/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 06:46:18,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 06:46:18,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 06:46:18,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 06:46:18,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 06:46:18,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 06:46:18,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 06:46:18,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 06:46:18,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 06:46:18,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 06:46:18,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 06:46:18,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 06:46:18,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 06:46:18,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 06:46:18,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 06:46:18,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 06:46:18,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 06:46:18,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 06:46:18,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 06:46:18,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 06:46:18,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 06:46:18,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 06:46:18,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 06:46:18,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 06:46:18,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 06:46:18,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 06:46:18,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 06:46:18,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 06:46:18,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 06:46:18,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 06:46:18,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 06:46:18,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 06:46:18,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 06:46:18,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 06:46:18,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 06:46:18,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 06:46:18,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 06:46:18,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 06:46:18,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 06:46:18,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 06:46:18,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 06:46:18,563 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 06:46:18,612 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 06:46:18,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 06:46:18,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 06:46:18,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 06:46:18,615 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 06:46:18,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 06:46:18,615 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 06:46:18,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 06:46:18,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 06:46:18,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 06:46:18,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 06:46:18,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 06:46:18,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 06:46:18,617 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 06:46:18,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 06:46:18,617 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 06:46:18,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 06:46:18,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 06:46:18,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 06:46:18,618 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 06:46:18,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 06:46:18,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:46:18,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 06:46:18,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 06:46:18,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 06:46:18,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 06:46:18,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 06:46:18,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 06:46:18,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 06:46:18,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 06:46:18,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 06:46:19,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 06:46:19,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 06:46:19,028 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 06:46:19,029 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 06:46:19,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-10-27 06:46:19,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d220c1aa4/c0e72d15977e42bb85793a84b7c67e4a/FLAGd2a6727c9 [2020-10-27 06:46:19,801 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 06:46:19,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/tree_max_incorrect.c [2020-10-27 06:46:19,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d220c1aa4/c0e72d15977e42bb85793a84b7c67e4a/FLAGd2a6727c9 [2020-10-27 06:46:20,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d220c1aa4/c0e72d15977e42bb85793a84b7c67e4a [2020-10-27 06:46:20,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 06:46:20,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 06:46:20,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 06:46:20,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 06:46:20,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 06:46:20,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:46:20" (1/1) ... [2020-10-27 06:46:20,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0c1dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:20, skipping insertion in model container [2020-10-27 06:46:20,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:46:20" (1/1) ... [2020-10-27 06:46:20,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 06:46:20,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 06:46:20,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:46:20,379 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 06:46:20,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:46:20,425 INFO L208 MainTranslator]: Completed translation [2020-10-27 06:46:20,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:20 WrapperNode [2020-10-27 06:46:20,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 06:46:20,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 06:46:20,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 06:46:20,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 06:46:20,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:20" (1/1) ... [2020-10-27 06:46:20,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:20" (1/1) ... [2020-10-27 06:46:20,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:20" (1/1) ... [2020-10-27 06:46:20,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:20" (1/1) ... [2020-10-27 06:46:20,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:20" (1/1) ... [2020-10-27 06:46:20,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:20" (1/1) ... [2020-10-27 06:46:20,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:20" (1/1) ... [2020-10-27 06:46:20,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 06:46:20,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 06:46:20,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 06:46:20,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 06:46:20,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:46:20,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 06:46:20,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 06:46:20,565 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 06:46:20,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 06:46:20,565 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-10-27 06:46:20,565 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-10-27 06:46:20,565 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-27 06:46:20,566 INFO L138 BoogieDeclarations]: Found implementation of procedure task [2020-10-27 06:46:20,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 06:46:20,566 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 06:46:20,566 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 06:46:20,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 06:46:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 06:46:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 06:46:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 06:46:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 06:46:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 06:46:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 06:46:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-10-27 06:46:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 06:46:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 06:46:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 