSE !(!n) [L33] EXPR n->left [L33] CALL, EXPR max(n->left) [L30] COND TRUE !n [L31] return -2147483648; [L33] RET, EXPR max(n->left) [L33] int a = max(n->left); [L34] EXPR n->right [L34] CALL, EXPR max(n->right) [L30] COND TRUE !n [L31] return -2147483648; [L34] RET, EXPR max(n->right) [L34] int b = max(n->right); [L35] COND TRUE a >= b [L35] return a; [L53] RET, EXPR max(n) [L53] int a = max(n); [L54] CALL check(n, a) [L41] COND TRUE \read(*n) [L42] EXPR n->data [L42] CALL __VERIFIER_assert(n->data <= a) [L9] COND TRUE !cond [L9] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 83 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 261 SDslu, 325 SDs, 0 SdLazy, 735 SolverSat, 111 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 166 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 13637 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 13/13 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...