06:46:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-10-27 06:46:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 06:46:20,569 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 06:46:20,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 06:46:20,569 INFO L130 BoogieDeclarations]: Found specification of procedure task [2020-10-27 06:46:20,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 06:46:20,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 06:46:20,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 06:46:20,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 06:46:20,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 06:46:21,244 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 06:46:21,244 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 06:46:21,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:46:21 BoogieIcfgContainer [2020-10-27 06:46:21,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 06:46:21,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 06:46:21,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 06:46:21,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 06:46:21,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:46:20" (1/3) ... [2020-10-27 06:46:21,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a59762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:46:21, skipping insertion in model container [2020-10-27 06:46:21,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:46:20" (2/3) ... [2020-10-27 06:46:21,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a59762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:46:21, skipping insertion in model container [2020-10-27 06:46:21,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:46:21" (3/3) ... [2020-10-27 06:46:21,261 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max_incorrect.c [2020-10-27 06:46:21,280 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 06:46:21,287 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 06:46:21,302 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 06:46:21,348 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 06:46:21,348 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 06:46:21,348 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 06:46:21,348 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 06:46:21,348 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 06:46:21,349 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 06:46:21,349 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 06:46:21,349 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 06:46:21,372 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-10-27 06:46:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 06:46:21,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:46:21,381 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] [2020-10-27 06:46:21,382 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:46:21,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:46:21,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1479956305, now seen corresponding path program 1 times [2020-10-27 06:46:21,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:46:21,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803955232] [2020-10-27 06:46:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:46:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:21,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:21,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:22,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:22,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 06:46:22,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:46:22,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1088 [2020-10-27 06:46:22,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:22,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:46:22,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 06:46:22,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 06:46:22,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 06:46:22,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:46:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:22,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:22,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:22,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:22,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:22,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:46:22,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:22,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:22,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:22,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:22,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:22,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 06:46:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:22,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:22,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:22,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:22,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:22,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 06:46:22,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:22,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 06:46:22,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:22,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 06:46:22,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:23,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-27 06:46:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:23,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:23,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:23,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:23,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:23,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:46:23,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 06:46:23,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:23,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:23,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:23,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:46:23,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:46:23,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803955232] [2020-10-27 06:46:23,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:46:23,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 06:46:23,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927881886] [2020-10-27 06:46:23,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 06:46:23,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:46:23,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 06:46:23,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 06:46:23,135 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 10 states. [2020-10-27 06:46:23,548 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-27 06:46:23,818 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-27 06:46:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:46:24,860 INFO L93 Difference]: Finished difference Result 98 states and 125 transitions. [2020-10-27 06:46:24,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 06:46:24,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 06:46:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:46:24,874 INFO L225 Difference]: With dead ends: 98 [2020-10-27 06:46:24,874 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 06:46:24,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-27 06:46:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 06:46:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 06:46:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 06:46:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-10-27 06:46:24,934 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 25 [2020-10-27 06:46:24,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:46:24,934 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-10-27 06:46:24,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 06:46:24,935 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-10-27 06:46:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 06:46:24,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:46:24,938 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:46:24,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 06:46:24,938 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:46:24,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:46:24,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2109190382, now seen corresponding path program 1 times [2020-10-27 06:46:24,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:46:24,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470466155] [2020-10-27 06:46:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:46:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:24,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:25,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 06:46:26,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:46:26,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1105 [2020-10-27 06:46:26,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:46:26,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 06:46:26,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 06:46:26,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:26,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:46:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:26,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:26,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 06:46:26,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:46:26,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:26,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:46:26,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:26,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-27 06:46:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 06:46:26,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:26,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-27 06:46:26,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:46:26,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:26,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 06:46:26,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:26,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-10-27 06:46:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:26,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:26,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 06:46:26,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:26,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:26,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 06:46:26,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:26,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 06:46:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:46:26,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:26,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 06:46:26,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:46:26,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:46:26,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 06:46:26,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:26,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-27 06:46:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:46:26,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:46:26,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:46:26,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 06:46:26,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:46:26,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:46:26,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:46:26,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:46:26,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-27 06:46:26,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:46:26,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:46:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 06:46:26,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470466155] [2020-10-27 06:46:26,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:46:26,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 06:46:26,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713502513] [2020-10-27 06:46:26,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 06:46:26,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:46:26,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 06:46:26,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-27 06:46:26,485 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 11 states. [2020-10-27 06:46:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:46:27,419 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-10-27 06:46:27,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 06:46:27,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-27 06:46:27,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:46:27,423 INFO L225 Difference]: With dead ends: 61 [2020-10-27 06:46:27,423 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 06:46:27,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-27 06:46:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 06:46:27,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 06:46:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 06:46:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-27 06:46:27,438 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 35 [2020-10-27 06:46:27,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:46:27,439 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-27 06:46:27,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 06:46:27,439 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-27 06:46:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 06:46:27,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:46:27,441 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:46:27,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 06:46:27,442 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:46:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:46:27,443 INFO L82 PathProgramCache]: Analyzing trace with hash 841718904, now seen corresponding path program 1 times [2020-10-27 06:46:27,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:46:27,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035920132] [2020-10-27 06:46:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:46:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 06:46:27,475 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 06:46:27,476 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 06:46:27,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 06:46:27,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 06:46:27 BoogieIcfgContainer [2020-10-27 06:46:27,501 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 06:46:27,503 INFO L168 Benchmark]: Toolchain (without parser) took 7375.61 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 128.4 MB in the beginning and 94.7 MB in the end (delta: 33.7 MB). Peak memory consumption was 66.1 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:27,504 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 06:46:27,505 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.79 ms. Allocated memory is still 153.1 MB. Free memory was 127.7 MB in the beginning and 117.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:27,506 INFO L168 Benchmark]: Boogie Preprocessor took 46.89 ms. Allocated memory is still 153.1 MB. Free memory was 117.6 MB in the beginning and 116.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:27,507 INFO L168 Benchmark]: RCFGBuilder took 771.73 ms. Allocated memory is still 153.1 MB. Free memory was 115.9 MB in the beginning and 130.1 MB in the end (delta: -14.2 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:27,508 INFO L168 Benchmark]: TraceAbstraction took 6249.26 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 129.5 MB in the beginning and 94.7 MB in the end (delta: 34.9 MB). Peak memory consumption was 66.3 MB. Max. memory is 8.0 GB. [2020-10-27 06:46:27,511 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 292.79 ms. Allocated memory is still 153.1 MB. Free memory was 127.7 MB in the beginning and 117.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.89 ms. Allocated memory is still 153.1 MB. Free memory was 117.6 MB in the beginning and 116.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 771.73 ms. Allocated memory is still 153.1 MB. Free memory was 115.9 MB in the beginning and 130.1 MB in the end (delta: -14.2 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6249.26 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 129.5 MB in the beginning and 94.7 MB in the end (delta: 34.9 MB). Peak memory consumption was 66.3 MB. Max. memory is 8.0 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: [L60] CALL, EXPR nondet_tree() [L20] COND FALSE !(__VERIFIER_nondet_bool()) [L23] struct node *n = (struct node *)malloc(sizeof(struct node)); [L24] n->data = __VERIFIER_nondet_int() [L25] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; [L25] RET, EXPR nondet_tree() [L25] n->left = nondet_tree() [L26] CALL, EXPR nondet_tree() [L20] COND TRUE __VERIFIER_nondet_bool() [L21] return 0; [L26] RET, EXPR nondet_tree() [L26] n->right = nondet_tree() [L27] return n; [L60] RET, EXPR nondet_tree() [L60] CALL task(nondet_tree()) [L55] CALL, EXPR max(n) [L32] COND FALSE !(!n) [L35] EXPR n->left [L35] CALL, EXPR max(n->left) [L32] COND TRUE !n [L33] return -2147483648; [L35] RET, EXPR max(n->left) [L35] int a = max(n->left); [L36] EXPR n->right [L36] CALL, EXPR max(n->right) [L32] COND TRUE !n [L33] return -2147483648; [L36] RET, EXPR max(n->right) [L36] int b = max(n->right); [L37] COND TRUE a >= b [L37] return a; [L55] RET, EXPR max(n) [L55] int a = max(n); [L56] CALL check(n, a) [L43] COND TRUE \read(*n) [L44] EXPR n->data [L44] CALL __VERIFIER_assert(n->data <= a) [L11] COND TRUE !cond [L11] CALL reach_error() [L9] __assert_fail("0", "tree_max_incorrect.c", 9, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.1s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 141 SDslu, 281 SDs, 0 SdLazy, 527 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 8800 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 9/9 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...